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Q2. a) Sketch and describe a high pressure cut-out in a refrigeration system. (6)

b) The refrigeration compressor has stopped due to operation of the H.P. cut-out.

Explain: (i) The possible causes. (3)

b) How these causes would be found and possible remedies. (3)

c) What steps are taken if the compressor “Short-cycle” on low pressure cut-out? (4)