Multiple Choice Questions (MCQ) on Air standard cycles
Multiple Choice Questions (MCQ) on Air standard cycles
Air standard cycle uses ___ as a working medium.
- Perfect gas
- Real gas
- Ideal gas
- Natural gas
(Ans:a)
Which of the following is not an assumption while analyzing Air standard cycles?
- The working medium follows the law pV=mRT
- Working medium has constant specific heats
- Working medium does not undergo any chemical change throughout the cycle
- Heat is supplied and rejected in irreversible manner
(Ans:d)
For perfect gas
- cp – cv = R
- cp + cv = R
- cp / cv = R
- cp X cv = R
Where cp & cv are specific heats at constant pressure and volume.
(Ans:a)
For a perfect gas, enthalpy ‘h’ is given by
- u + RT
- u – RT
- u + pv
- u – pv
Where u = internal energy, R = Gas constant, T = Absolute temperature, p = pressure, v = specific volume
(Ans:a)
For non flow process, the first law of thermodynamics is
- Q – W = ΔU
- Q + W = ΔU
- Q – W = ΔH
- Q + W = ΔH
Where, W = Work done, Q = Heat interchange, ΔU = Change in internal energy, ΔH = Change in enthalpy
(Ans:a)
In Air standard cycle, the W/Q (W = Work transfer from the cycle, Q = Heat transfer to the cycle) ratio is known as
- Specific consumption
- Specific work transfer
- Air standard efficiency
- Work ratio
(Ans:c)
The Carnot cycle consists of
- Two isothermal and two adiabatic processes
- Two isothermal and two constant volume processes
- Two isothermal and two constant pressure processes
- Two isothermal and two isenthalpic processes
(Ans:a)
The Stirling cycle consists of
- Two isothermal and two adiabatic processes
- Two isothermal and two constant volume processes
- Two isothermal and two constant pressure processes
- Two isothermal and two isenthalpic processes
(Ans:b)
Which of the following cycles has maximum possible efficiency between any two temperatures?
- Stirling cycle
- Ericsson cycle
- Carnot cycle
- Lenoir cycle
(Ans:c)
Which of the following cycles, a heat exchanger is used?
- Stirling cycle
- Diesel cycle
- Carnot cycle
- Otto cycle
(Ans:a)