71. The compression ratio for petrol engines is
72. Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant
73. Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant
74. A definite area or a space where some thermodynamic process takes place is known as
75. The work ratio of a gas turbine plant is given by
76. The mass of excess air supplied is equal to
77. An ideal gas as compared to a real gas at very high pressure occupies
78. The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
79. If the value of n = 0 in the equation pvn = C, then the process is called
80. If in the equation pvn = C, the value of n = $$ \propto $$, then the process is called
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