DieselShip's Online Content Library

Q3. (a) Briefly explain the construction and functions of a bedplate in a slow speed marine diesel engine? (8)

(b) How is the bedplate fastened to the hull structure? (4)

(c) What is the function of the tie-rod in a slow speed 2-stroke engine? (4)

Q5. (a) Why exhaust outlet of marine diesel engine turbocharger is lower than inlet temperature? (6)

(b) Why do we need an air cooler and why is the scavenge air temperature maintained at 40°C? (10)

Q8. (a) (i) Describe with the aid of a sketch, a main engine exhaust valve which is hydraulically operated (8)

(ii) Explain the operation of this valve (4)

(b) State the materials used for the seat and valve described in (a) (4)

Q7. (a) Why do you need an 'over-speed' trip despite a governor being fitted to a marine diesel engine? (8)

(b) With respect to an auxiliary engine governor, what is the significance of: (8)

(i) The Load limit knob

(ii) The compensation

Q8. (a) Explain briefly how the different moving parts of a main engine are subjected to various stresses. (8)

(b) Name the stresses and justify by stating how they originate. (8)

Q1. (a) Describe the procedure for taking crankshaft deflection of Auxiliary Engine, explaining all precautions that must be observed (8)

(b) Explain what deflection readings actually mean and suggest the action which must be taken should readings be outside values recommended by the engine manufacturer. (8)