Q2. a) Explain why it is necessary to have reverse power protection for alternators intended for operation. (6)
b) (i) Sketch a reverse power trip. (5)
(ii) Briefly explain the principle on which the operation of this power trip is based and how tripping is activated. (5)
Q8. a) State the hazards which may be encountered when entering an enclosed space and the precautions that should be taken. (5)
b) Sketch and describe an oxygen analyser which can be used to sample the atmosphere in void or closed spaces. (5)
c) Instruction given to person entering the enclosed space as per the ISM procedures. (6)
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