Engineering Thermodynamics MCQs

Question 1

All perfect gases change in volume by $${\frac{1}{{273}}^{{	ext{th}}}}$$ of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

Accepted Answer

Charle's law

Answer

Boyle's law

Answer

Gay-Lussac law

Answer

Joule's law

Question 2

Which of the following statement is wrong?

Accepted Answer

In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.

Answer

The closed cycle gas turbine plants are external combustion plants.

Answer

The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.

Answer

In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.

Question 3

A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as

Accepted Answer

Cracking

Answer

Carbonization

Answer

Fractional distillation

Answer

Full distillation

Question 4

The process is adiabatic, if the value of n in the equation pvn = C, is

Accepted Answer

γ

Answer

Zero

Answer

One

Answer

∝

Question 5

First law of thermodynamics furnishes the relationship between

Accepted Answer

Heat, work and properties of the system

Answer

Heat and work

Answer

Various properties of the system

Answer

Various thermodynamic processes

Question 6

The measurement of a thermodynamic property known as temperature is based on

Accepted Answer

Zeroth law of thermodynamics

Answer

First law of thermodynamics

Answer

Second law of thermodynamics

Answer

None of these

Question 7

Measurement of temperature is based on

Accepted Answer

Zeroth law of thermodynamics

Answer

Thermodynamic properties

Answer

First law of thermodynamics

Answer

Second law of thermodynamics

Question 8

The basis for measuring thermodynamic property of temperature is given by

Accepted Answer

Zeroth law of thermodynamics

Answer

First law of thermodynamics

Answer

Second law of thermodynamics

Answer

Third law of thermodynamics

Question 9

The absolute zero temperature is taken as

Accepted Answer

-273°C

Answer

237°C

Answer

-237°C

Answer

273°C