DieselShip's Online Content Library

Q4. During your watch you observe that Main Engine LO. Sump level is rising due to contamination of lubricating oil. Describe the procedure:

a) To identify the contaminant. (6)

b) Locate the cause of contamination. (6)

c) Action to make the oil suitable for its continued usage. (4)

Q2. With reference to main refrigeration plant give reason for each of the following operational irregularities and state how these are dealt with:

a) Rapid loss of lubricating oil from the crankcase of a "vee" block compressor. (4)

b) steady "fall off" in refrigeration effect over a comparatively short period of time. (4)

c) Excessive "icing up" at compressor suction. (4)

d) Short cycling. (4)

Q3. Performance of a Fire-pump has deteriorated and is not developing required head. Describe the following:

a) The procedure for dismantling the pump. (4)

b) The likely defects and remedial measures to be taken. (3)

c) Which all Clearances are to be checked. (3)

d) Precautions during assembly. (3)

e) Checks for alignment of motor pump coupling. (3)

Q9. Give reasons why each of the following conditions can result in oil being carried over with the water discharge from lubricating oil centrifuges:

a) High throughput of mixture. (6)

b) Abnormally high temperature of mixture. (6)

c) Appreciable accumulation of solids in bowl. (4)

Q6. (a) Describe different components used in soldering process. (6)
(b) Describe soldering process in detail. (6)
(c) What are Do's and Don'ts for good soldering joint. (4)

Q7. Write short notes on the following:

(a) The need for taking double bottom tank soundings regularly after a grounding incident. (4)

(b) Need to pre-heat main engines prior to continuous running of the engine. (4)

(c) Utility of pressure gauges on either side of high pressure fuel oil filters. (4)

(d) The purpose of opening indicator cocks before blowing through an engine. (4)

Q8. (a) Describe maintenance required on auxiliary boiler burner. (8)
(b) Describe safety features provided on fuel burning system of auxiliary boiler (8)

Q9. (a) Describe what would be the indications of crank case explosion in main engine. (4)

(b) Describe actions to be taken, if there is crank case explosion in main engine. (8)

(c) Describe means of prevention of crank case explosion. (4)

Q8. Describe actions to be taken with reasons for the following malfunction on auxiliary boiler.

(a) Pilot burner does not fire (4)

(b) Efficiency of boiler is low (4)

(c) Low water level in boiler (4)

(d) Flame failure. (4)