SECTION B
In this section of the paper, the candidates’ answers were just satisfactory. However, question 15 was not attempted by many candidates; questions 12 and 13 were not adequately answered. Their solutions are accordingly given below.
Question 12
Fig. 4: A unit of automobile Transmission System
Use the sketch in fig. 4 to answer the questions in 12 (a)
- (i) What is the name of the unit?
(ii) State two functions of the unit in the system.
(iii) Name the part labelled N.
(iv) Name the component of the transmission system which is
mounted to the part labelled N.
(b) State three causes of oil leakage in rear axle.
Observation
Solution
(a)
(i) The Name of the Unit
Life Rear axle/Final drive unit
(ii) Functions of the Unit in Automobile Transmission System
It accommodates half-shaft.
It transmits drive to the road wheels.
It provides differential to the road wheels.
It provides casing for lubricating oil.
It accommodates the final drive gears.
It accommodates the braking system.
It accommodates the suspension system.
It carries the rear weight of the vehicle.
It accommodates the road wheels.
(iii) N: Driver coupling (Companion flange)
(iv) The Part to Which N is Mounted
Propeller shaft
(b) Causes of Oil Leakage in Rear Axle
Worn drain plug
Worn or broken seal
Cracked housing
Damaged gasket
Loose bolts