Thermodynamics Questions

• A cycle consisting of two constant pressure and two isentropic processes is known as
• The value of one bar (in S. I. units) is equal to
• A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
• The throttling process is __________ process.
• The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
• When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as
• The change of entropy, when heat is absorbed by the gas, is
• Which of the following is the extensive property of a thermodynamic system?
• Second law of thermodynamics defines
• The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as
• One kg of sulphur requires 1 kg of oxygen for complete combustion and produces 2 kg of sulphur dioxide.
• The ultimate analysis of coal consists of the determination of the percentage of
• The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)
• The fuel mostly used in blast furnace for extracting pig iron from iron ores is
• The heating of a gas at constant pressure is governed by
• One kilowatt is equal to
• A closed cycle gas turbine works on Joule's cycle.
• A machine which violates the first law of thermodynamics is known as perpetual motion machine of the second kind.
• The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called
• The universal gas constant (or molar constant) of a gas is the product of