Increasing the ratio between the lowest and the highest temperatures in reversible heat engine will always increases the work output for a given thermal inputQuestion 6Select one:a.TRUEb.FALSE

A heat engine receives heat from a source at 800 degrees C and rejects the waste heat to a sink at 40 degrees C. If heat is rejected from this engine at a rate of 80 kJ/s, the maximum power this heat engine can produce isQuestion 1Select one:a.194 kWb.1520 kWc.80 kWd.241 kWe.128 kW

About the condition that the air-fuel ratio feedback correction stops, after engine warm-up (Coolant temperature: more than 50°C (122°C)).Group of answer choicesTrueFalse

In a regenerative Brayton cycle the maximum heat input that can be saved corresponds to the difference in enthalpy between the exhaust of the turbine and the inlet of the compressorQuestion 6Select one:a.TRUEb.FALSE

A heat engine with an efficiency of 25% takes 1400 J of heat from the high temperature heat source and does J of work in each cycle.

The ideal vapour-compression refrigeration cycle is not a reversible cycle becauseQuestion 1Select one or more:a.heat input is not isothermal across an infinitesimal temperature differenceb.the ideal compression process is non-isentropicc.heat rejection is not isothermal across an infinitesimal temperature differenced.expansion process through the throttling valve is irreversiblee.phase changes that occurring during heat input and output cannot be reversed