71) The isothermal and isentropic processes are reversible non-flow processes.

72) The blast furnace gas is a by-product in the production of pig iron in the blast furnace.

73) The heat supplied to the gaS at constant volume is (where m = Mass of gas, c_v = Specific heat at constant volume, c_p = Specific heat at constant pressure, T₂ - T₁ = Rise in temp

74) Liquid fuels have lower efficiency than solid fuels.

75) Liquid fuels consist of hydrocarbons.