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Steam Boilers - Interview Questions and Answers

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121. Heating wet steam at constant temperature is heating it at constant
A. volume
B. pressure
C. entropy
D. enthalpy
E. none of the above.
Explanation:
122. Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to
A. 421 kgm
B. 421 kgm
C. 539 kgm
D. 102 kgm
E. 75 kgm.
Explanation:
123. Adiabatic process is
A. essentially an isentropic process
B. non-heat transfer process
C. reversible process
D. constant temperature process
E. constant enthalpy process.
Explanation:
124. The evaporation of 15.653 kg of water per hour from and at 100�C is called
A. evaporative capacity
B. factor of evaporation
C. equivalent evaporation
D. one boiler h.p.
E. boiler efficiency.
Explanation:
125. Equivalent evaporation is the amount of water evaporated in a boiler from and at
A. 0�C
B. 100�C
C. saturation temperature at given pres�sure
D. room temperature
E. 20�C.
Explanation:
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