Q5. (a) Draw a simple line sketch of a 'shell and tube' cooler, clearly labelling its parts. (6)
(b) Describe the system. (4)
(c) Name common defects found. (3)
(d) What periodical maintenance needs to be carried out. (3)
Q6) (a) Describe the constructional features of plate type freshwater generator and its operational procedures for freshwater generation. (6)
(b) State the temperatures and pressures at salient points. (4)
(c) State some of the advantages and limitations that exist in using a plate type heat exchanger. (6)
Q8. (a) Describe the functional components of a reefer plant for the domestic refrigeration system and temperatures to be maintained in different cold rooms. (8)
(b) In reference to a domestic refrigeration system briefly describe the following: (8)
(i) Pressure switches
(ii) Tubular heat exchangers
(iii) Oil Separator
(iv) Drier system
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