Q5. Sketch and explain the construction of a feed Check Valve. Why is it known as double shut off arrangement. (16)
Q1. Discuss, with reference to the superheater outlet temperature of the main boiler operating at a constant load, the following statements:
a) An increase in excess air will tend to cause a decrease in superheater outlet temperature due to the cooling effect of more air being introduced.
b) A decrease in economizer inlet temperature will tend to cause a decrease in super heater outlet temperature due to the cooling effect of more water being introduced.
c) Badly fouled generating tube banks will cause an increase in the super heater outlet temperature.
d) Excessive amounts of total dissolved solids in the boiler water will cause variations in the super heater outlet temperature
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