Chemical Engineering Thermodynamics

111. Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture _________ calorimeter is not used for measuring the dryness fraction of steam.

1. Bomb
2. Separating
3. Bucket
4. Throttling

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113. During adiabatic expansion of gas

1. Pressure remains constant
2. Pressure is increased
3. Temperature remains constant
4. None of these

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114. During Joule-Thomson expansion of gases

1. Enthalpy remains constant
2. Entropy remains constant
3. Temperature remains constant
4. None of these

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115. During the phase transition, _________ changes.

1. Pressure
2. Volume
3. Temperature
4. All (A), (B) and (C)

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116. dW and dq are not the exact differential, because q and W are

1. State functions
2. Path functions
3. Intensive properties
4. Extensive properties

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117. Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is

1. (T₂ - T₁)/T₂
2. (T₂ - T₁)/T₂
3. (T₁ - T₂)/T₂
4. (T₁ - T₂)/T₁

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118. Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

1. Two temperatures only
2. Pressure of working fluid
3. Mass of the working fluid
4. Mass and pressure both of the working fluid

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119. Enthalpy 'H' is defined as

1. H = E - PV
2. H = F - TS
3. H - E = PV
4. None of these

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120. Enthalpy changes over a constant pressure path are always zero for _________ gas.

1. Any
2. A perfect
3. An easily liquefiable
4. A real

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