# Test: Friction Clutches - 2

## 10 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering | Test: Friction Clutches - 2

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Attempt Test: Friction Clutches - 2 | 10 questions in 30 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Topicwise Question Bank for Mechanical Engineering for Mechanical Engineering Exam | Download free PDF with solutions
QUESTION: 1

### A plate clutch consists of one pair of contacting surfaces. The inner and outer diameter of the friction disk are 100 and 200 mm respectively. The coefficient of friction is 0.2 and the permissible intensity of pressure is 1 N/mm2. Assuming, uniform wear theory, what is the operating force?

Solution:

Operating force,

[Pa = Permissible pressure intensity]

QUESTION: 2

Solution:
QUESTION: 3

### In a multi disc clutch, the recommended number of clutch discs for applications requiring the starting of load from rest is limited to

Solution:
QUESTION: 4

The ratio of inner to outer radii of a clutch is normally taken between

Solution:

If equal importance is given to durability and torsional moment output, (r1/r2) is taken as 0.48. In practice, (r1/r2) is usually kept between 0.6 and 0.7.

QUESTION: 5

Which is not the advantage of wet friction clutch?

Solution:

• The we friction is about one-third of dry friction clutch.
• The torque capacity of dry clutch is more as compared with the torque capacity of wet clutch of the same dimensions.
• In wet clutches, the lubricating oil carries away the frictional heat.

QUESTION: 6

For a cone clutch utilizing leather to asbestos lining, the recommended semi-cone angle is

Solution:
QUESTION: 7

All of the following statements are correct, except

Solution:
QUESTION: 8

Which one of the following is not a friction clutch

Solution:

Jaw clutch is positive clutch, Jaw clutch has no slip, no heat generation.

QUESTION: 9

In a multiple disc clutch nand n2 are the number of discs on the driving and driven shafts respectively. The number of pair of contact surfaces will be

Solution:

Number of pair in contact = n1 + n2 - 1

QUESTION: 10

On the motors with low starting torque, the type of the clutch to be used is

Solution:

Centrifugal clutch is used where low starting torque is required.
Centrifugal clutch is used practically in mopeds.

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