Top 250+ Solved Engineering Thermodynamics MCQ Questions Answer
Q. All engineering process, strictly speakingare
a. a) reversible cycle
b. b) irreversible
c. c) quasti-static
d. d) thermodynamically inequillibrium
Q. Isothermal, isobaric, isochoric & adiabatic processes, under ideal condition, are ….Processes
a. a) thermodynamic
b. b) stable
c. c) dynamic
d. d) quasi-static
Q. Change of entropy depends upon whichof the following?
a. a) change of heat
b. b) change of specific heats
c. c) change of pressure &volume
d. d) none of the above
Q. In a reversible adiabatic process headadded is equal to
a. a) zero
b. b) positive value
c. c)
d. d)
Q. During a throttling process
a. a) exchange of heat doesnot take place
b. b) expandingsteam does nowork
c. c) internal energy of steamdoes not change
d. d) all of the above
Q. Under which of the following conditionsall gases behave ideally?
a. a) high pressure conditions
b. b) law pressure conditions
c. c) vaccum conditions
d. d) all of the aboveconditions
Q. Internal energy & enthalpy of an ideal gasare functions of
a. a) pressure only
b. b) temperature only
c. c) specific volume only
d. d) temperature & pressure
Q. When two gases suddenly mix up with each other then resultant entropy of thesystem will
a. a) remain unaltered
b. b) decrease
c. c) increase
d. d) becomes zero
Q. On which of the following factors does air standard efficiency of a diesel cycledepend?
a. a) adiabatic compression ratio
b. b) ratio of specific heats
c. c) cut-off ratio
d. d) all of the above
Q. Regarding enthalpy which of the following statements is incorrect?
a. a) it is the function of specific heat at constantvolume
b. b) it is the extensive property of the system
c. c) it is the sum of internal energy & the pressurevolume product
d. d) it is the same as heat transfer during constantpressure process
Q. Which of the following processes isreversible process?
a. a) throttling
b. b) adiabatic
c. c) isothermal
d. d) none of the above
Q. Which of the following processes arereversible processes?
a. a) isothermal & adiabatic
b. b) constant volume &constant pressure
c. c) hyperbolic & pv?= constant
d. d) none of the above
Q. For ……. The internal energy & enthalpy are the functions of temperature only
a. a) perfect gas
b. b) water in pipes surrounded by steam
c. c) saturated steam
d. d) superheated steam
Q. The index of compression n tends to reach ?(ratio of specific heats)
a. a) when process is isothermal
b. b) when process is isentropic
c. c) when process is isentropic & specific heat does not change with temperature
d. d) when flow is uniform & steady