Q6. “With reference to a four-ram hydraulic gear”, having duplicate pumps-
a) Sketch the arrangements of relief, make up, isolating and by-pass valves. (8)
b) Explain the use of isolating and by-pass valves, if one of the cylinders has fractured. (4)
c) Describe the arrangement provided to indicate the loss of hydraulic fluid due to leakage. (4)
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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