Thermodynamics

121. The unit of time in S.I. units is

1. second
2. minute
3. hour
4. day
5. year.

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122. The unit'of universal gas constant is

1. watts/°K
2. dynes/°C
3. ergscm/°K
4. erg/°K
5. none of the above.

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123. The value of n = 1 in the polytropic process indicates it to be

1. reversible process
2. isothermal process
3. adiabatic process
4. irreversible process
5. free expansion process.

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124. The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is

1. 29.27 kgfm/mol°K
2. 8314kgfm/mol°K
3. 848kgfm/mol°K
4. 427kgfm/mol°K
5. 735 kgfm/mol°K.

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125. The value of the product of molecular weight and the gas characteristic constant for all the gases in S.I. units is

1. 29.27 J/kmol°K
2. 83.14J/kmol°K
3. 848J/kmol°K
4. All J/kmol °K
5. 735 J/kmol °K.

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126. Thermal power plant works on

1. Carnot cycle
2. Joule cycle
3. Rankine cycle
4. Otto cycle
5. Brayton cycle.

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127. To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is

1. divided by its molecular weight
2. multiplied by its molecular weight
3. multiplied by its density
4. multiplied by its specific weight
5. divided by its specific weight.

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128. Total heat of a substance is also known as

1. internal energy
2. entropy
3. thermal capacity
4. enthalpy
5. thermal conductance.

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129. Universal gas constant is defined as equal to product of the molecular weight of the gas and

1. specific heat at constant pressure
2. specific heat at constant volume
3. ratio of two specific heats
4. gas constant
5. unity.

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130. Water contained in a beaker can be made to boil by passing steam through it

1. at atmospheric pressure
2. at a pressure below the firuosphejric pressure
3. at a pressure greater than atmospheric pressure
4. any pressure
5. not possible.

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