Engineering Thermodynamics MCQs

Question 1

In an extensive property of a thermodynamic system

Accepted Answer

None of these

Answer

Extensive heat is transferred

Answer

Extensive work is done

Answer

Extensive energy is utilized

Question 2

The more effective way of increasing efficiency of Carnot engine is to

Accepted Answer

Decrease lower temperature

Answer

Increase higher temperature

Answer

Decrease higher temperature

Answer

Increase lower temperature

Question 3

The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents

Accepted Answer

Either heat absorbed or heat rejected

Answer

Heat absorbed

Answer

Heat rejected

Answer

None of these

Question 4

The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents

Accepted Answer

Either (A) or (B)

Answer

Heat absorbed

Answer

Heat rejected

Answer

None of these

Question 5

The main cause for the irreversibility is

Accepted Answer

All of the above

Answer

Unrestricted expansion

Answer

Mechanical and fluid friction

Answer

Heat transfer with a finite temperature difference

Question 6

The isothermal and adiabatic processes are regarded as

Accepted Answer

Reversible process

Answer

Irreversible process

Answer

Reversible or irreversible process

Answer

None of these

Question 7

An adiabatic process is one in which

Accepted Answer

All of the above

Answer

The temperature of the gas changes

Answer

No heat enters or leaves the gas

Answer

The change in internal energy is equal to the mechanical work done

Question 8

Isochoric process is one in which

Accepted Answer

No mechanical work is done by the system

Answer

Free expansion takes place

Answer

Very little mechanical work is done by the system

Answer

All parameters remain constant

Question 9

Kelvin Planck's law deals with

Accepted Answer

Conversion of heat into work

Answer

Conservation of heat

Answer

Conservation of work

Answer

Conversion of work into heat