Q1. State, with reasons, EIGHT areas or items which should be checked by the duty engineer before taking over the watch. (16)
Q2. (a) Explain the meaning of the term Supercharging and state how it is achieved. (8)
(b) State how would you ascertain that EACH of the following components had become fouled:
(i) Charge air intercooler (4)
(ii) Air intake suction filters. (4)
Q3. With reference to the diesel engine cooling system:
(a) Explain why cooling is necessary (4)
(b) State the purpose of EACH of the following:
(i) Jacket water heater (4)
(ii) Jacket water drain tank (4)
(iii) Header tank (4)
Q4. With respect to two-stage reciprocating compressors used for air start purposes:
(a) State FOUR reasons for taking too long to fill the main starting air bottles. (8)
(b) State FOUR safety devices that may be fitted. (8)
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)
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