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Q6. Explain how leakage of the undermentioned valves may become apparent to watchkeepers and state the effects on engine operation. Describe the immediate and subsequent action Which might be necessary in each case.
(a) Exhaust valve
(b) Fuel valve
(c) Air Starting valve

Q2. Describe the action you as watch keeper would take and outline possible reasons for failure in both the following cases:

a) The auxiliary diesel engine fails to turn on starting air. (8)

b) The engine turn on starting air but fails to fire. (8)

Q9. If an auxiliary diesel generator over speeds and runs away while off load, explain:

a) How it can be stopped? (6)

b) What is likely to be the reasons for the failure? (4)

c) Give details of what checks are made after the engine has been stopped, both regard to (6)

i) Mechanical checks and

ii) Electrical checks

Q4. Difficulties have been experienced in getting the engine to turn on air during manoeuvring.

(a) State the possible causes leading to such a problem. (8)

(b) Remedial measures to be taken to prevent reoccurrence of such a problem. (8)

Q8. Explain how the following conditions affect the power developed by a diesel engine:

(a) Broken piston rings. (4)

(b) Worn fuel pump plungers. (4)

(c) Fouled turbochargers (4)

(d) Worn out liner (4)

Q7. a) Draw a diagrammatic sketch of the Fuel Oil system used in an Electronic type of engine. (8)

b) Describe how fuel injection to unit is carried out. (4)

c) How Fuel injection timing is obtained? (2)

d) Why fuel injection timing is precise in this system? (2)

Q4. Describe reasons and solutions for following troubles occurring during starting of main engine.

a) Engine fails to start. (4)

b) Engine does not reverse. (4)

c) Engine starts on starting air but shuts down. (4)

d) Engine runs unevenly. (4)

Q3. During your watch one of the main engine unit was indicating high exhaust temperature reading. Write a note to Chief Engineer explaining: (16)

(a) The probable cause of the abnormal running condition and how it was diagnosed

(b) List possible corrective actions