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Steam Boilers - Interview Questions and Answers

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131. In a throttling process
A. heat transfer takes place
B. work is done by the expanding steam
C. internal energy of steam changes
D. all of the above
E. none of the above.
Explanation:
132. The increase in pressure
A. lowers the boiling point of a liquid
B. raises the boiling point of a liquid
C. .does not affect the boiling point of a liquid
D. reduces its volume
E. none of the above.
Explanation:
133. In a throttling process
A. steam temperature remaisn constant
B. steam pressure remains constant
C. steam enthalpy remains constant
D. steam entropy remains constant
E. steam volume remains constant.
Explanation:
134. Efficiency of a thermal cycle increases by
A. regeneration
B. reheating of steam
C. both (a) and (b)
D. cooling of steam
E. none of the above.
Explanation:
135. Efficiency of rankine cycle can be increased by
A. decreasing initial steam pressure and temperature
B. increasing exhaust pressure
C. decreasing exhaust pressure
D. increasing the expansion ratio
E. increasing number of regenerative heaters.
Explanation:
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