The width of the pulley should be __________ width of the belt.

In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be

A

Increase key length

B

Increase key depth

C

Increase key width

D

Double all the dimensions

For same pulley diameters, center distance, belt speed and belt and pulley materials,

A

Open belt drive transmits more power than crossed belt drive

B

Crossed belt drive transmits more power than open belt drive

C

Open and crossed belt drives transmit same power

D

Power transmission does not depend upon open and crossed types of constructions

In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

A

Increase the key length

B

Increase the key depth

C

Increase the key width

D

Decrease the key length

A pulley and belt in a belt drive form a

A

Cylindrical pair

B

Turning pair

C

Rolling pair

D

Sliding pair

The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

A

$$\frac{{\text{D}}}{{{\text{D}} - {\text{d}}}}$$

B

$$\frac{{\text{D}}}{{{\text{D}} + {\text{d}}}}$$

C

$$\frac{{2{\text{D}}}}{{{\text{D}} - {\text{d}}}}$$

D

$$\frac{{2{\text{D}}}}{{{\text{D}} + {\text{d}}}}$$

Pulley in a belt drive acts as

A

cylindrical pair

B

turning pair

C

rolling pair

D

sliding pair

When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

A

Smaller

B

Larger

C

Either A or B

D

None of these

The objective of idler pulley in belt drive is to

A

Decrease the tendency of belt to slip

B

Increase the power transmission capacity

C

Increase the wrap angle and belt tension

D

All the above objectives

The coefficient of friction between the belt and pulley depends upon the

A

Material of belt and pulley

B

Slip of belt

C

Speed of belt

D

All of these

The timing belt is attached to the camshaft pulley and

A

Timing belt drive pulley

B

Distributor

C

Radiator fan pulley

D

Alternator pulley

The width of the pulley should be __________ width of the belt.

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