Q4. With reference to main starting air compressors:
(a) State THREE maintenance procedures that maintain their efficiency: (6)
(b) Describe the procedure for the manual starting of a compressor. (10)
Q5. (a) State the name given to the water level indicators mounted on a boiler. (2)
(b) State why at least two of the items stated in (a) are fitted. (4)
(c) List FIVE boiler mountings which are subject to survey, other than those stated in (a). (10)
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