(a) State why air compressor suction and delivery valves should seat promptly. (4)

(b) Explain the effect on the compressor if the air is induced into the cylinder at a temperature higher than normal. (4)

(c) What would be the effect of the suction valves having too much lift? (4)

(d) Explain why pressure relief devices are fitted to the waterside of cooler casings and their normal set values. (4)