Types of Belt Drives & Pulleys – MCQs
1. Which belt drive is used when shafts are parallel and rotate in same direction?
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A) Open belt drive
B) Cross belt drive
C) Quarter turn belt drive
D) Fast and loose pulley
✅ Answer: A) Open belt drive
Explanation: In open belt drive, shafts rotate in the same direction and are parallel.
2. In cross belt drive, the driven shaft rotates:
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A) Same direction
B) Opposite direction
C) Perpendicular direction
D) Random direction
✅ Answer: B) Opposite direction
Explanation: Cross belt arrangement reverses the direction of rotation.
3. Which belt drive is used when shafts are perpendicular?
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A) Open belt
B) Cross belt
C) Quarter turn belt
D) Compound belt
✅ Answer: C) Quarter turn belt
Explanation: Used when shafts are at 90° to each other.
4. The belt drive used to transmit power between distant shafts is:
(psssb je mechanical book with test series)
A) Stepped pulley drive
B) Fast and loose pulley
C) Compound drive
D) Simple belt drive
✅ Answer: C) Compound drive
Explanation: Compound drives use intermediate shafts for long distances.
5. Which pulley is used to change speed ratios?
(psssb je mechanical book with test series)
A) Flat pulley
B) Stepped pulley
C) Idler pulley
D) Guide pulley
✅ Answer: B) Stepped pulley
Explanation: Multiple diameters allow different speeds.
6. Fast and loose pulley is used for:
(psssb je mechanical book with test series)
A) Speed increase
B) Speed decrease
C) Engaging/disengaging machine
D) Power loss reduction
✅ Answer: C) Engaging/disengaging machine
Explanation: Allows machine to stop without stopping shaft.
7. Which pulley rotates freely on shaft?
(psssb je mechanical book with test series)
A) Fast pulley
B) Loose pulley
C) Stepped pulley
D) Cone pulley
✅ Answer: B) Loose pulley
Explanation: Loose pulley rotates independently of shaft.
8. Which belt drive provides maximum power transmission?
(psssb je mechanical book with test series)
A) Open
B) Cross
C) Quarter
D) Compound
✅ Answer: B) Cross
Explanation: Larger angle of contact increases grip.
9. Idler pulley is used to:
(psssb je mechanical book with test series)
A) Increase speed
B) Decrease speed
C) Increase angle of contact
D) Reduce friction
✅ Answer: C) Increase angle of contact
Explanation: Improves belt grip on pulley.
10. Which drive is used for small center distance?
(psssb je mechanical book with test series)
A) Cross belt
B) Open belt
C) Compound
D) Rope drive
✅ Answer: B) Open belt
Explanation: Suitable for moderate distances.
🔹 (Continue – More MCQs)
11. Rope drive is used for:
(psssb je mechanical book with test series)
A) Short distance
B) Medium distance
C) Long distance
D) No distance
✅ Answer: C) Long distance
Explanation: Rope drives transmit power over long distances.
12. Which pulley has a crowned surface?
(psssb je mechanical book with test series)
A) Flat pulley
B) V pulley
C) Rope pulley
D) Idler pulley
✅ Answer: A) Flat pulley
Explanation: Crown prevents belt slipping.
13. V-belt runs in:
(psssb je mechanical book with test series)
A) Flat groove
B) V groove
C) Circular groove
D) Square groove
✅ Answer: B) V groove
Explanation: Ensures better grip.
14. Which pulley reduces belt slip?
(psssb je mechanical book with test series)
A) Flat
B) V pulley
C) Loose pulley
D) Idler pulley
✅ Answer: B) V pulley
Explanation: Wedging action increases friction.
15. In stepped pulley drive, speed variation is achieved by:
(psssb je mechanical book with test series)
A) Changing belt length
B) Changing pulley diameter
C) Changing shaft
D) Changing load
✅ Answer: B) Changing pulley diameter
Explanation: Belt shifts between steps.
16. Which belt drive is used in lathe machines?
(psssb je mechanical book with test series)
A) Open
B) Cross
C) Stepped pulley
D) Rope
✅ Answer: C) Stepped pulley
17. Fast pulley is fixed to:
(psssb je mechanical book with test series)
A) Shaft
B) Belt
C) Frame
D) Gear
✅ Answer: A) Shaft
18. Which pulley is used to guide belt?
(psssb je mechanical book with test series)
A) Idler pulley
B) Fast pulley
C) Loose pulley
D) Step pulley
✅ Answer: A) Idler pulley
19. Which belt drive increases belt wear?
(psssb je mechanical book with test series)
A) Open
B) Cross
C) Rope
D) Stepped
✅ Answer: B) Cross
Explanation: Belt twists causing wear.
20. Quarter turn drive requires:
(psssb je mechanical book with test series)
A) Guide pulley
B) Idler pulley
C) Both A & B
D) None
✅ Answer: C) Both A & B
🔹 (More Important MCQs)
21. Cone pulley is another name of:
(psssb je mechanical book with test series)
A) Flat pulley
B) Stepped pulley
C) Idler pulley
D) Fast pulley
✅ Answer: B) Stepped pulley
22. Belt slip reduces:
(psssb je mechanical book with test series)
A) Efficiency
B) Speed
C) Power
D) All of the above
✅ Answer: D) All of the above
23. Which belt drive is most efficient?
(psssb je mechanical book with test series)
A) Open
B) Cross
C) Rope
D) Chain
✅ Answer: A) Open
24. Groove angle in V-belt is approximately:
(psssb je mechanical book with test series)
A) 20°
B) 30°
C) 40°
D) 60°
✅ Answer: C) 40°
25. Belt creep is caused due to:
(psssb je mechanical book with test series)
A) Friction
B) Elasticity
C) Speed
D) Load
✅ Answer: B) Elasticity
🔹 (Final Set)
26. Rope drives use:
(psssb je mechanical book with test series)
A) Flat belt
B) Round rope
C) Chain
D) Wire
✅ Answer: B) Round rope
27. Maximum efficiency occurs when tension ratio is:
(psssb je mechanical book with test series)
A) High
B) Low
C) Equal
D) Optimum
✅ Answer: D) Optimum
28. Which pulley is used for alignment correction?
(psssb je mechanical book with test series)
A) Idler pulley
B) Fast pulley
C) Loose pulley
D) Step pulley
✅ Answer: A) Idler pulley
29. Open belt drive has angle of contact less than:
(psssb je mechanical book with test series)
A) 90°
B) 120°
C) 180°
D) 360°
✅ Answer: C) 180°
30. Cross belt drive angle of contact is:
(psssb je mechanical book with test series)
A) Less
B) Equal
C) Greater
D) Zero
✅ Answer: C) Greater