Power Transmission Devices MCQs In Mechanical With Answers Part 5.
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1. Following is not an example of power transimission device
A. gear pairs
B. belt
C. chain
D. bearing
Ans. D
2. In belt pulley power is transmitted from driving pulley to driven pulley because of
A. mass of belt
B. surface area of belt
C. friction between belt and pulley
D. all of the above
Ans. C
3. Flat belts are made of
A. leather
B. polyamide
C. polyester
D. all of above
Ans. D
4. The polygon effect is related to
A. spur gear
B. chain drive
C. belt drive
D. both A. and B.
Ans. B
5. The driving and driven wheels of chain drive are called as
A. rollers
B. pulleys
C. sheaves
D. sprockets
Ans. D
6. The chains are made of
A. steel
B. polyamide
C. leather
D. none of the above
Ans. A
7. The chains are made of number of rigid links connected by
A. pin joints
B. bolted joints
C. welded joints
D. none of the above
Ans. A
8. The silent chain is known as
A. inverted tooth chain
B. involute tooth chain
C. roller chain
D. sprocket chain
Ans. A
9. Which of following drives is used for high speed applications
A. roller chain
B. inverted tooth chain
C. flat belt drive
D. V-belt drive
Ans. B
10. Which of following drives need lubricant
A. chain drive
B. V-belt drive
C. flat belt drive
D. Both A. and B.
Ans. A
11. The drive does not need initial tension,Then it must be a
A. chain drive
B. Rope drive
C. belt drive
D. both A. and B.
Ans. A
12. The gear tooth profile is
A. parabolic
B. involute
C. cycloidal
D. both B. or C.
Ans. D
13. In a spur gear chain, when power torque is reduced form input shaft to output shaft
A. power is reduced
B. power is increased
C. power remains unchanged
D. power depends on speed change
Ans. C
14. Gear drive is used when distance between 2 shafts is____
A. Long
B. Very short
C. Very long
D. None of the above
Ans. B
15. Gear ratio is defined as___
A. np/ng
B. dg/dp
C. Zg/Zp
D. All of the above
Ans. D
16. Gear ratio is defined as ratio of ___speed
A. gear to pinion
B. pinion to pinion
C. pinion to gear
D. All of the above
Ans. C
17. Spur gear can be made of___
A. Plastic
B. brass
C. aluminium
D. steel
Ans. D
18. Teeths of spur gears are cut___
A. Perpendicular to axis of gear
B. inclined to axis of gear
C. along the curve
D. Parallel to axis of gear
Ans. D
19. Spur gears are___
A. Easy to manufacture
B. Less expensive
C. made in variety of size
D. all of the above
Ans. D
20. In precision machines or mechanism definite speed ratio is obtained by___drive
A. Gear
B. chain
C. belt
D. all of the above
Ans. A
21. Chains are made of ___
A. Leather
B. steel
C. plastic
D. copper
Ans. B
22. For effective functioning of chain drive___ is required
A. Cleaning
B. maintenance
C. Lubrication
D. covering
Ans. C
23. The chains are made up of number of rigid links which are hinged together by means of pin joint to provide ___ around the wheel
A. Rigidity
B. connectivity
C. Flexibility
D. all of the above
Ans. C
24. ____ are more noisy at higher operating speeds
A. rectangular belts
B. Circular belts
C. v-belts
D. Flat belts
Ans. D
25. ___ drive provide increased frictional contact between belt and pulley
A. Open belt
B. Crossed belt
C. Open belt with idler pulley
D. None of the above
Ans. B
26. In ------- drive there is more wear of belt
A. Open belt drive
B. Crossed belt drive
C. Open belt with idler pulley
D. None of these
Ans. B
27. --------- drive provides high reduction ratio
A. open belt
B. crossed belt
C. open belt with idler pulley
D. compound belt
Ans. D
27. The links of hoisting chains are of ------- shape
A. oval
B. square
C. oval or square
D. none of these
Ans. C
28. Gear drive is used when the distance between the driver & follower is -----
A. long
B. small
C. very long
D. none of these
Ans. B
29. Both the gears which are engaged, always rotate in ----------- direction
A. same
B. opposite
C. same or opposite
D. none of these
Ans. B
30. Spur gears are not used for
A. low speed applications
B. moderate speed applications
C. very low speed applications
D. high speed applications
Ans. D
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