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Mechanical Engineering Practice Questions
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Mechanical Engineering Practice Questions
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25 Questions

1. On heat transfer surface - fins are provided.
2. For a four bar linkage intoggle position - the value ofmechanical advantage is
3. In full depth 1/4 degreeinvolute system - the smallestnumber of teeth in a pinionwhich meshes with rackwithout interference is
4. In a slider-barmechanism - when does theconnecting rod have zeroangular velocity?
5. Thermal boundary layeris a region where
6. If a closed system isundergoing an irreversibleprocess - the entropy of thesystem
7. In a slider-barmechanism - when does theconnecting rod have zeroangular velocity?
8. A flapper nozzles is usedin
9. Tool signature comprisedof
10. Which thermometer isindependent of the substanceor material used inconstructions?
11. A circular solid disc ofuniform thickness 20 mm - radius 200 mm and mass 20kg - is used as a flywheel. If itrotates at 600 rpm - the kineticenergy of the flywheel - inJoules is
12. Hexa methylenetetramine is added to theresin sand as a
13. A circular solid disc ofuniform thickness 20 mm - radius 200 mm and mass 20kg - is used as a flywheel. If itrotates at 600 rpm - the kineticenergy of the flywheel - inJoules is
14. The buckling load in asteel column is
15. An isolated system is one - which
16. In orthogonal turning of alow carbon steel bar ofdiameter 150 mm withuncoated carbide tool - thecutting velocity is 90 m/min.The feed is 0.24 mm/rev andthe depth of cut is 2 mm. Thechip thickness obtained is0.48 mm. If the orthogonalrake angle is zero - and theprincipal cutting edge angle is90o - the shear angle indegrees is
17. Reduction of stressconcentration is achieved by
18. A ring gauge is used tomeasure
19. Diesel cycle consists of
20. A refrigerating machineworking on reversed Carnotcycle takes out 2 kW perminute of heat from thesystem while betweentemperature limits of 300 Kand 200 K. COP and Powerconsumed by the cycle will berespectively:
21. Scale sensitivity isdefined as
22. For a turbulent flow inpipe the value of y at whichthe point velocity is equal tothe mean velocity of flow - is (yis measured form pipe axis).
23. In a four-bar linkage - Sdenotes the shortest linklength - L is the longest linklength - P and Q are thelengths of other two links. Atleast one of the three movinglinks will rotate by 360° if
24. In a stressed body - anelementary cube of material istaken at a point with its facesperpendicular to X and Yreference axes. Tensilestresses equal to 15 kN/cm2and 9 kN/cm2 are observed ontheses respective faces. Theyare also accompanied byshear equal to 4 kN/cm2. Themagnitude of the principalstresses at the point are
25. A mass of 1 kg isattached to the middle of arope - which is being pulledfrom both ends in theopposite directions. Taking g =10 m/sec2 - the minimum pullrequired to completelystraighten the rope will be

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