Kinematics and Theory of Machines (3131906) MCQs

MCQs of Friction, Clutch and Brake

Showing 61 to 70 out of 77 Questions
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61.

If the bearings are new and the fit between the shaft and bearing surface is perfect, it is safe to assume ___________.

(a)

uniform pressure theory
(b)

uniform wear theory
(c)

varying pressure theory
(d)

varying wear theory
Answer:

Option (a)

62.

If the bearings become old and the bearing surface is worn out, it is safe to assume ___________.

(a)

uniform pressure theory
(b)

uniform wear theory
(c)

varying pressure theory
(d)

varying wear theory
Answer:

Option (b)

63.

The sliding blocks are kept in position by means of _____ springs in a centrifugal clutch.

(a)

helical
(b)

flat
(c)

leaf
(d)

torsional
Answer:

Option (b)

64.

In automobile applications, the brake absorbs the ______ energy of moving vehicles.

(a)

radiant
(b)

thermal
(c)

kinetic
(d)

potential
Answer:

Option (c)

65.

In hoists and elevators, the brake absorbs the ______ energy released by the object during the braking period.

(a)

radiant
(b)

thermal
(c)

kinetic
(d)

potential
Answer:

Option (d)

66.

From the following, which is not a mechanical brake?

(a)

Block and band brake
(b)

Internal shoe brake
(c)

External shoe brake
(d)

Hysteresis brake
Answer:

Option (d)

67.

From the following, which is not an electric brake?

(a)

Eddy current brake
(b)

Hysteresis brake
(c)

Internal shoe brake
(d)

Magnetic particle brake
Answer:

Option (c)

68.

Which of the following is not true regarding braking capacity?

(a)

Brake capacity depends upon the unit pressure between the braking surface
(b)

Brake capacity depends upon the contacting area of the braking surface
(c)

Brake capacity depends upon the radius of the brake drum
(d)

Brake capacity does not depend upon the contacting area of the braking surface
Answer:

Option (d)

69.

In shoe brakes, the material used to make the shoes is ________ the material of the drum.

(a)

softer than
(b)

harder than
(c)

similar to
(d)

not related to
Answer:

Option (a)

70.

The effectiveness of the force applied at the lever end does not depend upon ________.

(a)

the radius of the drum
(b)

the direction of rotation of the drum
(c)

the ratio of length a and b from the pivot
(d)

the direction of the applied force
Answer:

Option (a)

Showing 61 to 70 out of 77 Questions
4 5 6 7 8