DieselShip's Online Content Library

Q1. Describe the 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)

Q2. 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)

Q3. 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)

Q4. With reference to auxiliary boilers

(a) Briefly describe the maintenance procedures for oil burning equipment. (5)

(b) Explain the need for and the use of soot blowers. (5)

(c) Describe how a boiler should be taken out of service. (6)

Q5. An air cooler of a large two stroke marine diesel engine is showing poor performance. Suggest some measures you would initiate to rectify the problem and improve the performance. (16)

Q6. Briefly explain the following:

(a) How would you know if a refrigeration system is 'undercharged'? (4)

(b) What should you do to ensure that there is no water leakage into the engine cylinder before preparing main engine for sea? (4)

(c) What would be the probable cause of a rise in the level of the lub oil sump tank of a main engine? (4)

(d) How does the valve rotator as fitted on an exhaust valve of aux. engine work? (4)

Q7. With reference to Steering Gear & Hydraulic Power Rotary pumps:

(a) Explain how the reserve of fluid in the system is checked and how make-up is achieved? (5)

(b) Describe how a steering system is tested prior to leaving port with reference to SOLAS (5)

(c) Explain how tests are made for leaks, and air and other gases are bled from the system. (6)

Q8. (a) What are some key components of a heat exchanger that you would examine closely during a maintenance check? (8)

(b) How is leakage detected in plate-type and shell-and-tube heat exchangers? (8)

Q9. 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)