Thermodynamics Questions

• By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
• In a free expansion process,
• In closed cycle gas turbine, the air is compressed
• The efficiency of a gas turbine is given by
• Boyle's law states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
• A process, in which the gas is heated or expanded in such a way that product of its pressure and volume remains constant, is called isothermal process.
• The temperature at which the volume of a gas becomes zero is called
• One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to
• The work ratio of a gas turbine plant is given by
• Coke oven gas is obtained by burning coke in an oven.
• One m3 of methane (CH4) requires 2m3 of oxygen and produces 1m3 of carbon dioxide and 2m3 of water or steam.
• The variables which control the physical properties of a perfect gas are
• The reading of the pressure gauge fitted on a vessel is 25 bar. The atmospheric pressure is 1.03 bar and the value of 'g' is 9.81 m/s2. The absolute pressure in the vessel is
• Select the wrong statement
• One kg of hydrogen requires 8 kg of oxygen and produces
• The absolute zero pressure will be
• In an extensive property of a thermodynamic system
• An open system is one in which
• Workdone during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)
• When the gas is cooled at constant pressure,