DieselShip's Online Content Library

Q1. (a) Discuss the merits of a condition monitoring system compared to other maintenance regimes. (5)

(b) Describe how the data is gathered, stored and evaluated on a computer-based vibration analysis system. (5)

Q2. Discuss the advantages and disadvantages of electrical remote monitoring and control systems compared to pneumatic systems. (10)

Q3. (a) Sketch an engine room fresh water central cooling system, indicating the water temperatures at salient points on the system. (6)

(b) State, with reasons, FOUR advantages of the system sketched in part (a) compared to one which is totally sea water cooled. (4)

Q4. With reference to centrifugal pumps and pumping systems:

(a) explain, with the aid of a diagram, the distinction between Net Positive Suction Head available (NPSHa) and Net Positive Suction Head required (NPSHr); (8)

(b) explain how the NPSHa may be increased by design. (2)

Q5. Describe, with the aid of a block diagram, a compensated control system for an active fin stabilisation unit

Q6. With reference to a domestic refrigeration plant, state TWO causes of EACH of the following

conditions, stating how EACH cause may be rectified:

(a) excessive pressure; (2)    (b) low pressure at evaporator suction; (2)

(c) compressor cycling; (2)   (d) compressor running for long periods but not lowering the temperature in the cold rooms(2)              (e) compressor operating noisily. (2)

Q7. (a) Explain the principles of osmosis and reverse osmosis. (4)

(b) Describe how reverse osmosis is used for the production of fresh water on board ship(4)

(c) State the limitation of the quality of the permeate in a single pass reverse osmosis system, describing how the quality of the permeate could be improved. (2)

Q8. The company, with which you are employed, requests that all Chief Engineer Officers prepare standing orders regarding the prevention and detection of fires in the machinery spaces. Compile such a list of recommendations to be submitted to central office. (10)