SSC JE Mechanical Engineering 22nd Jan 2018 Shift-1
For the following questions answer them individually
If the COP of Carnot refrigerator is 4, then the thermal efficiency of the Carnot engine would be ________.
While working between temperatures 150 K and 300 K, the entropy change experienced by the Carnot engine during heat addition is 1 kJ/K, the work produced (kJ) by the engine is ________.
A heat engine working between the source at $$200^\circ C$$ and rejects heat at $$25^\circ C$$ receives 5 kW of heat. Work done for this engine is equal to 0 kW. Does this satisfy the inequality of Clausius?
An ideal gas with heat capacity ratio of 2 is used in an ideal Otto-cycle which operates between minimum and maximum temperatures of 200 K and 1800 K. What is the compression ratio of the cycle for maximum work output?
In an Otto cycle, air is compressed from 3 litres to 2.4 litres from a starting pressure of 1.5 kg/cm2. The net output per cycle is 400 kJ. What is the mean effective pressure (kPa) of the cycle?
