Q5. With reference to boiler feed water systems:
a) Describe the relationship between density and relative density. (4)
b) Describe what is meant by total dissolved solids (TDS). (4)
c) Explain why a high TDS is detrimental to a steam plant system, and how it is controlled. (4)
d) State TWO faults that may cause the total dissolved solids to reduce. (4)
Q5. (a) State the consequences of not testing or treating the water in a boiler. (4)
(b) For a fire tube auxiliary boiler
(i) Explain how scale may form on the heating surfaces. (4)
(ii) State FOUR tests which are usually carried out on the boiler water (8)
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