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From the list given, identify the features that belong to flat-belt drive and V-belt drive.

I. It has a trapezoidal cross-section.

II. The belt is hinged

III. It is used for long-distance power transmission

IV. It is comparatively expensive


1.

Flat-belt drive - II and III

V-belt drive - I and IV


2.

Flat-belt drive - I and III

V-belt drive - II and IV


3.

Flat-belt drive - II and IV

V-belt drive - I and III


4.

Flat-belt drive - I and IV

V-belt drive - II and III

1 Answer

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Best answer
Correct Answer - Option 1 :

Flat-belt drive - II and III

V-belt drive - I and IV


Explanation: 

  • The V-belts are made of fabric and cords moulded-in rubber and covered with fabric and rubber.
  • These belts are moulded into a trapezoidal shape and are made endless.
  • These are particularly suitable for short drives.
  • A small groove angle will require more force to pull the belt out of the groove which will result in loss of power and excessive belt wear due to friction and heat. Hence the selected groove angle is a compromise between the two. Usually, the groove angles of 32° to 38° are used.
  • The groove angle of the sleeve is less than the belt section angle and the groove angle is so made that the belt gets wedged in the groove

Comparison between the flat belt and V-belt is given below:

S.No.

Flat Belt

V-Belt

1

They do not require precise alignment of shaft and pulley

They require precise alignment of shaft and pulley.

2

It can be used in industry and abrasive atmosphere

It can not be used in industry and abrasive atmosphere

3

Design is simple and inexpensive

Design is difficult and expensive

4

It can be used for long-distance up to 15 m.

It is used for a short distance

5

Efficiency is more than V-belt

Efficiency is less than a flat belt

6

Capacity is less

Capacity is more

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