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Mechanical Engineering Practice Questions
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Mechanical Engineering Practice Questions
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1. A link OP is 0.5 m longand rotate about point O. Ithas a slider at permit B.Centripetal acceleration of Prelative to O is 8 m/sec2. Thesliding velocity of sliderrelative to P is 2 m/ sec. Themagnitude of Corioliscomponent of acceleration is
2. A hole is specified as0.050 0.000 40 mm. Themating shaft has a clearancefit with minimum clearance of0.01mm. The tolerance on theshaft is 0.04 mm. Themaximum clearance in mmbetween the hole and theshaft is
3. Which of the following isthe correct way of designatingfit?
4. The number of strainreadings (using strain gauges)needed on a plane surface todetermine th principal strainsand their directions is
5. A ring gauge is used tomeasure
6. A solid disc of radius rrolls without slipping on ahorizontal floor with angularvelocity w and angularacceleration a. The magnitudeof the acceleration of the pointof contact on the disc is
7. The measurement ofthermodynamic propertyknown as temperature - isbased on
8. Viscosity of a fluid withspecific gravity 1.3 ismeasured to be 0.0034 Ns/m2.Its kinematic viscosity - in m2/s - is
9. A body of 2 kg massmakes an elastic collision withanother body at rest andafterwards continues to movein the original direction butwith one-fourth of its originalspeed. The mass of the struckbody is
10. Maximum fluctuation ofenergy is the
11. Electrochemicalmachining is performed toremove material from an ironsurface of 20 mm × 20 mmunder the following conditionsIn for electrode gap = 0.2 mmSupply voltage DC = 12 VSpecific resistance of = 2Wcm electrolyte Atomic weightof iron = 55.85 Valency of iron= 2 Faraday-Ÿs constant =96500 C/ mol The materialremoval rate (in g/s) is
12. Arrange the processes inthe increasing order of theirmaximum material removalrate: Electrochemicalmachinig (ECM) Ultrasonicmachining (USM) Electronbeam machining (EBM) Laserbeam machining (LBM)Electric discharge machining(EDM)
13. A circular disc ofdiameter -žd-Ÿ is slowly rotatedin a liquid of large viscosity mat a small distance h from afixed surface. The minimumtorque required to maintainan angular velocity w will be
14. In orthogonal turning ofmedium carbon steel-Ÿ thespecific machining energy is2.0 J/mm3. The cuttingvelocity - feed and depth of cutare 120m/rev min - 0.2 mm - respectively. The main cuttingforce in N is
15. Thermal boundary layeris a region where
16. Find the wrong statementamong the following
17. Reduction of stressconcentration is achieved by
18. Mobility of a staticallyindeterminate structure is
19. Hexa methylene tetramineis added to the resin sand asa
20. Response is defined asthe measure of a system isfidelity to purpose. Theresponse of measuringinstrument may be consideredto the following cases.
21. The casting process bywhich hollow castingproduced without using coreis known as
22. For the givenstatements: I. Mating spurgear teeth is an example ofhigher pair. II. A revolute jointis an example of lower pair.Indicate the correct answer.
23. Which of the followingkey is under compressionrather than in being shearwhen under load?
24. Hexa methylene tetramineis added to the resin sand asa
25. Two objects havingmasses of 5 kg and 10 kghave initial velocities of 2m/sec in the +x direction and1 m/sec in the +y directionrespectively. After collisionthey stick together and moveat an angle of 45° to the xaxis. Their combined finalvelocity is

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