Thermodynamics MCQ Questions Answers – Mechanical Engineering
1) In highly rarefied gases, the concept of this loses validity
a) Thermodynamic equilibrium
b) Continuum
c) Stability
d) macroscopic viewpoint
2) The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas.
a) one-half
b) one-third
c) two-third
d) three-fourth
3)The fundamental unit of enthalpy is
a) MLT-2
b) ML2T-1
c) ML2T-2
d) ML3T-2
4)Which of the following has the minimum atomic mass?
a) Oxygen
b) Sulphur
c) Nitrogen
d) Carbon
5)Which one of the following is extensive property of a thermodynamics system
a) Volume
b) Pressure
c) Temperature
d) Density
6)Temperature of a gas is produced due to
(a) its heating value
(b) kinetic energy of molecules
(c) repulsion of molecules
(d) attraction of molecules
(e) surface tension of molecules.
7) Zeroth law thermodynamics form the basis of measurement of
a) pressure
b) temperature
c) heat exchange
d) work
8)The condition of perfect vacuum, i.e., absolute zero pressure can be attained at
(a) a temperature of 273.16°C
(b) a temperature of 0°C
(c) a temperature of 273 °K
(d) a negative pressure and 0°C temperature
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9) Triple point temperature of water is
a) 273 K
b) 273.14 K
c) 273.15 K
d) 273.16 K
10)If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant
(a) volume
(b) pressure
(c) temperature
(d) enthalpy
(e) entropy.