Engineering Thermodynamics MCQs

Question 1

The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

Accepted Answer

1.5 Ru × T

Answer

Ru × T

Answer

2 Ru × T

Answer

3 Ru × T

Question 2

The general law for the expansion or compression of gases, is

Accepted Answer

pvn = C

Answer

pv = C

Answer

pv = mRT

Answer

$${	ext{p}}{{	ext{v}}^\gamma } = {	ext{C}}$$

Question 3

In an isothermal process

Accepted Answer

All of these

Answer

There is no change in enthalpy

Answer

There is no change in internal energy

Answer

There is no change in temperature

Question 4

The hyperbolic process is governed by

Accepted Answer

Boyle's law

Answer

Avogadro's law

Answer

Charle's law

Answer

Gay-Lussac law

Question 5

An isothermal process is governed by

Accepted Answer

Boyle's law

Answer

Gay-Lussac law

Answer

Charle's law

Answer

Avogadro's law

Question 6

When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

Accepted Answer

Thermodynamic process

Answer

Thermodynamic law

Answer

Thermodynamic cycle

Answer

None of these

Question 7

A cycle consisting of two isothermal and two isentropic processes, is known as

Accepted Answer

Carnot cycle

Answer

Stirling cycle

Answer

Ericsson cycle

Answer

Joule cycle

Question 8

Barometric pressure is equal to

Accepted Answer

760 mm Hg

Answer

Zero mm Hg

Answer

735.6 mm Hg

Answer

1 mm Hg

Question 9

Specific heat of air at constant pressure is equal to

Accepted Answer

1

Answer

0.17

Answer

0.21

Answer

0.24