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Q1. (a) Describe, with the aid of sketches, how the test pieces for a Class 1 pressure vessel are obtained. (6)

(b) List the tests which are carried out on the test pieces described in part (a). (4)

Q2. With reference to automatic control systems:

(a) explain the term proportional band width; (2)

(b) state how the proportional band may be adjusted on EACH of the following:

(i) motion balance controllers (2)

(ii) force balance controllers. (2)

(c) explain the consequences if the proportional band is set incorrectly. (4)

Q3. With reference to a keyless propeller designed for hydraulic (wet) fit and withdrawal:

(a) describe, with the aid of a sketch, how the propeller is fitted to the tail shaft; (6)

(b) state TWO advantages compared to a dry fit; (2)

(c) explain how the thrust is transmitted without the use of a key and keyway. (2)

Q4. With reference to centrifugal pumps:

(a) Explain how the performance may be assessed without the need to dismantle the pump; (3)

(b) state the effects of misalignment between the driving motor and the pump; (3)

(c) describe, with the aid of a sketch, how on a new replacement motor, alignment is checked and adjusted. (4)

Q5 . With reference to the design, construction and materials used in the manufacture of plate type heat exchangers, explain why, in most cases, they are superior to tubular type heat exchangers. (10)

Q6 . The steering gear operation of a vessel that recently experienced a heavy storm is found to be abnormally sluggish.

(a) State FIVE reasons for possible malfunction of the gear. (5)

(b) State the corrective actions that may be carried out at sea, that will allow the vessel to continue to the nearest port. (5)

Q8. Explain the legal, administrative and technical responsibilities of a Chief Engineer Officer.(10)

Q8. With reference to CO2 gas provided for firefighting purposes:

(a) describe, with the aid of a sketch, a system for the detection and extinguishment of hold fires;(7)

(b) state how the amount of gas to be released into the hold space is estimated. (3)

Q9. With reference to voltage variation profiles caused by load changes imposed on alternating current generators when starting large motors online:

(a) sketch a voltage dip, showing an acceptable recovery time; (2)

(b) state FOUR salient factors that cause the variation in part (a); (4)

(c) outline FOUR salient factors that assist recovery from the deviation shown in part (a). (4)

Q10. With reference to three-phase induction motor starters:

(a) explain why star-delta starters are employed; (2)

(b) explain what is meant by reduced voltage starting in the context of star-delta starters; (2)

(c) explain, with the aid of a power circuit, the sequence of operation of a start-delta starter. (6)

Q11. With reference to the protection of electrical power circuits:

(a) explain discrimination, describing how it is achieved. (5)

(b) state, with reasons, the type of fuses used for protection; (3)

(c) explain preferential tripping. (2)

Q12. With reference to large fixed bladed propellers:

(a) describe, with the aid of a sketch, EACH of the following:

(i) the effect of hull fouling; (3)

(ii) operation in clean hull, ballast condition. (3)

(b) explain why fitting a light propeller may be beneficial. (4)

Q13. With reference to large bulk carriers:

(a) sketch a cross section of a bulk carrier through the mid-ship; (5)

(b) explain the design features that have evolved to minimise the possibility of failure. (5)

Q14.With reference to drydocking a vessel:

(a) state the pre-docking information that should be given to the drydock authority; (5)

(b) list the items to be inspected once the dock is empty. (5)