Machine Kinematics

Advantages and Disadvantages of Chain Drive Over Belt or Rope Drive

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by
p = D sin(900/T)
p = D sin(1200/T)
p = D sin(1800/T)
p = D sin(3600/T)
Explanation:
None.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
The distance between the hinge centre of a link and the corresponding hinge centre of the adjacent link is called
pitch of the chain
bush roller chain
block chain
none of the mentioned
Explanation:
A bush roller chain, consists of outer plates or pin link plates, inner plates or roller link plates, pins, bushes and rollers.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Industrial rotors will not have uniform diameter throughout their lengths.
True
False
Explanation:
Industrial rotors are not uniform, because of fitment of pulleys, gears, belt etc.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The advantages of the V-belt drive over flat belt drive are
The V-belt drive gives compactness due to the small distance between the centres of pulleys.
The drive is positive, because the slip between the belt and the pulley groove is negligible.
Since the V-belts are made endless and there is no joint trouble, therefore the drive is smooth.
It provides longer life, 3 to 5 years.
Explanation:
Following are the advantages of the V-belt drive over flat belt drive:
Question 5
Marks : +2 | -2
Pass Ratio : 100%
For cutting multi-start threads, the speed ratio is expressed in terms of the lead of the job thread and lead of the lead screw threads.
True
False
Explanation:
During multi-start thread cutting operation, speed is reduced to one-third to one-fourth of that in turning operation.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which one of the following is a positive drive?
Crossed flat belt drive
Rope drive
V-belt drive
Chain drive
Explanation:
The chains are mostly used to transmit motion and power from one shaft to another, when the centre distance between their shafts is short such as in bicycles, motor cycles, agricultural machinery, conveyors, rolling mills, road rollers etc.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The advantages of the V-belt drive over flat belt drive are
The V-belt drive gives compactness due to the small distance between the centres of pulleys.
The drive is positive, because the slip between the belt and the pulley groove is negligible.
Since the V-belts are made endless and there is no joint trouble, therefore the drive is smooth.
It provides longer life, 3 to 5 years.
Explanation:
Following are the advantages of the V-belt drive over flat belt drive:
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The disadvantages of the V-belt drive over flat belt drive are
The V-belt drive cannot be used with large centre distances.
The V-belts are not so durable as flat belts.
The construction of pulleys for V-belts is more complicated than pulleys for flat belts.
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.
Explanation:
Following are the disadvantages of the V-belt drive over flat belt drive :
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The chain drive transmits ____________ power as compared to belt drive.
more
less
equal
none of the mentioned
Explanation:
Following are the advantages and disadvantages of chain drive over belt or rope drive:
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The disadvantages of the V-belt drive over flat belt drive are
The V-belt drive cannot be used with large centre distances.
The V-belts are not so durable as flat belts.
The construction of pulleys for V-belts is more complicated than pulleys for flat belts.
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.
Explanation:
Following are the disadvantages of the V-belt drive over flat belt drive :