Exam Question

For a fully automatic provisions refrigeration system incorporating a number of rooms:

(a) Explain how each room temperature is set. (4)

(b) Describe the sequence of events following a demand for increased refrigerant flow from one room. (4)

(c) State with reasons the devices incorporated into the system to protect the machinery and equipment against malfunction. (4)

(d) State how satisfactory operation of the plant can be established? (4)