clutches

Question 1

A jaw clutch is essentially a

Answer 1

positive action clutch

Question 2

The material used for lining of friction surfaces of a clutch should have ______ coefficient of friction.

Answer 2

high

Question 3

The torque developed by a disc clutch is given by

where
W = Axial force with which the friction surfaces are held together;
μ = Coefficient of friction; and
R = Mean radius of friction surfaces.

Answer 3

T=μ.W.R

Question 4

In case of a multiple disc clutch, if n1 are the number of discs on the driving shaft and n2 are the number of the discs on the driven shaft, then the number of pairs of contact surfaces will be

Answer 4

n1+n2-1

Question 5

The cone clutches have become obsolete because of

Answer 5

all of these

Question 6

The axial force (We) required for engaging a cone clutch is given by

where
Wn = Normal force acting on the contact surfaces,
α = Face angle of the cone, and
μ = Coefficient of friction.

Answer 6

We = Wn(sinα+0.25μcosα)

Question 7

In a centrifugal clutch, the force with which the shoe presses against the driven member is the ______ of the centrifugal force and the spring force.

Answer 7

difference