DieselShip's Online Content Library

Q1. Sketch and show all parts of a two-stroke engine stuffing box. Describe the procedure of overhauling two stroke engine stuffing box, without removing piston. Answer should include all safety precautions and necessary tools used for stuffing box overhaul.

Q2. Explain with a sketch “speed droop” in a governor; Answer the following

A. How is a main engine governor different from an auxiliary engine governor?

B. Explain how load is transferred to an incoming generator explaining your actions with relation to the governor’s “droop line”.

Q3. A. Describe with the aid of sketches a fuel pump capable of variable injection timing;

B. State why injection timing might need to be changed;

C. State how injection timing is adjusted while the engine is running.

Q4. Fatigue is one of the main causes of crankshaft failure.

A. Indicate on a Sketch the most likely location of a fatigue crack;

B. How is a fatigue failure is identified;         C. Describe initiation of a fatigue crack;

D. Sketch and Describe the methods used to inhibit fatigue cracks

Q6. With reference to bridge control of a large slow speed propulsion engine.

A. How is starting and reversing achieved?

B. Investigate and suggest remedial action required if the engine,

(i) Fails to turn on air.

(ii) Turns on air but fails to fire on fuel;

(iii) Fails to reverse.

Q6. A. A number of main engine cylinder covers have been subjected to cracking during the preceding four months –

i. Explain possible reasons for this cracking;

ii. State with reasons the action you, as Second Engineer, would take in order to reduce the possibility of future cylinder cover cracking.

B. Cylinder liner wear has increased appreciably during the past six months. Write a brief report to the engineering superintendent concerning this matter explaining the possible causes the immediate action taken to deal with the problem and the action you, as Second Engineer, intend to take in order to reduce the risk of future incidents.

Q7. Sketch and Discuss the precautions and protections that are provided to minimize the possibility of a diesel engine crank case explosion and the transmission of dangerous flame into the machinery space;

A. By design and equipment; B. By operating personnel

Q5. Sketch and describe the arrangement of a main engine camshaft chain. Describe the repair procedure following fracture of one chain link during operation of the engine. Give possible reasons for the failure and explain how the chain is set initially at the correct degree of tension.

Q9. Describe the phenomena of vibration in marine diesel engine. Explain the terms:

(a) Transverse Vibration (b) Torsional Vibration (c) Resonance (d) The role of vibration dampers.