In a horizontal flat belt drive, it is customary to use

A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

A

Remain horizontal

B

Slant up towards direction of pull

C

Slant down towards direction of pull

D

None of the above

You are about to install a second IDE hard drive in a PC that has only one IDE adapter. Your first hard drive will still be the boot drive. How should the second drive be configured?

A

as a master

B

as a secondary

C

as a slave

D

as a primary

E

as auto-select

The ratio of driving tensions in V-belt drives is __________ flat belt drives.

A

Equal to

B

sin$$\,\alpha $$ times more than

C

sin$$\,\alpha $$ times less than

D

cosec$$\,\alpha $$ times more than

A pulley and belt in a belt drive form a

A

Cylindrical pair

B

Turning pair

C

Rolling pair

D

Sliding pair

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

A

Reduce vibration

B

Reduce slip

C

Ensure uniform loading

D

Ensure proper alignment

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

A

Reduce vibration

B

Reduce slip

C

Ensure uniform loading

D

Ensure proper alignment

In V-belt drive, belt touches

A

At bottom

B

At sides only

C

Both at bottom and sides

D

Could touch anywhere

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

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

The objective of 'crowning' of the flat pulleys of belt drive is to

A

Prevent the belt from running off the pulley

B

Increase the power transmission capacity

C

Increase the belt velocity

D

Prevent the belt joint from damaging the belt surface

In a horizontal flat belt drive, it is customary to use

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