# MCQs on Band Brakes & Disk Brakes

1 - Question

In both simple band brake and differential band brake, at least one end of the band passes through fulcrum.

a) Both the ends
b) Neither end
c) One end
d) None of the listed

Explanation: In differential, neither end of the brake passes through fulcrum.

2 - Question

Is it possible to prevent back rotation of drum?

a) Yes by using back stop brake
b) No
c) Depends on the angular velocity
d) Only in some specific cases

Explanation: Back stop brake can be used to prevent rotation of drum.

3 - Question

A self-locking differential brake and back stop brakes is same thing.

a) True
b) False

Explanation: Back stop brake is other name of self locking differential brake.

4 - Question

Band brake has complex construction with large number of parts.

a) Yes
b) It has simple construction
c) It has simple constructions but large number of parts
d) It has complicated construction but small number of parts

Explanation: Band brake has simple construction with small number of parts.

5 - Question

Band brakes require _____ maintenance.

a) Little
b) Zero
c) Much
d) None of the listed

Explanation: There is relatively less maintenance required as there are small number of parts and hence chances of brake going out of order is less.

6 - Question

The wear of band brake is even.

a) True
b) False

Explanation: There is uneven wear from one side to other side of the friction lining.

7 - Question

Calculate the braking torque if tension in the two sides is 3500N and 1980N with radius of drum being 160mm.

a) None of the mentioned
b) 243.20N-m
c) 223.4N-m
d) 278.6N-m

Explanation: Braking torque=(3500-1980)x160/1000.

8 - Question

Disk brakes have low torque transmitting capacity in high volumes.

a) True
b) False

Explanation: They have high torque transmitting capacity in low volumes.

9 - Question

In drum brakes, as the temperature increases coefficient of friction ______

a) increases
b) decreases
c) remains same
d) Can’t be determined

Explanation: Coeffecient of friction varies inversely with the temperature.

10 - Question

Loss of torque transmitting capacity at high temperatures is called

b) Rolling
c) Drifting
d) Planking

Explanation: Terminology.

11 - Question

Disk brakes largely suffer from the problem of self-locking.

a) Yes
b) No
c) Self-locking but it depends on radius of the wheel rotating
d) Material dependent

Explanation: There is no problem of self-locking in disk brakes.

12 - Question

Disk brakes can be used for opposite rotation of disk also.

a) No they are effective for one direction of motion only
b) They can be used
c) Poor efficiency in opposite direction
d) None of the listed

Explanation: Disk brakes are equally effective for both direction of motion.

13 - Question

The disk brake torque is linearly proportional to the actuating force.

a) Yes
b) No, it is proportional to its square
c) Proportional to its cube
d) Independent of force