Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. Line's liquifer is based on the principle of
a. Pulsejet
b. Joule-Thomson effect
c. adiabatic magnetisation
d. adiabatic expansion
e. adiabatic demagnetisation
Q. A process which does not dissipate available energy is known as
a. Adiabatic process
b. Frictionless process
c. Isothermal process
d. Energyless process
e. Ideal process
Q. Gas laws are applicable to
a. Gases and dry, wet and super-heated vapours
b. Gases only
c. Gases and dry and wet vapours
d. Gases and wet vapours
e. Gases and dry vapours
Q. In an optimum four stage compressor system the first and third stage pressure are 1 kg/cm2 and 9 kg/cm2 respectively what will be the fourth stage delivery pressure?
a. 81 kg/cm2
b. 27 kg/cm2
c. 9 kg/cm2
d. 6 kg/cm2
e. 3 kg/cm2
Q. In unsteady state, heat transfer occurs when
a. The body through which heat flow is in motion
b. The source of heat is in motion
c. The heat flow changes with change in temperature
d. The heat flow changes with time
e. None of the above
Q. At critical point the latent enthalpy of vaporisation is
a. Only depends on temperature
b. Zero
c. Maximum
d. Minimum
e. None of the above
Q. Which of the following relation is not valid for throttling process?
a. Enthalpy before expansion = Enthalpy after expansion
b. Pressure before expansion = pressure after expansion
c. External work done = Zero
d. Mass before expansion = mass after expansion
e. None of the above
Q. The specific heat of a perfect gas is a function of
a. temperature, pressure and entropy only
b. temperature only
c. temperature and pressure only
d. Pulsejet
e. temperature and entropy only
Q. Within the boiler, the temperature of steam is highest in
a. Super heater
b. Temperature remains constant
c. Water walls
d. Water drum
e. Water tubes
Q. The rate of diffusion along a column of certain cross-sectional area is proportional to the concentration gradient. Above statement is known as
a. Thompson's law
b. Law of diffusion
c. Kirchhoff's law
d. Fick's law
e. None of the above
Q. The value of the product of molecular weight and the gas characteristic constant for all gases in kgf m/1 kg mol ?K is
a. 848
b. 427
c. 770
d. 29.27
e. 30
Q. Isentropic flow is
a. Perfect gas flow
b. Reversible adiabatic flow
c. Ideal fluid flow
d. Irreversible adiabatic flow
e. Frictionaless reversible flow