Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. Which of the following cycle consists of two isothemal and two constant volume processes?
a. Joule cycle
b. Stirling cycle
c. Diesel cycle
d. Rankine cycle
e. Otto cycle
Q. The statement that energy can be neigher created nor destroyed but only converted from one form to another, is known as
a. Zerothlaw of thermodynamics
b. Second law of thermodynamics
c. First law of theormodynamics
d. Avogadro's hypothesis
e. Kinetic theory of gases
Q. Avogadro's numbers is
a. 60248.6 x 1026 molecules/(k mol)
b. 6024.86 x 1026 molecules/(k mol)
c. 6.02486 x 1026 molecules/(k mol)
d. 60.2486 x 1026 molecules/(k mol)
e. 602.486 x 1026 molecules/(k mol)
Q. The triple point of a substance is the temperature and pressure at which
a. The solid and liquid phases are in equilibrium
b. The liquid and gaseous phases are in equilibrium
c. The solid, liquid and the gaseous phases are in equilibrium
d. The solid does not melt, the liquid does not boil and the gas does not condense
e. Temperature shows the extent of expansion
Q. During the boiling of a liquid, which of the following parameter increases?
a. Temperature
b. Free energy
c. Entropy
d. Heat of vaporisation
e. None of the above
Q. For a closed system, the difference between the heat added to the system and the work done by the system is equal to the change in
a. entropy
b. enthalpy
c. internal energy
d. Pulsejet
e. temperature
Q. The area inside the PV diagram for a diesel engine represents
a. heat supplied
b. work done
c. work supplied
d. Pulsejet
e. change in entropy
Q. In case of ideal monoatomic gas, the ratio of specific heats Cp/Cv would be
a. 1
b. 1.67
c. 1.41
d. 1.4
e. 1.33
Q. Triple point temperature and pressure for water are
a. 0.1?C and 0.006028 ata
b. 100?C and 1 ata
c. 0.01?C and 0.006028 ata
d. 0?C and 0.1 ata
e. 0?C 1 ata
Q. The shape of the lid of manhole in a boiler is
a. Circular
b. Elliptical
c. Rectangular
d. Square
e. Special contour
Q. The process in which the change in internal energy of a gas is equal to the work done is known as
a. adiabatic process
b. isochoric process
c. isobaric process
d. isothermal process
e. Pulsejet
Q. During an adiabatic expansion the increase in volume is associated with
a. Decrease in pressure and decrease in temperature
b. Increase in pressure and decrease in temperature
c. Depends on other factors
d. Increase in pressure and increase in temperature
e. Decrease in pressure and increase in temperature
Q. In six stage compression of air set for minimum work conditions
a. Pressure rise per stage will be equal
b. Cylinder volumes will be same
c. The discharge pressure will be six times suction pressure
d. Temperature rise in the cylinders will be the same
e. Work done in successive stages will be in geometrical progression