A large number of the candidates could not identify the unit because they have not been able to do practical works on motor vehicle. Some candidates identified it as either brake assembly, shoe brake or road wheel.

(a)The unit is a disc brake.

(b)Part X is a pad while Y is a disc

(c)Merits:
(i)It is self compensating.
(ii)It is easier to service.
(iii)There is cleaner braking surface.
(iv)It offers greater heat dissipation.