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Q5. Describe, with the aid of a sketch, the principle of operation of a capacitance electrode level measuring transmitter. (10)

Q1. With reference to plate heat exchangers, explain how EACH of the following design aspects promote heat transfer:

(a) material selection;(5)

(b) flow pattern; (3)

(c) extended surface area. (2)

Q4.With reference to ships' air conditioning systems:(a) state the effects of EACH of the following faults:

(i) corroded return air trunkings; (2)          (ii) blocked evaporator drains; (2)

(iii) defective capacity control. (2)

(b) state the main health hazard that may arise in the air conditioning plant, stating the conditions that need to arise and the measures that should be taken to prevent this occurring. (4)

Q11. With reference to electrical equipment in potentially flammable atmosphere:

(a) Explain why conventional equipment is considered hazardous (2)

(b) Explain the concept of intrinsic safety (3)

(c) Describe, with the aid of a sketch, a safety barrier for an electrical power supply (5)

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)

Q5. With reference to the protection of electrical equipment in a distribution system:

(a) state the aims of the protective devices; (3)

(b) list the parameters that are monitored and acted upon by the protective devices; (4)

(c) state, with reasons, THREE causes of electrical fires. (3)

Q13. (a) State FOUR reasons for transverse watertight bulkheads in ship construction. (4)

(b) State the minimum number of transverse watertight bulkheads and their location. (4)

(c) Describe how watertight bulkheads are tested. (2)

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. As Chief Engineer officer, write a dry dock specification for the repair of the following damage that has occurred, stating what factors have to be considered when costing the repairs. Damage to water ballast tank number 1 port wing. The shell plating 15 mm thick for approx 2 metres square has to be removed and replaced along with the relevant damaged stiffeners. (10)