## Engineering Thermodynamics The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

dQ = ds/T
δQ = T.ds
None of the listed here
δQ = T/ds

## Engineering Thermodynamics Which of the following is the correct statement?

All engines are designed as reversible in order to obtain maximum efficiency.
All the reversible engines have the same efficiency.
Irreversible engines have maximum efficiency.
All the reversible and irreversible engines have the same efficiency.

## Engineering Thermodynamics The work ratio of a gas turbine plant is given by

(Isentropic increase in temperature)/(Actual increase in temperature)
(Net work output)/(Work-done by the turbine)
(Net work output)/(Heat supplied)
(Actual temperature drop)/(Isentropic temperature drop)

Gay-Lussac law
Boyle's law
Charles' law

## Engineering Thermodynamics A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as

Irreversible cycle
Thermodynamic cycle
None of these
Reversible cycle

## Engineering Thermodynamics The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called

Specific heat at constant volume
Specific heat at constant pressure
None of these
Kilo Joule