Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. Which of the following cycle is less efficient as compared to the remaining?
a. Carnot cycle
b. All have identical efficiency
c. Stirling cycle
d. Ericsson cycle
e. Otto cycle
Q. At critical point the enthalpy of vaporisation is
a. Only dependent on temperature
b. Zero
c. Maximum
d. Minimum
e. None of the above
Q. In which of the following case the process of sublimation can occur?
a. Solid nitrogen
b. Solid carbondioxide
c. Liquid air
d. Solid oxygen
e. Sodium
Q. If a system neither exchange mass nor energy with the surroundings, it is known as
a. Semi-closed system
b. Isolated system
c. Inactive system
d. Closed system
e. Segregated system
Q. Food can be cooked quicker in a pressure cooker because
a. Less heat is lost
b. High pressure steam has high temperature
c. Steam remains within the cooker
d. It is made of a metal
e. None of the above
Q. A surface which diffusely reflects and emits tha same amount of energy which it receives by radiation, is known as
a. A perfect surface
b. A perfect grey surface
c. A perfect white surface
d. A perfect radiating surface
e. None of the above
Q. Exhaust gases from a engine possess
a. Chemical energy
b. Solar energy
c. Potential energy
d. Stored energy
e. Kinetic energy
Q. Which one of the following is an indirect reaction device?
a. Turbojet
b. Ramjet
c. Pulsejet
d. Propeller
e. All of the above
Q. Cetane number of a diesel fuel is a measure of its
a. volatility
b. Pulsejet
c. delay period
d. viscosity
e. ignition quality
Q. A thermistor is a
a. Thermocouple
b. Thermometer
c. Thermos flask
d. Miniature resistance
e. None of the above
Q. Which of the following is a reversible process?
a. Extension and compression of a spring
b. Diffusion
c. Free expansion
d. Throttling
e. Combustion
Q. According to Charle's law
a. At constant pressure the volume of a gas is proportional to its temperature
b. At constant pressure the volume of a gas is proportional to its absolute temperature
c. At constant gauge pressure the molecular folume of a gas is proportional to its absolute temperature
d. At constant volume the absolute pressure is proportional to absolute temperature
e. None of the above