SSC JE Mechanical Engineering 22nd Jan 2018 Shift-2
For the following questions answer them individually
If a heat engine produces work without the consumption of energy, then what kind of machine is this?
In a P-T phase diagram of a pure substance, which of the following lines separates solid and liquid region?
A gas is compressedfrictionless from an initial state of 0.4 m$$^3$$ and 0.1 MPa to a final state of 0.2 m$$^3$$ and 0.1 MPa. There is a transfer of 35 kJ of heat from the gas. Whatis the change in internal energy (in kJ)?
What is the velocity of steam (in m/sec) at exit across a steam whistle which is perfectly insulated and does not perform any work and undergoes a drop of 0.2 kJ/kg in enthalpy from entry to exit?
A heat engine performs a work of 100 kJ per cycle. The efficiency of the engine is 50%. Whatwill be the amount of heat rejected (in kJ) per cycle?
