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)
Q5. List FOUR safety or alarm devices fitted to an automatically controlled auxiliary boiler indicating how EACH of these devices may be tested. (16)
Q5. (a) State the name given to the water level indicators mounted on a boiler. (2)
(b) State why at least two of the items stated in (a) are fitted. (4)
(c) List FIVE boiler mountings which are subject to survey, other than those stated in (a). (10)
Q5. With reference to auxiliary boilers:
(a) Explain how scale forms on the heating surfaces (8)
(b) State TWO reasons why scale is undesirable (4)
(c) State how scale build up is prevented from forming in steam boilers (4)
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
