SSC JE Mechanical Engineering 24th Jan 2018 Shift-1
For the following questions answer them individually
A reversible engine, which operates between temperature range of 1200 K and 600 K, rejects 30%of heat to the sink comes under the classification of?
A gas is compressed frictionless from an initial state of y m$$^3$$ and 1 MPa to a final state of 0.2 m$$^3$$ and 1 MPa. There is a transfer of 40 kJ of heat from the gas and a drop of 20 kJ in internal energy. What is the initial state volume of the gas?
What is the drop in enthalpy (in kJ/kg) for a steam whistle which is perfectly insulated and does not work has an exit velocity of steam at 40 m/sec?
Two Carnot engines are connected in a series with working extreme temperatures as 2000 K and 200 K respectively. Whatis the efficiency of the first Carnot engine (in %)?
