Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. The processes or systems that do not involve heat are called
a. Adiabatic processes
b. Steady processes
c. Equilibrium processes
d. Thermal processes
e. Isothermal processes
Q. Which of the following is the best fuel for diesel engines?
a. Olefins
b. Pulsejet
c. Aromatics
d. Naphthenes
e. Paraffins
Q. Air leaking from a punctured tube is an example of
a. Throttling
b. Constant volume expansion
c. Adiabatic expansion
d. Constant pressure expansion
e. Isothermal expansion
Q. The percentage of carbondioxide in the exhaust gases from a diesel engine cannot exceed
a. 40%
b. 50.50%
c. 29%
d. 36%
e. 55%
Q. Internal energy of a perfect gas depends on
a. Temperature, specific heats and entropy
b. Temperature, specific heats and pressure
c. Temperature, specific heats and enthalpy
d. Temperature and specific heats
e. Temperature only
Q. The process during which external work done is not zero, is
a. Constant volume process
b. Constant pressure process
c. Throttling
d. Free expansion
e. All of the above
Q. Which of the following cycle consists of two isothermal and constant volume processes?
a. Joule cycle
b. Diesel cycle
c. Rankine cycle
d. Otto cycle
e. Ericsson cycle
Q. A perfect black body is
a. One which absorbs all radiant energy at all wavelengths
b. One which does not reflect the radiant energy
c. Black in colour
d. One through which radiant energy is not transmitted
e. One which absorbs total radiant energy
Q. The characteristics of a control volume are
a. There is no material flow across the boundary
b. The volume, shape and position with respect to an observer may change
c. Pulsejet
d. The volume, shape and position with respect to an observer are fixed
Q. By doubling the temperature the radiant heat will increase
a. 16 times
b. microns
c. 4 times
d. 8 times
e. 2 times
Q. Which of the following is not a property of the system
a. Temperature
b. Pressure
c. Specific volume
d. Heat
e. None of the above
Q. The mixture formation in a carburettor is based on the principle of
a. Venturi principle
b. Pascal's law
c. Law of vapours
d. Daltons law
e. Newtons law of motion
Q. Heating wet steam at constant temperature is same as heating at
a. Constant pressure
b. Constant volume
c. Constant enthalpy
d. Constant entropy
e. None of the above
Q. A liquid flowing through a tube is turbulent. In which case will the maximum change in heat transfer coefficient occur?
a. Diameter of the tube is increased 4 time maintaining the ratio of liquid flow constant
b. Diameter of the tube is increased 4 times maintaining the velocity of flow constant
c. Diameter of the tube is increased 2 times maintaining the rate of liquid flow constant
d. Diameter of the tube is increased 2 times maintaining the velocity of flow constant
e. microns