Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. According to kinetic theory of heat
a. Temperature should rise during boiling
b. Temperature should fall during freezing
c. At low temperatures all bodies are in solid state
d. At absolute zero there is absolute no vibration of molecules
e. None of the above
Q. Balanced draft incorporates
a. Forced draft
b. Induced draft
c. Forced and induced draft
d. Chimney draft only
e. None of the above
Q. The internal energy of an ideal gas is
a. A function of temperature alone
b. A function of pressure
c. A function of volume
d. (a) and (b) only
e. All the above
Q. In any process the maximum amount of mechanical energy that can be converted to heat
a. Depends upon the intake and exhaust temperature
b. Is 50%
c. Depends upon the amount of friction
d. Depends upon whether kinetic energy is involved
e. Is 100%
Q. The characteristic equation of gases pv = nRT holds good for
a. Real gases
b. Monoatomic gases
c. Diatomic gases
d. Ideal gases
e. Mixture of gases
Q. The external work donw is zero all the following cases EXCEPT
a. Pulsejet
b. Constant volume
c. Isothermal
d. Free expansiton
e. Throttling
Q. If a process can be stopped at any stage and reversed so that the system and surroundings are exactly restored to their initial states, it is known as
a. Isothermal process
b. Thermodynamic process
c. Ideal process
d. Adiabatic process
e. Reversible process
Q. Which of the following does not change during an-ideal throttling process?
a. Pressure, volume and temperature
b. Enthalpy
c. Pressure and volume
d. Temperature and pressure
e. Enthalpy and temperature
Q. The process in which no heat enters or leaves the system is called
a. Isobaric
b. Isothermal
c. Isentropic
d. Isochoric
e. None of the above
Q. Which is incorrect statement about the reversible process?
a. A reversible process is ideal
b. A reversible process must pass through a continuous series of equilibrium states
c. A reversible process when undone, will leave no history of the events in the surroundings
d. A reversible process must pass through the same states on the reversed path as were initially visited on the forward path
e. None of the above
Q. For water which of the following will be reduced to zero at critical pressure?
a. Specific volume
b. Enthalpy
c. Internal energy
d. Latent heat of vaporisation
e. None of the above
Q. In case of centrifugal compressors, the phenomenon of air stream not able to follow the blade contour of an axial compressor is known as
a. Stalling
b. Feedback
c. Regeneration
d. Recirculation
e. Surging
Q. If the rate of heat flow in aboves case remains constant, the ratio of temperature difference (?t1) (?t2) would be
a. 16 ; 1
b. 1 ; 4
c. 8 ; 1
d. 1 ; 16
e. 1 ; 8
Q. The ratio of heat flow QA/QB from two walls of same thickness having thermal conductivity kA = 2 kB, for the same temperature difference will be
a. 1
c. 2
d. 0.5
e. None of the above
Q. Adiabatic bulk modulus is Y times the isothermal bulk modulus
a. Pulsejet
b. for liquids only
c. for real gases only
d. for perfect gases only
e. for all fluids