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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)

Q6. With reference to a bank of emergency lead acid batteries:

A.  State the conditions of the battery bank if the specific gravity of a number of cells in the bank is in the region of 1.11 with an ambient temperature of 160Celcius;

B. Describe a systematic procedure for checking the conditions of the battery bank if it is divided into section for charging;

C. Describe the necessary routine maintenance;

D. Describe how capacity test carried out on bank of Batteries.

Q5. In engine rooms that are operated under UMS conditions describe with the aid of sketches how the following are monitored:

A. The perforation of a high-pressure fuel pipe;

B. The imminence or possibility of a scavenge fire;

C. Condition that may be conducive to a crankcase explosion

Q6. A. Describe the events leading to a crankcase explosion.

B. State how overheating might be indicated other than by a mist detector.

C. Discuss the procedure to follow in the invent of overheating being indicated.

D. State how severity of a crankcase explosion is limited.

Q4. With reference to steering gear hydraulic systems:

A. Explain the factors that could contribute to failure of connecting flange leading to total loss of oil from the system.

B. Describe an arrangement designed to ensure that the problem would not cause steering failure.

Q1: Describe how the following conditions are prevented in auxiliary boilers:

A. Feed contamination by oil from heating coil drains.

B. Internal corrosion.

C. Furnace blowback.

D. Uptake fire.

Q1. With reference to the provision of a shore electrical supply to a ship:

A. Sketch an arrangement for taking A.C. shore supply and checks to be carried out prior taking shore connection?

B. Describe the method of safely connecting the arrangement sketched in (A) to the shore Supply?

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.