Top 250+ Solved Engineering Thermodynamics MCQ Questions Answer
Q. Charle's law states that if any gas is heated at constant pressure, its volume
a. a) changes directly as it absolute temperature
b. b) changes inversely as its absolute temperature
c. c) changes as square of the absolute temperature
d. d) does not change with absolute temperature
Q. The equation of state of an ideal gas is a relationship between the variables:
a. a) pressure & volume
b. b) pressure & temperature
c. c) pressure, volume & temperature
d. d) none of the above
Q. Joule's law states that the specific internal energy of a gas depends only on
a. a) the pressure of the gas
b. b) the volume of the gas
c. c) the temperature of the gas
d. d) none of the above
Q. ………. Law states that equal volume of all gases, at the same temperature & pressure, contains equal number ofmolecules
a. a) boyle\s
b. b) gay-lussac
c. c) avogadro
d. d) charle\s
Q. The change of entropy is considered to be……… when heat is absorbed by the gas
a. a) positive
b. b) negative
c. c) zero
d. d) none of the above
Q. ………. Is one in which neither any heatenters nor leaves the system
a. a) isochoric process
b. b) isobaric process
c. c) isentropic process
d. d) isothermal process
Q. Entropy of the universe
a. a) tends to zero
b. b) tends to a minimum
c. c) tends to a maximum
d. d) none of the above
Q. A gas can never be liquid
a. a) above criticaltemperature
b. b) when it is diatomic
c. c) when it is impure
d. d) above roomtemperature
Q. Which of the following remains constant during an adiabatic expansion
a. a) entropy
b. b) temperature
c. c) internal energy
d. d) none of the above
Q. In which of the following processes thechange in internal energy of a gas is equal to the work done
a. a) adiabatic process
b. b) isothermal process
c. c) constant volume process
d. d) constant pressure process
Q. The specific heat of a gas is a function of
a. a) temperature only
b. b) temperature & pressure
c. c) temperature & entropy
d. d) temperature, pressure& entropy
Q. In a Carnot cycle which of the followingprocessez must be carried out at extremely slow speed?
a. a) isothermal compression
b. b) adiabatic expansion
c. c) adiabatic compression
d. d) none of the above
Q. In case of real gases, cp will be equal tocv
a. a) at absolute zero
b. b) at triple point
c. c) at critical temperature
d. d) above criticaltempeature
Q. The physical properties of a perfect gas are controlled by which of the followingvariables?
a. a) volume
b. b) temperature
c. c) pressure
d. d) all of the above
Q. Universal gas constant is defined as equal to product of the molecular weight of thegas &
a. a) gas constant
b. b) specific heat at constant volume
c. c) specific heat a constant pressure
d. d) ratio of two specific heats