Thermodynamics Mcqs

This set of Mechanical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Thermodynamics ”. These questions are chosen from a collection of most authoritative and best reference books on Mechanical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Thermodynamics comprehensively.

0.17

0.21

0.24

1.0

1 law

2 laws

3 laws

4 laws

3. Boyle’s law i.e. pV = constant is applicable to gases under ___________________?

All ranges of pressures

Only small range of pressures

High range of pressures

4. The same volume of all gases would represent their____________________?

Densities

Specific weights

Molecular weights

Gas characteristic constants

Joule’s law

Boyle’s law

Regnault’s law

Gay-Lussac law

Charles’ law

6. According to Avogadro’s Hypothesis ______________________?

The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature

The sum of partial pressure of mixture of two gases is sum of the two

Product of the gas constant and the molecular weight of an ideal gas is constant

Gases have two values of specific heat

+ ve

-ve

Zero

Maximum

8. To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is____________________?

Divided by its molecular weight

Multiplied by its molecular weight

Multiplied by its density

Multiplied by its specific weight

9. An isolated system is one in which_____________________?

Mass does not cross boundaries of the system, though energy may do so

Neither mass nor energy crosses the boundaries of the system

Both energy and mass cross the boundaries of the system

Mass crosses the boundary but not the energy

Pressure

Temperature

Specific volume

Heat

11. Mixture of ice and water form a________________________?

Closed system

Open system

Isolated system

Heterogeneous system

21

23

25

73

13. Which of the following items is not a path function ____________________?

Heat

Work

Kinetic energy

Vdp

Thermal conductivity

14. Heat and work are ____________________?

Point functions

System properties

Path functions

Intensive properties

15. The value of n = 1 in the poly tropic process indicates it to be __________________?

Reversible process

Isothermal process