Q2. Sketch a high-lift safety-valve lid and seat detailing their special features. Describe how such a valve is overhauled and any clearance that should be measured and noted. (16)
Q7. With reference to auxiliary boiler safety valve:
A. Describe, with aid of a Sketch the safety valves for an auxiliary boiler;
B. Identify, with reasons, the part that require particularly close attention during overhaul;
C. Describe how the safety valves are reset after an overhaul.
Q8. A. Explain the action of EACH of the following metallurgical mechanism:
(i) Creep; (ii) Brinelling; (iii) Fretting; (iv) Fretting corrosion;
B .State, with reasons, where EACH of the mechanisms in occur in ship propulsion System.
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