Engineering Thermodynamics MCQs

Question 1

Addition of heat at constant pressure to a gas results in

Accepted Answer

Raising its temperature and doing external work

Answer

Raising its temperature

Answer

Raising its pressure

Answer

Raising its volume

Question 2

Which of the following items is not a path function?

Accepted Answer

Thermal conductivity

Answer

Heat

Answer

Work

Answer

Kinetic energy

Question 3

An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

Accepted Answer

Impossible

Answer

Feasible

Answer

Possible

Answer

Possible, but with lot of sophistications

Question 4

The absolute zero pressure can be attained at a temperature of

Accepted Answer

-273°C

Answer

0°C

Answer

273 K

Answer

None of these

Question 5

Molecular volume of any perfect gas at 600 × 103 N/m2 and 27°C will be

Accepted Answer

4.17 m3/kg mol

Answer

400 m3/kg mol

Answer

0.15 m3/kg mol

Answer

41.7 m3/kg mol

Question 6

For the same maximum pressure and temperature,

Accepted Answer

Diesel cycle is more efficient than Otto cycle

Answer

Otto cycle is more efficient than Diesel cycle

Answer

Dual cycle is more efficient than Otto and Diesel cycles

Answer

Dual cycle is less efficient than Otto and Diesel cycles

Question 7

Mixture of ice and water form a

Accepted Answer

Heterogeneous system

Answer

Closed system

Answer

Open system

Answer

Isolated system

Question 8

The entropy may be expressed as a function of

Accepted Answer

All of these

Answer

Pressure and temperature

Answer

Temperature and volume

Answer

Heat and work

Question 9

A molecule consisting of one atom is known as

Accepted Answer

Mono-atomic

Answer

Di-atomic

Answer

Tri-atomic

Answer

Poly-atomic