mechanical engineering MCQs – Page 121

Practise multiple-choice questions from mechanical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

mechanical engineering Mcqs

1. compressors gas turbines and jet engines 2. theory of machines 3. nuclear power plants 4. engineering materials 5. strength of materials mechanical engineering 6. thermodynamics 7. heat transfer 8. i c engines 9. steam boilers engines nozzles and turbines 10. engineering mechanics 11. fluid mechanics mechanical engineering 12. production technology 13. machine design 14. hydraulic machines 15. workshop technology 16. refrigeration and air conditioning

2401. The example of rolling pair is________________?
0

A. bolt and nut

B. ball and socket joint

C. all of the above

D. lead screw of a lathe

E. ball bearing and roller bearing

2402. Oldhams coupling is the ____________________?
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A. second inversion of single slider crank chain

B. fourth inversion of double slider crank chain

C. third inversion of slider crank chain

D. second inversion of double slider crank chain

E. third inversion of double slider crank chain

2403. If the opposite links of a four bar linkage are equal, the links will always form a_________________?
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A. triangle

B. parallelogram

C. rectangle

D. pentagon

E. trapezoid

2404. For a kinematic chain to be considered as mechanism___________________?
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A. none of the above

B. none of the links should be fixed

C. two links should be fixed

D. there is no such criterion

E. one link should be fixed

2405. Creep in belt drive is due to____________________?
0

A. uneven extensions and contractions due to varying tension

B. larger size of the driver pulley

C. material of the pulley

D. material of the belt

E. expansion of belt

2406. Davis steering gear consists of__________________?
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A. higher pairs

B. lower pairs

C. rolling pairs

D. sliding pairs

E. turning pairs

2407. When a ship travels in a sea, which of the effect is more dangerous___________________?
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A. none of the above

B. pitching

C. rolling

D. steering

E. all of the above

2408. Kinematic pairs are those which have two elements that ______________?
0

A. have surface contact

B. are held together

C. have line contact

D. have dynamic forces

E. permit relative motion

2409. Idler pulley is used___________________?
0

A. for applying tension

B. all of the above

C. none of the above

D. for increasing -velocity ratio

E. for changing the direction of motion of the belt

2410. Whitworth quick return mechanism is obtained by inversion of___________________?
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A. five link mechanism

B. slider crank mechanism

C. none of the above

D. roller cam mechanism

E. kinematic chain

2411. If there are L number of links in a mechanism then number of possible inversions is equal to_______________?
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A. L 2

B. L + 1

C. L 1

D. L

E. L + 2

2412. The pressure angle of a cam depends upon___________________?
0

A. lift of follower

B. angle of ascent

C. all of the above

D. sum of radii of base circle and roller follower

E. offset between centre lines of cam and follower

2413. For fluctuating loads, welsuited bearing is_________________?
0

A. thrust bearing

B. roller bearing

C. needle roller bearing

D. sleeve bearing

E. ball bearing

2414. In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed_______________?
0

A. none of the above

B. Wilson Hartnell governor

C. Hartung governor

D. Pickering governor

E. Inertia governor

2415. The example of spherical pair is_____________________?
0

A. ball and socket joint

B. ball bearing and roller bearing

C. none of the above

D. bolt and nut

E. lead screw of a lathe

2416. A mechanism is an assemblage of ____________________?
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A. two links

B. four links or more than four links

C. all of the above

D. none of the above

E. three links

2417. The moment on the pulley which produces rotation is called ___________________?
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A. moment of momentum

B. momentum

C. inertia

D. work

E. torque

2418. Kleins construction can be used to determine acceleration of various parts when the crank is at_________________?
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A. inner dead centre

B. outer dead centre

C. all of the above

D. right angles to the link of the stroke

E. at 45 to the line of the stroke

2419. If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be_______________?
0

A. same

B. none of the above

C. less

D. data are insufficient to determine same

E. more

2420. The lower pair is a_____________________?
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A. point contact pair

B. does not exist

C. closed pair

D. open pair

E. sliding pair

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