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Q1. a) Describe safety limits provided on deck cranes.

b) Describe regular maintenance required on deck cranes.

c) Discuss in the Indian context, the inspection, testing and certification regime being followed for the lifting appliances on ships.   (16)

Q2. Describe the following non-destructive testing methods:

a) Radiographic Inspection, principle, method in detail. (8)

b) Ultrasonic Inspection, principle, method in detail. (8)

Q3. With regard to keeping gas side of boilers in good condition discuss EACH of the following:

a) The mechanism of combustion, stating the factors which are important to good combustion. (6)

b) Oil fuel treatments. (5)

c) Soot removal equipment. (5)

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)

Q5. To achieve the optimum performance from a main air compressor, describe the routine maintenance necessary on the following components.

a) unloader. (4)

b) Air intake filter (4)

c) Suction/Discharge valves (4)

d) Intercoolers (4)

Q6. With reference to stuffing box of a two-stroke main engine explain following

a) Why stuffing box is required in two stroke diesel engines. (8)

b) Explain the maintenance carried out on stuffing box during piston overhaul. (8)

Q7.a) Sketch, describe and explain the operation of the domestic refrigeration system of a ship using one of the HFC as refrigerant. What kind of maintenance is essential for the system. (8)

b) Describe the causes for the following in the domestic refrigeration system

i) Frequent cut-in and cut-out of the compressor. (2)

ii) Lub oil low pressure cut-out of the compressor. (2)

iii) High pressure cut-out of the compressor. (2)

iv) Frosting in the compressor suction side. (2)

Q8. The exhaust temperatures of an auxiliary diesel engine are found to be excessive and uneven at normal load, with dark exhaust at the funnel.

Describe EACH of the following:

a) An investigation of the situation. (5)

b) The procedure to remedy the immediate problems. (6)

c) Any further action that might be necessary. (5)

Q9. With reference to centrifuges

a) How is the vertical Height is measured and why vertical Height of the spindle is so critical? (6)

b) Describe the troubles occurring on centrifuges during their operation and their rectification procedure. (10)