Belt, Rope and Chain Drives topics include: Belt, rope and chain drives, belt types and pulleys.  Belt, rope, and chain drives are all mechanical power transmission systems that use pulleys to transmit power from one shaft to another.  The amount of power transmitted depends on the following factors: The velocity of the belt The coefficient of friction The angle of contact  Here's some more information about these types of drives: Belt drives: Use pulleys and a flexible belt to transmit power. Belts are made from leather, cotton, rubber, and synthetic materials. Belt drives are... Show more

Belt, Rope and Chain Drives topics include: Belt, rope and chain drives, belt types and pulleys. 

Belt, rope, and chain drives are all mechanical power transmission systems that use pulleys to transmit power from one shaft to another. 
The amount of power transmitted depends on the following factors:
The velocity of the belt
The coefficient of friction
The angle of contact 

Here's some more information about these types of drives:
Belt drives: Use pulleys and a flexible belt to transmit power. Belts are made from leather, cotton, rubber, and synthetic materials. Belt drives are preferred for medium to large center distances. They have a lower noise level and require minimum maintenance.
Rope drives: Use a rope to transmit power from one system to another. Rope drives are a form of belt drive.
Chain drives: Use a chain to transmit power. Chain drives are often used in equipment like industrial machinery, heavy machinery, and motorbikes where high power transmission is necessary. Chain drives have a higher noise level and require regular maintenance. 

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Machine Kinematics Practice Test: Belt, Rope and Chain Drives

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25 Questions

1. The centrifugal tension on the belt has no effect on the power transmitted.

FalseTrueMaybeDon't Know

2. In a multiple V-belt drive, if one of the belt is broken, then we should replace

none of thesethe broken belt and the belts on either side of itthe broken belt onlyall the belts

3. Two pulleys of diameters d₁ and d₂ and at distance x apart are connected by means of an open belt drive. The length of the belt is

π /2 (d1 + d2) 2x + (d1 + d2)2/4xπ /2 (d1 + d2) 2x + (d1 – d2)2/4xπ /2 (d1 – d2) 2x + (d1 – d2)2/4xπ /2 (d1 – d2) 2x + (d1 + d2)2/4x

4. The disadvantages of the V-belt drive over flat belt drive are

The construction of pulleys for V-belts is more complicated than pulleys for flat belts.all of theseThe V-belt drive cannot be used with large centre distances.The V-belts are not so durable as flat belts.

5. The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by

p = D sin(3600/T)p = D sin(900/T)p = D sin(1200/T)p = D sin(1800/T)

6. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then

open belt drive is recommendedthe drive is recommended depending upon the torque transmittedboth open belt drive and cross belt drive are recommendedcross belt drive is recommended

7. Which of the following statements are correct regarding power transmission through V-belts?
(i) V-belts are used at the high-speed end.
(ii) V-belts are used at the low-speed end.
(iii) V-belts are of standard lengths.
(iv) V-angles of pulleys and belts are standardized.
Select the correct answer using the code given below.

2 and 4 only1, 3 and 42, 3 and 41 and 3 only

8. The groove angle of the pulley for V-belt drive is usually

25° – 32°32° – 38°38° – 45°20° – 25°

9. In the figure given below, what the quantity ‘p’ is known as _________

PitchSprocket lengthSprocker diameterPitch circle diameter

10. In design of arms of a pulley, in belt drive, the cross-section of the arm is elliptical with minor axis placed along the plane of rotation.

TrueFalseDon't KnowMaybe

11. The velocity ratio of two pulleys connected by an open belt or crossed belt is

directly proportional to their diametersdirectly proportional to the square of their diametersinversely proportional to their diametersinversely proportional to the square of their diameters

12. In a multiple V- belt drive, when a single belt is damaged, it is preferable to change the complete set to

reduce vibrationreduce slipensure proper alignmentensure uniform loading

13. Industrial rotors will not have uniform diameter throughout their lengths.

MaybeDon't KnowTrueFalse

14. Which of the following chain is used to provide elevation continuosly?

Hauling chainsHoisting chainsConveyor chainsPower transmitting chains

15. The included angle for the V-belt is usually

30° – 40°60° – 80°20° – 30°40° – 60°

16. The V-belts are particularly suitable for _____________ drives.

mediumshortnone of theselong

17. Five pulleys are arranged in the second system of pulleys. When not loaded the effort required to raise the movable block is 35N. Further wastage in friction increases the pull at the rate of 3% of the load lifted. What is the effort required to raise a load of 2kN?

none of these400 N495 N500 N

18. The diameter of the circle on which the hinge centres of the chain lie is known as _______

PitchSprocker diameter.Pitch circle diameterSprocket length

19. If the angle of wrap on smaller pulley of diameter 250 mm is 120⁰ and diameter of larger pulley is twice the diameter of smaller pulley, then the centre distance between the pulleys for an open belt drive is

500 mm250 mm1000 mm750 mm

20. The creep in a belt drive is due to the

unequal size of the pulleysmaterial of the beltunequal tension in tight and slack sides of the beltmaterial of the pulleys

21. The distance between hinge centres of two corresponding links is known as _______

PitchSprocker diameterPitch circle diameterSprocket length

22. Four movable pulleys are arranged as in the first system. If the weight of each pulley is 5 N, calculate the effort which can lift a load of 10 kN.

625 Nnone of these629.7 N615 N

23. The disadvantages of the V-belt drive over flat belt drive are

Since the V-belts are subjected to certain amount of creep, therefore these are not suitable for constant speed application such as synchronous machines, and timing devices.The belt life is greatly influenced with temperature changes, improper belt tension and mismatching of belt lengths.The centrifugal tension prevents the use of V-belts at speeds below 5 m/s and above 50m/s.all of these

24. Which of the following is true regarding chain drives?

The production cost of chains is relatively lowThe chain drive needs low maintenanceThe chain drive has no velocity fluctuationsThe chain drives may be used when the distance between the shafts is less

25. A pulley is connected to a power transmission shaft of diameter d by means of a rectangular sunk key of width w and length l. The width of the key is taken as d/4. For full power transmission, the shearing strength of the key is equal to the torsional shearing strength of the shaft. The ratio of the length of the key to the diameter of the shaft (l/d) is

пп/4п/2п/6