Question 4
(a) State the function of each of the following units in automobile air-
conditioning system:
(i) compressor;
(ii) condenser;
(iii) expansion valve;
(iv) evaporator.
(b) What is a refrigerant?
(c) List five places where overtaking must not take place on the road.
Observation
The Candidates that attempted this question did satisfactorily well. However, a few of them could not adequately answer question 4(c). Below is the solution of the poorly answered part of the question.
Solution
(c) When Overtake Is Prohibited
- At pedestrian or zebra crossing
- At road junctions
- At road corners
- On narrow bridges
- On level crossing
- On roundabouts
- At the crest of hills
- At points where single solid lanes are not broken
- At bus-stops
- On narrow roads
- Where it is inscribed “No Overtaking!” or “Overtaking Prohibited”