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Steam Boilers - Interview Questions and Answers

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1. The equivalent evaporation of a boiler is a measure to compare
A. the given boiler with the model
B. the two different boilers of the same make
C. two different makes of boilers operating under the same operating conditions
D. two boilers of same make but operaing under different conditions
E. any type of boilers operating under any conditions.
Explanation:
2. On Millier chart, the constant pressure lines
A. diverge from left to right
B. diverge from right to left
C. are equally spaced throughout
D. first rise up and then fall
E. none of the above.
Explanation:
3. In forced recirculation type boiler,
A. heating takes place at bottom and the water supplied at bottom gets con-verted into the mixture of steam bubbles and hot water which rise to drum
B. water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
C. feed pump is employed to supplement natural circulation in water wall type furnace
D. water is converted into steam in one pass without any recirculation
E. heating of water takes place in stages.
Explanation:
4. With increase in load, radiant superheater has
A. drooping characteristic
B. lihear characterisstic
C. rising characteristic
D. flat characteristic
E. none of the above.
Explanation:
5. The overall efficiency of thermal power plant is
A. boiler efficiency, turhine efficiecny, generator efficiency
B. all the three above plus gas cycle ef-ficiency
C. carnot cycle efficiency
D. regenerative cycle efficiency
E. rankine cycle efficiency.
Explanation:
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