DieselShip's Online Content Library

Q1. With reference to the treatment of water for auxiliary boilers:

(a) State the major risks from

i) Hard water. (3)

ii) soft water. (3)

(b) Describe FIVE types of boiler water tests that are carried out on board stating the reason for EACH. (5)

(c) State why regular blow down and make up of the contents of a boiler is essential. (5)

Q2. Describe an air receiver and explain clearly the purpose of the mountings. State the defects, which may develop and explain the precautions which should be taken to minimize the possibility of deterioration or damages to the receiver. (16)

Q3. State with reasons which one of the following would most help to correct a pronounced discoloration of the M/E lubricating oil (16)

a) "Make up" from reserve tanks.

b) Increase purifier throughput.

c) Increase frequency of filter pack cleaning.

d) Overhaul piston rod stuffing boxes.

e) check tank top Integrity of sump tank.

Q4. Describe what examination you will carry out on the following parts of Air Compressor,

a) Suction and delivery valves and seats. (4)

b) Relief valves and bursting discs. (4)

c) coolers and cooling passages. (4)

d) Piston and piston rings. (4)

Q3. Explain in detail how you would isolate one section of a water sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service. (16)

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)

Q6. A Centrifugal pump has been opened up due to abnormal noise:

a) List the checks you will carry out on various parts (4)

b) Name the parts which may require replacement. (4)

c) Checks to be carried out after assembly. (4)

d) Operational parameters, which may be required to be compared with manufacturers test records. (4)

Q5. (a) State, with reasons, the causes of fatigue cracking of engineering components. (4)

(b) State, with reasons, how material and design defects can influence fatigue life. (6)

(c) With reference to engine bed plate transverse girders explain how the incidence of fatigue cracking can be minimized. (6)

Q7.a) Describe how A. E, crankshaft deflections are measured. (6)

b) State how the measurements can be checked for accuracy. (5)

c) Specify with reasons other checks that should be made on the crankshaft. (5)