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CHAIN DRIVE Multiple choice Questions :-
1. A chain can be defined as a series of links connected by
(A) Pin joints
(B) Riveted joints
(C) Ball joints
(D) Bolted joints
2. The chain drive is intermediate between
(A) Belt and rope drives
(B) Rope and gear drives
(C) Belt and gear drives
(D) None of the above
3. Following is true for chain drive
(A) The chain does not slip
(B) Chain drive is positive drive
(C) Chain drive does not require initial tension
(D) All of the above
4. Which of the following can be used for non-parallel shafts?
(A) Bevel gear
(B) Worm gear
(C) Quarter Turn belt drive
(D) All of the above
5. Chain drives are used in
(A) Bicycle
(B) Motorcycle
(C) Automobile
(D) All of the above
6. Chain drives are recommended to transmit power up to
(A) 25 kW
(B) 50 kW
(C) 100 kW
(D) 500 kW
7. Link chains are used in
(A) Low capacity hoists
(B) Winches
(C) Hand operated cranes
(D) All of the above
8. Following chain is (are) used for conveyor applications
(A) Block chains
(B) Roller chains
(C) Both (A) and (B)
(D) None of the above
9. Following is power transmission chain
(A) Block chains
(B) Roller chains
(C) Both (A) and (B)
(D) None of the above
10. Following is not a part of roller chain
(A) Bushing
(B) Inner link plate
(C) Center link plate
(D) Outer link plate
11. In roller chain, the bush and the pin form
(A) Ball joint
(B) Swivel joint
(C) Riveted joint
(D) None of the above
12. In roller chain, the rolling friction reduces
(A) Wear
(B) Frictional power loss
(C) Improves the efficiency of the chain drive
(D) All of the above
13. A chain is designated as 16A, its pitch is
(A) 8 mm
(B) 12.7mm
(C) 16mm
(D) 25.4mm
14. Braking load is defined as the maximum
(A) Shear load
(B) Compressive load
(C) Tensile load
(D) All of the above
15. The length of the chain (L) is expressed as
(A) Ln x p
(B) Ln x v
(C) Ln x n
(D) Ln x z
Where, Ln = number of links in the chain, p = pitch, v = linear velocity, z = number of teeth on sprocket, n = velocity in rpm
16. An additional link provided in the chain is called
(A) Offset link
(B) Substitute link
(C) Extra link
(D) None of the above
17. The power transmitted (P) in kW by the roller chain can be expressed by
(A) P1v/1000
(B) P1/1000 v
(C) v/1000 P1
(D) P1v x 1000
Where, P1 = Allowable tension, v = average velocity of chain (m/s)
18. The power rating of the roller chain is obtained on the basis of following failure criteria
(A) Wear
(B) Fatigue
(C) Impact
(D) All of the above
19. ___ is a stick slip phenomenon between the pin and the bushing.
(A) Wear
(B) Fatigue
(C) Galling
(D) Impact
20. For satisfactory performance of roller chains, the center distance between the sprockets should be provided at least a ___ wrap angle on the smaller sprocket.
(A) 60°
(B) 90°
(C) 120°
(D) 150°
21. Too loose a chain causes vibrations called
(A) Whirling
(B) Whipping
(C) Shaking
(D) None of the above
22. The minimum number of teeth on the driving sprocket is
(A) 7
(B) 17
(C) 27
(D) 37
23. The speed reduction of a single stage chain drive should not be more than
(A) 5:1
(B) 7:1
(C) 10:1
(D) 15:1
24. The expected service life of chains is
(A) 10,000 hrs
(B) 15,000 hrs
(C) 20,000 hrs
(D) 25,000 hrs
25. The efficiency of well lubricated chain drive is from
(A) 90% to 92%
(B) 92% to 94%
(C) 94% to 96%
(D) 96% to 98%
26. Following is ‘Type-A’ method of lubrication in chains
(A) Disk lubrication
(B) Drip lubrication
(C) Oil stream lubrication
(D) None of the above
27. The silent chain is also known as
(A) Inverted tooth chain
(B) Block chain
(C) Roller chain
(D) All of the above
28. Following is true for silent chain
(A) Used for high speed applications
(B) It is smooth and noiseless
(C)Expensive than roller chain
(D) All of the above
29. Following has polygonal effect
(A) Gear drive
(B) Belt drive
(C) Chain drive
(D) Rope drive
30. Following is a type of silent chain
(A) Reynolds chain
(B) Morse chain
(C) Both (A) and (B)
(D) Kinematic chain