Q2. With reference to a refrigeration system:
(a) Describe how air is removed from the system (8)
(b) Describe how and where refrigerant gas is added to the system (8)
Q4. With reference to an aerobic sewage treatment plant:
(a) Explain the need for continuous aeration (6)
(b) Describe the hazards that may be present when the plant requires internal maintenance or inspection. (10)
Q6. Describe how to manually couple a second auxiliary generator to the main switchboard and balance out the load. (16)
Q7. With reference to electrical motors:
(a) State the routine maintenance that is necessary (8)
(b) Describe the tests carried out to prove good electrical condition. (8)
Q9. Explain the meaning and purpose of EACH of the following ship terms:
(a) Hawse pipe. (4)
(b) Chain Stopper. (4)
(c) Fairlead. (4)
(d) Bollard. (4)
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