Asteam power plant operates between a boiler pressure of 50 bar and a condenser pressure of 2 bar. calculate for these limits, the cycle efficiency, the work ratio, and the specific steam consumption: 1. for a carnot cycle using wet steam; 2. for a rankine cycle with dry saturated steam at entry to the turbine.

An inventor claims to have developed a reversed heat engine (ie. a heat pump) which is able to deliver 10 kj heat into the room at 20°c from outside ambient temperature of -10°c by consuming only 2 kj electricity in winter. this claim is a)-impossible b)-possible only if the heat pump is ideal c)-practically possible d)-unable to be assessed as it depends on the working fluid used in the heat pump.