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Mechanical Project</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//m.gunkrazy.com/foldable-electric-tricycle-mechanical-projects/">Design and Fabrication of Foldable Electric Tricycle &#8211; Mechanical Project</a></p></header><div class="excerpt"><p>Design and Fabrication of Foldable Electric Tricycle - Mechanical Project
Introduction:
The design of the Electric Tricycle is adaptable to the current tricycles available with little modification....</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//m.gunkrazy.com/foldable-electric-tricycle-mechanical-projects/" aria-label="View Post: Design and Fabrication of Foldable Electric Tricycle &#8211; Mechanical Project">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Design and Fabrication of Foldable Electric Tricycle &#8211; Mechanical Project","url":"\/\/m.gunkrazy.com\/foldable-electric-tricycle-mechanical-projects\/","articleBody":"Design and Fabrication of Foldable Electric Tricycle - Mechanical Project\r\nIntroduction:\r\nThe design of the Electric Tricycle is adaptable to the current tricycles available with little modification. The design consists of an electric motor, controller and normal tricycle controls, and a power supply.\r\nAn electric motor was chosen because high fuel costs prohibited the use of a combustion engine and ease of maintenance. A solar array that provides electricity can be the ideal source of electricity for battery recharging or we can recharge it by plugging it in the AC power source. The first aspect of our design that was addressed was the drive system or means of power transmission. Power is transmitted directly from the electric hub motor to the front wheel of the tricycle. Second, a method of motor control was decided on. The E-Bike controller was used to control the motor speed and torque and to suit the different load and working condition. Third, power is supplied to the motor by a battery pack. Two 12 volt batteries are connected in series and placed in the battery box where the power is transmitted from the battery to the electric hub motor which drives the tricycle.\r\nObjectives of the project highlighting its importance:\r\n\r\n \tFolding ease: Folding should be easy, It should be stress-free, flexible.\r\n \tEnvironment friendly: Electrical energy is used to develop a vehicle that uses renewable energy, environmentally friendly and cheap, and it gives 0% Emission.\r\n \tEconomical: Tricycle should travel longer range and should be economical in running cost and in maintenance cost.\r\n \tReliability: It ought to have a steady ride, sure feel, and comparable execution to a regular bicycle. Fit different measured individuals, should have easy maintenance and reliability.\r\n \tRetailer Network: Program should offer two to three price points such as a good, better and best philosophy.\r\n\r\nDesign and Fabrication of Foldable Electric Tricycle - Mechanical Project\r\nMethodology:\r\n\r\n \tThe design calculations and computations are carried out.\r\n \tA design drawing is made.\r\n \tSuitable material are selected, according to the requirement.\r\n \tA suitable motor is been selected according to the design and calculation.\r\n \tThe motor is fixed to the rim and attached to the front wheel through spokes.\r\n \tThe necessary additional jobs such as cutting, drilling, welding and paint works were done.\r\n \tThe performance of the tricycle has been tested on road with the weight constraint of 90 kg.\r\n\r\nExpected Outcome of the project:\r\n\r\n \tThe study is expected to add value to already available literature.\r\n \tAn improvement in foldability of tricycle is attained.\r\n\r\nResults and conclusion:\r\n\r\n \tFolding ease and flexibility of tricycle is obtained.\r\n \tDC motor provided receives power from the battery, the relay decides when to activate and deactivate the motor.\r\n \tFrom experimental results we can conclude that reliability and economy of tricycle obtained.\r\n \tThe performance test done on the 500 w DC motor which gives a ride range of 25 min for 30 min of charge.\r\n\r\nFuture Scope:\r\n\r\n \tSolar panels can be used for charging of batteries. A solar powered Personal Transporter can go 20 to 30 kms.\r\n \tSolar docking stations can be used for the vehicles to get charged which can be installed conveniently in the campuses and large companies which save lot of power.\r\n \tA trolley can be attached to the rear so that it can carry loads and can be used in industries by accommodating a high powered motor.\r\n\r\n\r\n\r\n\r\nCOLLEGE : SRINIVASA INSTITUTE OF TECHNOLOGY, MANGALURU\r\nBRANCH : DEPARTMENT OF AUTOMOBILE ENGINEERING\r\nGUIDE : PROF. SANTHOSH KUMAR K.\r\nSTUDENTS : MR. CHETHAN\r\nMR. HITESH KUMAR A.\r\nMR. JOSHUA PEREIRA\r\nMR. PRAJWAL KUMAR V. POOJARY\r\n\r\n\r\n\r\nMore Resources \/articles\r\nHydraulic and Pneumatic Projects List - Abstract , Report Download\r\nRobotic and automation projects List - Abstract , Report\r\nRobotic and automation projects List - Abstract , Report\r\nDesign and Fabrication projects - Abstract , Report Download\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"Design and Fabrication of Foldable Electric Tricycle &#8211; Mechanical Project","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/m.gunkrazy.com\/"},"datePublished":"2019-11-25","mainEntityOfPage":"False","dateModified":"February 17, 2020","image":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2019\/11\/Design-and-Fabrication-of-Foldable-Electric-Tricycle-Mechanical-Project-300x201.jpg","height":201,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//m.gunkrazy.com/fabrication-of-pneumatic-operated-emergency-exit-system-in-aircraft/" rel="nofollow"><div class="image-container" style="background-image: url('//m.gunkrazy.com/wp-content/uploads/2019/11/Fabrication-Of-Pneumatic-Operated-Emergency-Exit-System-in-Aircraft-300x172.jpg')"></div><span class="sr-only">link to Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//m.gunkrazy.com/fabrication-of-pneumatic-operated-emergency-exit-system-in-aircraft/">Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft</a></p></header><div class="excerpt"><p>Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft
Abstract: 
Designing evacuation slides has grown more complex as the FAA has tightened performance standards. In the early 1960s,...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//m.gunkrazy.com/fabrication-of-pneumatic-operated-emergency-exit-system-in-aircraft/" aria-label="View Post: Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft","url":"\/\/m.gunkrazy.com\/fabrication-of-pneumatic-operated-emergency-exit-system-in-aircraft\/","articleBody":"Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft\r\nAbstract: \r\nDesigning evacuation slides has grown more complex as the FAA has tightened performance standards. In the early 1960s, slides had to deploy in 25 seconds in non-extreme weather: no wind and medium-range temperatures. Today\u2019s slides must deploy in six seconds in temperatures ranging from \u201365 to 160 degrees Fahrenheit and unfurl in winds up to 25 knots (28.7 mph). Airlines impose further challenges: Slides must be light and compact enough to fit inside an aircraft door or below the door sill or emergency exit window. So each slide is uniquely developed for its location on an aircraft model. So to overcome the above mentioned problems we are fabricating a pneumatic operated emergency exit system in aircrafts, which uses pneumatic cylinder to slide down the roller when the magnetic switch used in doors repels each other. The magnetic switches are connected to a microcontroller which in turn activated the relay. Once the relay is activated the solenoid valve connected to the relay will allow the air from compressor to pass through the pneumatic cylinder and the roller will slide down immediately for the passengers to exit the aircraft at emergency situations. \r\nIntroduction:\r\nAn emergency evacuation slide is an inflatable slide used to evacuate an aircraft quickly. An escape slide is required on all commercial (passenger carrying) aircraft where the door sill height is such that, in the event of an evacuation, passengers would be unable to step down from the door uninjured (FAA requires slides on all aircraft doors where the floor is 6 feet (1.8 m) or more above the ground).Escape slides are packed and held within the door structure inside the slide bustle, a protruding part of the inside of an aircraft door that varies with aircraft size, door size and door location. In many modern planes, to reduce evacuation time, evacuation slides deploy automatically when a door is opened in an \"armed\" condition. Modern planes often indicate an armed condition with an indicator light. Many slides are also designed to double as life rafts in case of a water landing.\r\nEmergency exits are found on passenger aircraft to provide a means of evacuation onto the wing, where passengers either continue off the trailing edge by sliding down the extended flaps or by using an evacuation slide that deploys when the exit is opened.\r\n\r\nEmergency exits are smaller in width and height than standard emergency exits on an aircraft, and therefore have a reduced evacuation capacity, and are typically added to aircraft where there is insufficient evacuation capacity at the main doors to obtain a 90 second evacuation, but where the addition of another set of full sized exits is not necessary to accomplish this. Emergency exits are primarily self-help exits meaning that in an emergency evacuation the passengers seated immediately adjacent to the exit will be responsible for assessing external hazards and opening the exit.\r\nObjectives:\r\n\u2022 More number of passengers can be evacuated within short period of time.\r\n\u2022 To work on the principle of pneumatic system.\r\n\u2022 To consume less power and easy to operate.\r\n\u2022 The width and height of the emergency door must be designed within limited standards.\r\n\u2022 The emergency pneumatic slider must roll out without any malfunctioning.\r\n\u2022 Must be feasible to employ in all aircrafts occupying less space.\r\nMethodology: \r\nIn the beginning we studied some journals, research paper &amp; googled too to get the good project to carry on with, after some researches finally we concluded the project topic and decided to go with it. And titled our project name as FABRICATION OF PNEUMATIC OPERATED EMERGENCY EXIT SYSTEM IN AIRCRAFT. In this project we will design an emergency exit system for an aircraft using pneumatic cylinders which will help passenger and crew of the aircraft to evacuate aircraft easily and safely very quickly without any injuries. Then we studied about the requirements and advancement for our project and designed a conceptual design for it, once we knew that our requirements were satisfied then we decided to go with preliminary and detailed design, in detailed design we assumed some specification for our project, selected the materials and components as per our requirement which are explained in detail below why we selected those and decided frame structure as rectangle since the aircraft door is in rectangle shape. And we created CAED model for our project and fabricated the very same CAED model and tested our model to get the good results compared to the one which exist.\r\nCAED Model\r\nFabrication Of Pneumatic Operated Emergency Exit System in Aircraft\r\n\r\nCOMPONENTS USED\r\n\r\n\u2022 Pneumatic cylinder\r\n\u2022 Over wing exit door\r\n\u2022 Solenoid Valve\r\n\u2022 Magnetic switches\r\n\u2022 Microcontroller\r\n\u2022 Relay\r\n\u2022 Battery 12 v, 1.3 AH\r\n\r\nWORKING PRINCIPLE\r\n\r\n\u2022 Initially in normal safe functioning of aircraft the emergency exit door will be closed and the magnetic switches will be attached.\r\n\u2022 During an emergency situation, when the emergency exit door is opened the magnetic switches will get apart and there exists some repelling force which generates a small voltage of about 5volts which can be sensed by micro controller.\r\n\u2022 The function of micro controller is to sense the voltage generated by the magnetic switches and activates the relay\/switch and also it sounds the alarm to indicate the pilot about the activation of emergency exit.\r\n\u2022 When the switch gets on or activated, it allows the air to flow from compressor to the solenoid valve.\r\n\u2022 The solenoid valve passes the air flow from compressor to the pneumatic cylinder.\r\n\u2022 The pneumatic cylinder will roll out from emergency exit door to the ground within in 5seconds of time when the air is passed into it through solenoid.\r\n\u2022 As soon as the pneumatic cylinder rolls out to the ground the passengers can slide on it easily and can be quickly reach the ground.\r\n\u2022 Time period of deploying can be increased by increasing the compressor pressure.\r\n\u2022 A typical block diagram is shown as follows.\r\nResult and conclusion:\r\n The prototype model fabricated during the conducted project work provides following results:\r\n\u2022 As soon as the emergency exit door is opened the evacuation slider deploys within 2-3 seconds which is the best result we have got comparing to the existing emergency exit system in aircraft.\r\n\u2022 Once the purpose of the evacuation slider is complete and the exit door is closed, the slider retracts back to its initial position.\r\n\u2022 Easy to slide since the slider deploys at 60 degree angle (sliding angle may vary depending on the requirements).\r\n\u2022 Since the pneumatic operated emergency exit system deploys within 2-3 seconds, more number of passengers can be evacuated quickly and safely.\r\n\u2022 If the air supplied to the pneumatic system is highly compressed then the slider deploys even faster.\r\n\r\nADVANTAGES\r\n\r\n\u2022 Not affected by cross-wind and medium-range temperature, since the slider is supported by the pneumatic cylinder and the slider material can withstand more temperature.\r\n\u2022 Puncture resistant\r\n\u2022 Cost saving\r\n\r\nLIMITATIONS\r\n\r\n\u2022 As there are mechanical linkages used in our concept, there may be problems arising with loads acting on them.\r\n\u2022 It cannot be adaptable to shapes for emergency evacuation such as window exits. But in present days most of the aircrafts use trailing edge flaps deployment which are enough to reach the ground and enables passenger\u2019s evacuation. So, this limitation does not possess much problem.\r\n\u2022 One more limitation is that the pneumatic cylinder does not withstand more weight.\r\n\r\n\r\n\r\nCOLLEGE : MANGALORE INSTITUTE OF TECHNOLOGY AND ENGINEERING, MANGALURU\r\n\r\nBRANCH : DEPARTMENT OF AERONAUTICAL ENGINEERING\r\n\r\nGUIDE : PROF. PRANEETH H.R.\r\n\r\nSTUDENTS : MR. PUNEETH J. REDDY MR. VIKAS PAWAR MR. J. ADARSH MS. SOUMYASHREE N.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nHydraulic Jack Projects\r\nPneumatic or Air operated projects\r\nHydraulic and Pneumatic Projects List - Abstract , Report Download\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\nSimple , Easy mechanical projectsManually Hand Operated projectsAffordable low budget Projects\r\n\r\n\r\n\r\n&nbsp;","headline":"Fabrication Of Pneumatic Operated Emergency Exit System in Aircraft","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/m.gunkrazy.com\/"},"datePublished":"2019-11-25","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2019\/11\/Fabrication-Of-Pneumatic-Operated-Emergency-Exit-System-in-Aircraft-300x172.jpg","height":172,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//m.gunkrazy.com/fluid-mechanics-mcq-objective-question-and-answers-part-2/" rel="nofollow"><div class="image-container" style="background-image: url('//m.gunkrazy.com/wp-content/uploads/2019/11/kinematic-viscosity-300x225.jpg')"></div><span class="sr-only">link to Fluid Mechanics MCQ Objective Question and Answers Part 2</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//m.gunkrazy.com/fluid-mechanics-mcq-objective-question-and-answers-part-2/">Fluid Mechanics MCQ Objective Question and Answers Part 2</a></p></header><div class="excerpt"><p>Fluid Mechanics MCQ Objective Question and Answers Part 2
Fluid Mechanics Multiple choice Objective Question useful for technical Aptitude test.  Fluid Mechanics MCQ : Part 1 | Part...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//m.gunkrazy.com/fluid-mechanics-mcq-objective-question-and-answers-part-2/" aria-label="View Post: Fluid Mechanics MCQ Objective Question and Answers Part 2">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Fluid Mechanics MCQ Objective Question and Answers Part 2","url":"\/\/m.gunkrazy.com\/fluid-mechanics-mcq-objective-question-and-answers-part-2\/","articleBody":"Fluid Mechanics MCQ Objective Question and Answers Part 2\r\nFluid Mechanics Multiple choice Objective Question useful for technical Aptitude test.\r\n\r\n\r\n\r\nFluid Mechanics MCQ : Part 1\u00a0|\u00a0Part 2\u00a0|\u00a0Part 3\u00a0|\u00a0Part 4 | Part 5\u00a0\r\n\r\n\r\n\r\n\r\n\r\n\r\n51. If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be\r\n\r\n(a) h\r\n(b) wh\r\n(c) w\/h\r\n(d) h\/w\r\n(e) h\/wh.\r\nAns: b\r\n\r\n52. Choose the wrong statement\r\n\r\n(a) Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force\r\n(b) Viscosity is due primarily to interaction between fluid molecules\r\n(c) Viscosity of liquids decreases with in-crease in temperature\r\n(d) Viscosity of liquids is appreciably affected by change in pressure\r\n(e) Viscosity is expressed as poise, stoke, or saybolt seconds.\r\nAns: d\r\n\r\n53. The units of kinematic viscosity are\r\n\r\n(a) metres2 per sec\r\n(b) kg sec\/metre\r\n(c) newton-sec per metre\r\n(d) newton-sec per metre\r\n(e) none of the above.\r\nAns: a\r\n\r\n54. The ratio of absolute viscosity to mass density is known as\r\n\r\n(a) specific viscosity\r\n(b) viscosity index\r\n(c) kinematic viscosity\r\n(d) coefficient of viscosity\r\n(e) coefficient of compressibility.\r\nAns: c\r\n\r\n55. Kinematic viscosity is equal to\r\n\r\n(a) dynamic viscosity\/density\r\n(b) dynamicviscosity x density\r\n(c) density\/dynamic viscosity\r\n(d) 1\/dynamicviscosity x density\r\n(e) same as dynamic viscosity.\r\nAns: a\r\n\r\n56. Which of the following is the unit of kinematic viscosity\r\n\r\n(a) pascal\r\n(b) poise\r\n(c) stoke\r\n(d) faraday\r\n(e) none of the above.\r\nAns: c\r\n\r\n\r\n\r\nkinematic viscosity\r\n\r\n\r\n\r\n57. A one dimensional flow is one which\r\n\r\n(a) is uniform flow\r\n(b) is steady uniform flow\r\n(c) takes place in straight lines\r\n(d) involves zero transverse component of flow\r\n(e) takes place in one dimension.\r\nAns: d\r\n\r\n58. Alcohol is used in manometers because\r\n\r\n(a) it has low vapour pressure\r\n(b) it is clearly visible\r\n(c) it has low surface tension\r\n(d) it can provide longer column due to low density\r\n(e) is provides suitable meniscus.\r\nAns: d\r\n\r\n59. A pressure of 25 m of head of water is equal to\r\n\r\n(a) 25 kN\/m2\r\n(b) 245 kN\/m2\r\n(c) 2500 kN\/m2\r\n(d) 2.5kN\/m2\r\n(e) 12.5 kN\/m2.\r\nAns: b\r\n\r\n60. Specific weight of sea water is more that of pure water because it contains\r\n\r\n(a) dissolved air\r\n(b) dissolved salt\r\n(c) suspended matter\r\n(d) all of the above\r\n(e) heavy water.\r\nAns: d\r\n\r\n61. If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its\r\n\r\n(a) specific weight\r\n(b) specific mass\r\n(c) specific gravity\r\n(d) specific density\r\n(e) none of the above.\r\nAns: c\r\n\r\n62. Free surface of a liquid tends to contract to the smallest possible area due to force of\r\n\r\n(a) surface tension\r\n(b) viscosity\r\n(c) friction\r\n(d) cohesion\r\n(e) adhesion.\r\nAns: a\r\n\r\n63. A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will\r\n\r\n(a) increase\r\n(b) decrease\r\n(c) remain same\r\n(d) increase\/decrease depending on depth of immersion\r\n(e) unpredictable.\r\nAns: c\r\n\r\n64. Falling drops of water become spheres due to the property of\r\n\r\n(a) adhesion\r\n(b) cohesion\r\n(c) surface tension\r\n(d) viscosity\r\n(e) compressibility.\r\nAns: c\r\n\r\n65. A liquid would wet the solid, if adhesion forces as compared to cohesion forces are\r\n\r\n(a) less\r\n(b) more\r\n(c) equal\r\n(d) less at low temperature and more at high temperature\r\n(e) there is no such criterion.\r\nAns: b\r\n\r\n66. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be\r\n\r\n(a) higher than the surface of liquid\r\n(b) the same as the surface of liquid\r\n(c) lower than the surface of liquid\r\n(d) unpredictable\r\n(e) none of the above.\r\nAns: c\r\n\r\n67. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as\r\n\r\n(a) meta center\r\n(b) center of pressure\r\n(c) center of buoyancy\r\n(d) center of gravity\r\n(e) none of the above.\r\nAns: b\r\n\r\n68. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be\r\n\r\n(a) 500 kg\r\n(b) 1000 kg\r\n(c) 1500 kg\r\n(d) 2000 kg\r\n(e) 4000 kg.\r\nAns: d\r\n\r\n69. The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to\r\n\r\n(a) Buoyancy\r\n(b) Equilibrium of a floating body\r\n(c) Archimedes' principle\r\n(d) Bernoulli's theorem\r\n(e) Metacentric principle.\r\nAns: c\r\n\r\n70. The resultant upward pressure of the fluid on an immersed body is called\r\n\r\n(a) upthrust\r\n(b) buoyancy\r\n(c) center of pressure\r\n(d) all the above are correct\r\n(e) none of above is correct.\r\nAns: b\r\n\r\n71. The conditions for the stable equilibrium of a floating body are\r\n\r\n(a) the meta-center should lie above the center of gravity\r\n(b) the center of buoyancy and the center of gravity must lie on the same vertical line\r\n(c) a righting couple should be formed\r\n(d) all the above are correct\r\n(e) none of the above is correct.\r\nAns: d\r\n\r\n72. Poise is the unit of\r\n\r\n(a) surface tension\r\n(b) capillarity\r\n(c) viscosity\r\n(d) shear stress in fluids\r\n(e) buoyancy.\r\nAns: c\r\n\r\n73. Metacentric height is given as the distance between\r\n\r\n(a) the center of gravity of the body and the meta center\r\n(b) the center of gravity of the body and the center of buoyancy\r\n(c) the center of gravity of the body and the center of pressure\r\n(d) center of buoyancy and metacentre\r\n(e) none of the above.\r\nAns: a\r\n\r\n74. The buoyancy depends on\r\n\r\n(a) mass of liquid displaced\r\n(b) viscosity of the liquid\r\n(c) pressure of the liquid displaced\r\n(d) depth of immersion\r\n(e) none of the above.\r\nAns: a\r\n\r\n75. The center of gravity of the volume of the liquid displaced by an immersed body is called\r\n\r\n(a) meta-center\r\n(b) center of pressure\r\n(c) center of buoyancy\r\n(d) center of gravity\r\n(e) none of the above.\r\nAns: c\r\n\r\n76. A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?\r\n\r\n(a) the metal piece will simply float over the mercury\r\n(b) the metal piece will be immersed in mercury by half\r\n(c) whole of the metal piece will be immersed with its top surface just at mercury level\r\n(d) metal piece will sink to the bottom\r\n(e) none of the above.\r\nAns: c\r\n\r\n77. The angle of contact in case of a liquid depends upon\r\n\r\n(a) the nature of the liquid and the solid\r\n(b) the material which exists above the free surface of the liquid\r\n(c) both of die above\r\n(d) any one of the above\r\n(e) none of die above.\r\nAns: c\r\n\r\n78. Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the\r\n\r\n(a) force of adhesion\r\n(b) force of cohesion\r\n(c) force of friction\r\n(d) force of diffusion\r\n(e) none of die above.\r\nAns: b\r\n\r\n79. Rain drops are spherical because of\r\n\r\n(a) viscosity\r\n(b) air resistance\r\n(c) surface tension forces\r\n(d) atmospheric pressure\r\n(e) none of the above.\r\nAns: c\r\n\r\n80. Surface energy per unit area of a surface is numerically equal to ..\r\n\r\n(a) atmospheric pressure\r\n(b) surface tension\r\n(c) force of adhesion\r\n(d) force of cohesion\r\n(e) viscosity.\r\nAns: b\r\n\r\n81. The capillary rise at 20\u00b0C in a clean glass tube of 1 mm bore containing water is approximately\r\n\r\n(a) 1 mm\r\n(b) 5 mm\r\n(c) 10 mm\r\n(d) 20 mm\r\n(e) 30 mm.\r\nAns: e\r\n\r\n82. The difference of pressure between the inside and outside of a liquid drop is\r\n\r\n(a)p = Txr\r\n(b)p = T\/r\r\n(c) p = T\/2r\r\n(d)p = 2T\/r\r\n(e) none of the above.\r\nAns: d\r\n\r\n83. If the surface of liquid is convex, men\r\n\r\n(a) cohesion pressure is negligible\r\n(b) cohesion pressure is decreased\r\n(c) cohesion pressure is increased\r\n(d) there is no cohesion pressure\r\n(e) none of the above.\r\nAns: c\r\n\r\n84. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than\r\n\r\n(a) 2.4 m above the hydraulic gradient\r\n(b) 6.4 m above the hydraulic gradient\r\n(c) 10.0 m above the hydraulic gradient\r\n(d) 5.0 above the hydraulic gradient\r\n(e) none of the above.\r\nAns: b\r\n\r\n85. To avoid an interruption in the flow of a syphon, an air vessel is provided\r\n\r\n(a) at the inlet\r\n(b) at the outlet\r\n(c) at the summit\r\n(d) ay nay point between inlet and outlet\r\n(e) none of the above.\r\nAns: c\r\n\r\n86. The vapour pressure over the concave surface is\r\n\r\n(a) less man the vapour pressure over the plane surface\r\n(b) equal to the vapour pressure over the plane surface\r\n(c) greater than the vapour pressure over the plane surface\r\n(d) zero\r\n(e) none of the above.\r\nAns: a\r\n\r\n87. The property by virtue of which a liquid opposes relative motion between its different layers is called\r\n\r\n(a) surface tension\r\n(b) co-efficient of viscosity\r\n(c) viscosity\r\n(d) osmosis\r\n(e) cohesion.\r\nAns: c\r\n\r\n88. The process of diffusion of one liquid into the other through a semi-permeable membrane is called\r\n\r\n(a) viscosity\r\n(b) osmosis\r\n(c) surface tension\r\n(d) cohesion\r\n(e) diffusivity.\r\nAns: b\r\n\r\n89. The units of dynamic or absolute viscosity are\r\n\r\n(a) metres2 per sec\r\n(b) kg sec\/meter\r\n(c) newton-sec per meter\r\n(d) newton-sec2 per meter\r\nAns: c\r\n\r\n90. The continuity equation is connected with\r\n\r\n(a) viscous\/unviscous fluids\r\n(b) compressibility of fluids\r\n(c) conservation of mass\r\n(d) steady\/unsteady flow\r\n(e) open channel\/pipe flow.\r\nAns: c\r\n\r\n91. The rise or depression of liquid in a tube due to surface tension\u00a0increase in size of tube will\r\n\r\n(a) increase\r\n(b) remain unaffected\r\n(c) may increase or decrease depending on the characteristics of liquid\r\n(d) decrease\r\n(e) unpredictable.\r\nAns: d\r\n\r\n92. Liquids transmit pressure equally in all the directions. This is according to\r\n\r\n(a) Boyle's law\r\n(b) Archimedes principle\r\n(c) Pascal's law\r\n(d) Newton's formula\r\n(e) Chezy's equation.\r\nAns: c\r\n\r\n93. Capillary action is due to the\r\n\r\n(a) surface tension\r\n(b) cohesion of the liquid\r\n(c) adhesion of the liquid molecules and the molecules on the surface of a solid\r\n(d) all of the above\r\n(e) none of the above.\r\nAns: d\r\n\r\n94. Newton's law of viscosity is a relationship between\r\n\r\n(a) shear stress anctthejiate of angular distortion\r\n(b) shear stress and viscosity\r\n(c) shear stress, velocity and viscosity\r\n(d) pressure, velocity and viscosity\r\n(e) shear stress, pressure and rate of angular distortion.\r\nAns: a\r\n\r\n95. The atmospheric pressure with rise in altitude decreases\r\n\r\n(a) linearly\r\n(b) first slowly and then steeply\r\n(c) first steeply and then gradually\r\n(d) unpredictable\r\n(e) none of the above.\r\nAns: b\r\n\r\n96. Pressure of the order of 10\"' torr can be measured by\r\n\r\n(a) Bourdon tube\r\n(b) Pirani Gauge\r\n(c) micro-manometer\r\n(d) ionisastion gauge\r\n(e) McLeod gauge.\r\nAns: d\r\n\r\n97. Operation of McLeod gauge used for low pressure measurement is based on the principle of\r\n\r\n(a) gas law\r\n(b) Boyle's law\r\n(c) Charle's law\r\n(d) Pascal's law\r\n(e) McLeod's law.\r\nAns: b\r\n\r\n98. An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of\r\n\r\n(a) 1\r\n(b) 1.2\r\n(c) 0.8\r\n(d) 0.75\r\n(e) 1.25.\r\nAns: d\r\n\r\n99. In an isothermal atmosphere, the pressure\r\n\r\n(a) decreases linearly with elevation\r\n(b) remains constant\r\n(c) varies in the same way as the density\r\n(d) increases exponentially with elevation\r\n(e) unpredictable.\r\nAns: c\r\n\r\n100. Mercury is often used in barometer because\r\n\r\n(a) it is the best liquid\r\n(b) the height of barometer will be less\r\n(c) its vapour pressure is so low that it may be neglected\r\n(d) both (b) and (c)\r\n(e) it moves easily.\r\nAns: d","headline":"Fluid Mechanics MCQ Objective Question and Answers Part 2","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/m.gunkrazy.com\/"},"datePublished":"2019-11-19","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2019\/11\/kinematic-viscosity-300x225.jpg","height":225,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//m.gunkrazy.com/fluid-mechanics-mcq-objective-question-answers-part-1/" rel="nofollow"><div class="image-container" style="background-image: url('//m.gunkrazy.com/wp-content/uploads/2019/11/specific-gravity-300x201.png')"></div><span class="sr-only">link to Fluid Mechanics MCQ Objective Question and Answers Part 1</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//m.gunkrazy.com/fluid-mechanics-mcq-objective-question-answers-part-1/">Fluid Mechanics MCQ Objective Question and Answers Part 1</a></p></header><div class="excerpt"><p>Fluid Mechanics MCQ Objective Question and Answers Part 1
Fluid Mechanics Multiple choice Objective Question useful for technical Aptitude test.  Fluid Mechanics MCQ : Part 1 | Part...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//m.gunkrazy.com/fluid-mechanics-mcq-objective-question-answers-part-1/" aria-label="View Post: Fluid Mechanics MCQ Objective Question and Answers Part 1">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Fluid Mechanics MCQ Objective Question and Answers Part 1","url":"\/\/m.gunkrazy.com\/fluid-mechanics-mcq-objective-question-answers-part-1\/","articleBody":"Fluid Mechanics MCQ Objective Question and Answers Part 1\r\nFluid Mechanics Multiple choice Objective Question useful for technical Aptitude test.\r\n\r\n\r\n\r\nFluid Mechanics MCQ : Part 1\u00a0|\u00a0Part 2\u00a0|\u00a0Part 3\u00a0|\u00a0Part 4 | Part 5\u00a0\r\n\r\n\r\n\r\n\r\n\r\n\r\n1. Fluid is a substance that\r\n\r\n(a) cannot be subjected to shear forces\r\n(b) always expands until it fills any container\r\n(c) has the same shear stress.at a point regardless of its motion\r\n(d) cannot remain at rest under action of any shear force\r\n(e) flows.\r\nAns: d\r\n\r\n2. Fluid is a substance which offers no resistance to change of\r\n\r\n(a) pressure\r\n(b) flow\r\n(c) shape\r\n(d) volume\r\n(e) temperature.\r\nAns: c\r\n\r\n3. Practical fluids\r\n\r\n(a) are viscous\r\n(b) possess surface tension\r\n(c) are compressible\r\n(d) possess all the above properties\r\n(e) possess none of the above properties.\r\nAns: d\r\n\r\n4. In a static fluid\r\n\r\n(a) resistance to shear stress is small\r\n(b) fluid pressure is zero\r\n(c) linear deformation is small\r\n(d) only normal stresses can exist\r\n(e) viscosity is nil.\r\nAns: d\r\n\r\n5. A fluid is said to be ideal, if it is\r\n\r\n(a) incompressible\r\n(b) inviscous\r\n(c) viscous and incompressible\r\n(d) inviscous and compressible\r\n(e) inviscous and incompressible.\r\nAns: e\r\n\r\n6. An ideal flow of any fluid must fulfill the following\r\n\r\n(a) Newton's law of motion\r\n(b) Newton's law of viscosity\r\n(c) Pascal' law\r\n(d) Continuity equation\r\n(e) Boundary layer theory.\r\nAns: d\r\n\r\n7. If no resistance is encountered by displacement, such a substance is known as\r\n\r\n(a) fluid\r\n(b) water\r\n(c) gas\r\n(d) perfect solid\r\n(e) ideal fluid.\r\nAns: e\r\n\r\n8. The volumetric change of the fluid caused by a resistance is known as\r\n\r\n(a) volumetric strain\r\n(b) volumetric index\r\n(c) compressibility\r\n(d) adhesion\r\n(e) cohesion.\r\nAns: c\r\n\r\n9. Liquids\r\n\r\n(a) cannot be compressed\r\n(b) occupy definite volume\r\n(c) are not affected by change in pressure and temperature\r\n(d) are not viscous\r\n(e) none of the above.\r\nAns: e\r\n\r\n10. Density of water is maximum at\r\n\r\n(a) 0\u00b0C\r\n(b) 0\u00b0K\r\n(c) 4\u00b0C\r\n(d) 100\u00b0C\r\n(e) 20\u00b0C.\r\nAns: c\r\n\r\n11. The value of mass density in kgsecVm4 for water at 0\u00b0C is\r\n\r\n(a) 1\r\n(b) 1000\r\n(c) 100\r\n(d) 101.9\r\n(e) 91\r\nAns: d\r\n\r\n12. Property of a fluid by which its own molecules are attracted is called\r\n\r\n(a) adhesion\r\n(b) cohesion\r\n(c) viscosity\r\n(d) compressibility\r\n(e) surface tension.\r\nAns: b\r\n\r\n13. Mercury does not wet glass. This is due to property of liquid known as\r\n\r\n(a) adhesion\r\n(b) cohesion\r\n(c) surface tension\r\n(d) viscosity\r\n(e) compressibility.\r\nAns: c\r\n\r\n14. The property of a fluid which enables it to resist tensile stress is known as\r\n\r\n(a) compressibility\r\n(b) surface tension\r\n(c) cohesion\r\n(d) adhesion\r\n(e) viscosity.\r\nAns: c\r\n\r\n15. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called\r\n\r\n(a) adhesion\r\n(b) cohesion\r\n(c) viscosity\r\n(d) compressibility\r\n(e) surface tension.\r\nAns: a\r\n\r\n16. The specific weight of water is 1000 kg\/m\"\r\n\r\n(a) at normal pressure of 760 mm\r\n(b) at 4\u00b0C temperature\r\n(c) at mean sea level\r\n(d) all the above\r\n(e) none of the above.\r\nAns: d\r\n\r\n17. Specific weight of water in S.I. units is equal to\r\n\r\n(a) 1000 N\/m3\r\n(b) 10000 N\/m3\r\n(c) 9.81 x lO3 N\/m3\r\n(d) 9.81 x lO6 N\/m3\r\n(e) 9.81 N\/m3.\r\nAns: c\r\n\r\n18. When the flow parameters at any given instant remain same at every point, then flow is said to be\r\n\r\n(a) quasi static\r\n(b) steady state\r\n(c) laminar\r\n(d) uniform\r\n(e) static.\r\nAns: d\r\n\r\n19. Which of the following is\u00a0dimensionless\r\n(a) specific weight\r\n(b) specific volume\r\n(c) specific speed\r\n(d) specific gravity\r\n(e) specific viscosity.\r\nAns: d\r\n\r\n\r\n\r\nspecific gravity\r\n\r\n\r\n\r\n20. The normal stress in a fluid will be constant in all directions at a point only if\r\n\r\n(a) it is incompressible\r\n(b) it has uniform viscosity\r\n(c) it has zero viscosity\r\n(d) it is frictionless\r\n(e) it is at rest.\r\nAns: e\r\n\r\n21. The pressure at a point in a fluid will not be same in all the directions when the fluid is\r\n\r\n(a) moving\r\n(b) viscous\r\n(c) viscous and static\r\n(d) inviscous and moving\r\n(e) viscous and moving.\r\nAns: e\r\n\r\n22. An object having 10 kg mass weighs 9.81kg on a spring balance. The value of 'g' at this place is\r\n\r\n(a) 10m\/sec2\r\n(b) 9.81 m\/sec2\r\n(c) 10.2\/m sec\r\n(d) 9.75 m\/sec2\r\n(e) 9 m\/sec .\r\nAns: a\r\n\r\n23. The tendency of a liquid surface to contract is due to the following property\r\n(a) cohesion\r\n(b) adhesion\r\n(c) viscosity\r\n(d) surface tension\r\n(e) elasticity.\r\nAns: d\r\n\r\n24. The surface tension of mercury at normal temperature compared to that of water is\r\n\r\n(a) more\r\n(b) less\r\n(c) same\r\n(d) more or less depending on size of glass tube\r\n(e) none of the above.\r\nAns: a\r\n\r\n25. A perfect gas\r\n\r\n(a) has constant viscosity\r\n(b) has zero viscosity\r\n(c) is in compressible\r\n(d) is of theoretical interest\r\n(e) none of the above.\r\nAns: e\r\n\r\n26. For very great pressures, viscosity of moss gases and liquids\r\n\r\n(a) remains same\r\n(b) increases\r\n(c) decreases\r\n(d) shows erratic behavior\r\n(e) none of the above.\r\nAns: d\r\n\r\n27. A fluid in equilibrium can't sustain\r\n\r\n(a) tensile stress\r\n(b) compressive stress\r\n(c) shear stress\r\n(d) bending stress\r\n(e) all of the above.\r\nAns: c\r\n\r\n28. Viscosity of water in comparison to mercury is\r\n\r\n(a) higher\r\n(b) lower\r\n(c) same\r\n(d) higher\/lower depending on temperature\r\n(e) unpredictable.\r\nAns: a\r\n\r\n29. The bulk modulus of elasticity with increase in pressure\r\n\r\n(a) increases\r\n(b) decreases\r\n(c) remains constant\r\n(d) increases first up to certain limit and then decreases\r\n(e) unpredictable.\r\nAns: a\r\n\r\n30. The bulk modulus of elasticity\r\n\r\n(a) has the dimensions of 1\/pressure\r\n(b) increases with pressure\r\n(c) is large when fluid is more compressible\r\n(d) is independent of pressure and viscosity\r\n(e) is directly proportional to flow.\r\nAns: b\r\n\r\n31. A balloon lifting in air follows the following principle\r\n\r\n(a) law of gravitation\r\n(b) Archimedes principle\r\n(c) principle of buoyancy\r\n(d) all of the above\r\n(e) continuity equation.\r\nAns: d\r\n\r\n32. The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg\/cm is equal to\r\n\r\n(a) 1000\r\n(b) 2100\r\n(c) 2700\r\n(d) 10,000\r\n(e) 21,000.\r\nAns: e\r\n\r\n33. The increase of temperature results in\r\n\r\n(a) increase in viscosity of gas\r\n(b) increase in viscosity of liquid\r\n(c) decrease in viscosity of gas\r\n(d) decrease in viscosity of liquid\r\n(e) (a) and (d) above.\r\nAns: d\r\n\r\n34. Surface tension has the units of\r\n\r\n(a) newtons\/m\r\n(b) newtons\/m\r\n(c) new tons\/m\r\n(d) newtons\r\n(e) newton m.\r\nAns: c\r\n\r\n35. Surface tension\r\n\r\n(a) acts in the plane of the interface normal to any line in the surface\r\n(b) is also known as capillarity\r\n(c) is a function of the curvature of the interface\r\n(d) decreases with fall in temperature\r\n(e) has no units.\r\nAns: a\r\n\r\n36. The stress-strain relation of the newtoneon fluid is\r\n\r\n(a) linear\r\n(b) parabolic\r\n(c) hyperbolic\r\n(d) inverse type\r\n(e) none of the above.\r\nAns: a\r\n\r\n37. A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg\/cm2 and a volume of 0.039 m3 at 150 kg\/cm2. The bulk modulus of elasticity of liquid is \r\n\r\n(a) 400 kg\/cm2\r\n(b) 4000 kg\/cm2\r\n(c) 40 x 105 kg\/cm2\r\n(d) 40 x 106 kg\/cm2\r\n(e) none of the above.\r\nAns: b\r\n\r\n38. The units of viscosity are\r\n\r\n(a) metres2 per sec\r\n(b) kg sec\/metre\r\n(c) newton-sec per metre2\r\n(d) newton-sec per meter\r\n(e) none of the above.\r\nAns: b\r\n\r\n39. Kinematic viscosity is dependent upon\r\n\r\n(a) pressure\r\n(b) distance\r\n(c) level\r\n(d) flow\r\n(e) density.\r\nAns: e\r\n\r\n40. Units of surface tension are\r\n\r\n(a) energy\/unit area\r\n(b) distance\r\n(c) both of the above\r\n(d) it has no units\r\n(e) none of the above.\r\nAns: c\r\n\r\n41. Which of the following meters is not associated with viscosity\r\n\r\n(a) Red wood\r\n(b) Say bolt\r\n(c) Engler\r\n(d) Orsat\r\n(e) none of the above.\r\nAns: d\r\n\r\n42. Choose the correct relationship\r\n\r\n(a) specific gravity = gravity x density\r\n(b) dynamicviscosity = kinematicviscosity x density\r\n(c) gravity = specific gravity x density\r\n(d) kinematicviscosity = dynamicviscosity x density\r\n(e) hydrostaticforce = surface tension x gravity.\r\nAns: b\r\n\r\n43. Dimensions of surface tension are\r\n\r\n(a) MlL\u00b0T2\r\n(b) MlL\u00b0Tx\r\n(c) MlL r2\r\n(d) MlL2T2\r\n(e) MlL\u00b0t.\r\nAns: a\r\n\r\n44. For manometer, a better liquid combination is one having\r\n\r\n(a) higher surface tension\r\n(b) lower surface tension\r\n(c) surface tension is no criterion\r\n(d) high density and viscosity\r\n(e) low density and viscosity.\r\nAns: a\r\n\r\n45. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water\r\n\r\n(a) 51 cm\r\n(b) 50 cm\r\n(c) 52 cm\r\n(d) 52.2 cm\r\n(e) 51.7 cm.\r\nAns: a\r\n\r\n46. Choose the wrong statement.\r\nAlcohol is used in manometer, because\r\n\r\n(a) its vapour pressure is low\r\n(b) it provides suitable meniscus for the inclined tube\r\n(c) its density is less\r\n(d) it provides longer length for a given pressure difference\r\n(e) it provides accurate readings.\r\nAns: a\r\n\r\n47. Increase in pressure at the outer edge of a drum of radius R due to rotation at corad\/sec, full of liquid of density p will be\r\n\r\n(a) pco2\/?2\r\n(b) pco2\/?2\/2\r\n(c) 2pa2R2\r\n(d) pa2R\/2\r\n(e) none of the above.\r\nAns: b\r\n\r\n48. The property of fluid by virtue of which it offers resistance to shear is called\r\n\r\n(a) surface tension\r\n(b) adhesion\r\n(c) cohesion\r\n(d) viscosity\r\n(e) all of the above.\r\nAns: d\r\n\r\n49. Choose the wrong statement\r\n\r\n(a) fluids are capable of flowing\r\n(b) fluids conform to the shape of the containing vessels\r\n(c) when in equilibrium, fluids cannot sustain tangential forces\r\n(d) when in equilibrium, fluids can sustain shear forces\r\n(e) fluids have some degree of comprehensibility and offer little resistance to form.\r\nAns: d\r\n\r\n50. The density of water is 1000 kg\/m3 at\r\n\r\n(a) 0\u00b0C\r\n(b) 0\u00b0K\r\n(c) 4\u00b0C (d) 20\u00b0C\r\n(e) all temperature.\r\nAns: c","headline":"Fluid Mechanics MCQ Objective Question and Answers Part 1","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/m.gunkrazy.com\/"},"datePublished":"2019-11-19","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2019\/11\/specific-gravity-300x201.png","height":201,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//m.gunkrazy.com/what-is-microprocessor-elements-of-microprocessors/" rel="nofollow"><div class="image-container" style="background-image: url('//m.gunkrazy.com/wp-content/uploads/2019/11/microprocessor-300x165.jpg')"></div><span class="sr-only">link to What is Microprocessor | Elements of Microprocessors</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//m.gunkrazy.com/what-is-microprocessor-elements-of-microprocessors/">What is Microprocessor | Elements of Microprocessors</a></p></header><div class="excerpt"><p>What is Microprocessor | Elements of Microprocessors
Today microprocessor based systems are used in almost every sphere of live. Their applications are increasing at fast rate day by day. A...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//m.gunkrazy.com/what-is-microprocessor-elements-of-microprocessors/" aria-label="View Post: What is Microprocessor | Elements of Microprocessors">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"What is Microprocessor | Elements of Microprocessors","url":"\/\/m.gunkrazy.com\/what-is-microprocessor-elements-of-microprocessors\/","articleBody":"What is Microprocessor | Elements of Microprocessors\r\nToday microprocessor based systems are used in almost every sphere of live. Their applications are increasing at fast rate day by day. A microprocessor is used as CPU of a computer. Besides CPU, it is also used to control input, output and devices of a computer. Single microcomputers also called microcontrollers. Micro controllers are widely in many applications such as automatic control in industry for process and machine control etc.\r\nComputers have been used since 1950s. Digital computers were large, expensive machines used by Governments and large businesses. The size and shape of the digital computer has changed into small size by invention of a new device called the microprocessor.\r\nFunctional Block Diagram of Microprocessor\r\nBasically Microprocessor contains three elements such as\r\n\r\n microprocessor\r\n\r\n1. ALU\r\n2. Register Array\r\n3. Control\r\n1. ALU - Arithmetic and Logic Unit\r\n\r\n \tThe ALU carries out the arithmetic and logic operations on 8-bit words. It can perform arithmetic operations such as addition, subtraction and logical operations such as AND, OR and EX-OR.\r\n \tThe contents of the accumulator and the temporary register are the inputs to the ALU. The ALU result is then stored back in the accumulator. The ALU of a simple less powerful microprocessor such as Intel 8085 does not have multiplication and division instruction.\r\n\r\n2. Register Array\r\n\r\n \tRegister is a storage unit within the microprocessor used to store the data, address of instruction of any program.\r\n \tMicroprocessor contains six general purpose registers it has 8-bit memory and registers are B, C, D, E, H and L register. To hold 16-bit data a combination of two 8-bit registers can be used.\r\n \tThe combination of two 8-bit registers is known as Register Pair (BC, DE and HL). These registers are used to store data temporarily during the execution of the program and are accessible to the user through instructions.\r\n\r\n3. Control Unit\r\nThe timing and control unit acts as the brain of a computer. It controls all operations of the CPU. It also controls input, output and all other devices connected to the CPU. It generates signals which are required for all the operations to be performed by the CPU and required for the control of input\/output and other devices connected to CPU. Such signals are also called timing signals because it has strict relation with clock signal (i.e., time) of the processor.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nMeasurement Science and Metrology Notes , Articles\r\nMechatronics System Notes , article , Interview Que and Ans\r\nMechanical MCQ Objectives Question and Answers\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\n\r\n\r\n\r\n&nbsp;","headline":"What is Microprocessor | Elements of Microprocessors","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/m.gunkrazy.com\/"},"datePublished":"2019-11-12","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2019\/11\/microprocessor-300x165.jpg","height":165,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//m.gunkrazy.com/total-radiation-pyrometer-diagram-working-advantages/" rel="nofollow"><div class="image-container" style="background-image: url('//m.gunkrazy.com/wp-content/uploads/2019/11/total-radiation-pyrometer-diagram-300x258.jpg')"></div><span class="sr-only">link to Total Radiation Pyrometer &#8211; Diagram , Working , Advantages</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//m.gunkrazy.com/total-radiation-pyrometer-diagram-working-advantages/">Total Radiation Pyrometer &#8211; Diagram , Working , Advantages</a></p></header><div class="excerpt"><p>Total Radiation Pyrometer - Diagram , Working , Advantages
Thermal radiation is an electromagnetic radiation emitted by a body as a result of its temperature. Thermal radiation is in the wavelength...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//m.gunkrazy.com/total-radiation-pyrometer-diagram-working-advantages/" aria-label="View Post: Total Radiation Pyrometer &#8211; Diagram , Working , Advantages">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Total Radiation Pyrometer &#8211; Diagram , Working , Advantages","url":"\/\/m.gunkrazy.com\/total-radiation-pyrometer-diagram-working-advantages\/","articleBody":"Total Radiation Pyrometer - Diagram , Working , Advantages\r\nThermal radiation is an electromagnetic radiation emitted by a body as a result of its temperature. Thermal radiation is in the wavelength region from about 0.1-100 \u00b5m. \r\n\r\nThe total radiation emitted by a blackbody is given by , Eb = \u03c3 x T ^4\r\n\r\nwhere\u00a0 \r\n\r\n \t\u03c3 \u00a0is the Stefan Boltzmann constant (5.669 x 10^-8 W\/m^2 y,\r\n \tEb is the emissive power, and\r\n \tT is the absolute temperature in K.\r\n\r\nConstruction :\r\nThe total radiation of pyrometer has one housing tube in which an adjustable eye piece is fixed at one end of the housing tube and the other end is free to receive radiations from the radiating object whose temperature is to be measured. A rack and pinion attachment is used to adjust the position of a concave mirror (Figure ). A thermocouple is also provided to receive the radiation and the thermocouple is\r\nconnected to the milli voltmeter to measure the temperature.\r\n\r\ntotal radiation pyrometer diagram\r\nWorking\r\nThermal radiations from the radiating object come inside the housing tube. These radiations fall on the concave mirror and they are reflected to the hot junction of the thermocouple. So, an e.m.f. will be produced in the thermocouple and it is measured by using a milli voltmeter. This change in e.m.f. will give the measure of temperature.\r\nApplication\r\n\r\n \tIt is used to measure the high temperature of 3500\u00b0C.\r\n\r\nAdvantages\r\n\r\n \tIt has high accuracy\r\n \tThere is no physical contact with the radiating object\r\n \tThe distance between radiating object and pyrometer is negligible\r\n\r\nDisadvantages\r\n1. It is not suitable for very low temperature measurement due to poor sensitivity.\r\n2. Dust, smoke, gases in between radiating object and instrument will cause error.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nManufacturing Technology Notes , Articles\r\nMechatronics System Notes , article , Interview Que and Ans\r\nRobotics and Automation - Notes , articles , Interview Que &amp; Ans\r\nMeasurement Science and Metrology Notes , Articles\r\nMeasurement Science and Metrology Notes , Articles\r\n\r\n\r\n\r\n&nbsp;","headline":"Total Radiation Pyrometer &#8211; Diagram , Working , Advantages","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/m.gunkrazy.com\/"},"datePublished":"2019-11-12","mainEntityOfPage":"False","dateModified":"February 18, 2020","image":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2019\/11\/total-radiation-pyrometer-diagram-300x258.jpg","height":258,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/m.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <nav class="pagination-wrapper" aria-label="article pagination"> <a class="prev page-numbers" href="?page_num=15">&laquo; PREV</a> <a class="page-numbers" href="?page_num=1"><span class="screen-reader-text">Page </span>1</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=14"><span class="screen-reader-text">Page </span>14</a> <a class="page-numbers" href="?page_num=15"><span class="screen-reader-text">Page </span>15</a> <span aria-current="page" class="page-numbers current"><span class="screen-reader-text">Page </span>16</span> <a class="page-numbers" href="?page_num=17"><span class="screen-reader-text">Page </span>17</a> <a class="page-numbers" href="?page_num=18"><span class="screen-reader-text">Page </span>18</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=338"><span class="screen-reader-text">Page </span>338</a> <a class="next page-numbers" href="?page_num=17">NEXT &raquo;</a></nav></section></main><aside id="secondary" class="widget-area"><div class="about-wrapper"><h2 class="widget-title" style="background: #d693c6; color: #ff392e">About Us</h2><div class="about-image" style="background-image: url('//m.gunkrazy.com/wp-content/uploads/2020/03/Sachin-Thorat-300x300-min.png')"></div><p class="about-copy">LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. 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