mechanical engineering MCQs – Page 120

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 Review each marked answer and report any item that may be outdated or unclear.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

2381. The frequency of oscillation at compared to earth will be___________________?
0

A. 6 times less

B. 2.44 times more

C. 2.44 times,less

D. 6 times more

E. 36 times less

2382. A point on a link connecting double slider crank chain traces a____________________?
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A. parabola

B. circle

C. straight line

D. hyperbola

E. ellipse

2383. Transmission of power from the engine to the rear axle of an automobile is by means of___________________?
0

A. worm and wheel method

B. crown gear

C. bevel gears

D. Hookes joint

E. compound gears

2384. A cam mechanism imparts following motion___________________?
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A. all of the above

B. rotating

C. reciprocating

D. none of the above

E. oscillating

2385. Automobile steering gear is an example of____________________?
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A. turning pair

B. rotary pair

C. higher pair

D. lower pair

E. sliding pair

2386. The advantage of the piston valve over D-slide valve is that in the former case____________________?
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A. wear is less

B. power absorbed is less

C. both wear and power absorbed are low

D. the pressure developed being high provides tight sealing

E. there is overall economy of initial cost, maintenance and operation

2387. In above example, the minimum length of the coupler will be__________________?
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A. none of the above

B. slightly less than 45 mm

C. slightly more than 45 mm

D. 95 mm

E. 45 mm

2388. A typewriter mechanism has 7 number of binary joints, six links and none of higher pairs. The mechanism is________________?
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A. not sound

B. kinematically sound

C. soundness would depend upon which link is kept fixed

D. none of the above

E. data is not sufficient to determine same

2389. The following is the inversion of slider crank chain mechanism______________________?
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A. Whitworth quick return mechanism

B. hand pump

C. all of the above

D. oscillating cylinder engine

E. none of the above

2390. The indicator using Watt mechanism is known as________________?
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A. Thompson indicator

B. Richard indicator

C. none of the above

D. Simplex indicator

E. Thomson indicator

2391. Rectangular bar in a rectangular hole is the following type of pair__________________?
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A. incompletely constrained motion

B. freely constrained motion

C. completely constrained motion

D. partially constrained motion

E. none of the above

2392. The approximate straight line mechanism is a____________________?
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A. 8 bar linkage

B. 6 bar linkage

C. 3 bar linkage

D. four bar linkage

E. 5 bar linkage

2393. Angle of descent of cam is defined as the angle__________________?
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A. during which the follower returns to its initial position

B. through which the cam rotates during the period in which the follower remains in the highest position

C. moved by the cam from the instant the follower begins to rise, till it reaches its highest position

D. moved by the cam from beginning of ascent to the termination of descent

E. of rotation of the cam for a definite displacement of the follower

2394. The direction of Coriolis component of acceleration is the direction _____________________?
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A. along tangential acceleration

B. along the centripetal acceleration

C. along perpendicular to angular velocity

D. of relative velocity vector for the two coincident points rotated by 90 in the direction of the angular velocity of the rotation of the link

E. none of the above.

2395. Flexible coupling is used because _____________________?
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A. it increases shaft life

B. it is easy to disassemble

C. it is easy to engage and disengage

D. it transmits shocks gradually

E. it prevents shock transmission and eliminates stress reversals

2396. Which of the following mechanism is obtained from lower pair________________?
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A. valve and valve gears

B. pantograph

C. gyroscope

D. all of the above

E. generated straight line motions

2397. Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts__________________?
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A. kinematics

B. kinetics

C. applied mechanics

D. mechanisms

E. theory of machines

2398. Which of the following mechanisms produces mathematically an exact straight line motion____________________?
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A. Grasshopper mechanism

B. Tchabichiff mechanism

C. Peaucelliers mechanism

D. Watt mechanism

E. Ackermann mechanism

2399. Angle of action of cam is defined as the angle ____________________?
0

A. moved by the cam from the instant the follower begins to rise, till it reaches its highest position

B. moved by the cam from beginning of ascent to the termination of descent

C. of rotation of the cam for a definite displacement of the follower

D. through which the cam rotates during the period in which the follower remains in the highest position

E. during which the follower returns to its initial position

2400. Which of the following disciplines provides study of relative motion between the parts of a machine______________?
0

A. theory of machines

B. kinematics

C. mechanisms

D. applied mechanics

E. kinetics

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