The first law efficiency is defined as the ratio of the output energy to the input energy.

Related MCQs

• Both first law efficiency and second law efficiency indicate how effectively the input has been converted into the product.
• Consider the following statements: The definition of 1. temperature is due to zeroth law of thermodynamics 2. entropy is due to first law of thermodynamics 3. internal energy is due to second law of thermodynamics 4. reversibility is due to Kelvin-Planck's ststement of these statements
• For a power plant, second law efficiency can be given by desired output(W) / available energy(Wmax).
• If a heat enine gives an output of 3 kW when the input is 10,000 J/s, then the thermal efficiency of the engine will be
• ……… is the ratio of actual cycle efficiency to that of the ideal cycle efficiency
• Second law efficiency is defined as
• For proper utilization of exergy, it is desirable to make first law efficiency           and the source and use temperatures should
• a heat engine receives heat at the rate of 1500 kJ/min.& gives an output of 8.2 kW. Its thermal efficiency is equal to
• Second law efficiency can also be given as
• In case of a heat pump, second law efficiency is given as