Engineering Thermodynamics MCQs

Question 1

The first law of thermodynamics is the law of

Accepted Answer

Conservation of energy

Answer

Conservation of mass

Answer

Conservation of momentum

Answer

Conservation of heat

Question 2

Stirling and Ericsson cycles are

Accepted Answer

Reversible cycles

Answer

Quasi-static cycles

Answer

Semi-reversible cycles

Answer

Irreversible cycles

Question 3

The behavior of super-heated vapour is similar to that of

Accepted Answer

Perfect gas

Answer

Air

Answer

Steam

Answer

Ordinary gas

Question 4

Which of the following has the minimum atomic mass?

Accepted Answer

Carbon

Answer

Sulphur

Answer

Nitrogen

Answer

Oxygen

Question 5

The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is

Accepted Answer

848 kgfm/mol °K

Answer

29.27 kgfm/mol °K

Answer

8314 kgfm/mol °K

Answer

427 kgfm/mol °K

Question 6

The value of gas constant (R) in S. I. units is

Accepted Answer

287 J/kgK

Answer

0.287 J/kgK

Answer

2.87 J/kgK

Answer

28.7 J/kgK

Question 7

In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

Accepted Answer

Isentropic

Answer

Isothermal

Answer

Polytropic

Answer

None of these

Question 8

The hard coke is obtained when carbonization of coal is carried out at

Accepted Answer

900° to 1100°C

Answer

500° to 700°C

Answer

700° to 900°C

Answer

300° to 500°C

Question 9

The unit of energy is S. I. units is

Accepted Answer

Joule (J)

Answer

Joule meter (Jm)

Answer

Watt (W)

Answer

Joule/meter (J/m)