Engineering Thermodynamics MCQs

Question 1

In a free expansion process,

Accepted Answer

All of these

Answer

W1 - 2 = 0

Answer

Q1 - 2 = 0

Answer

dU = 0

Question 2

The efficiency of the Carnot cycle may be increased by

Accepted Answer

Increasing the highest temperature

Answer

Decreasing the highest temperature

Answer

Increasing the lowest temperature

Answer

Keeping the lowest temperature constant

Question 3

Carnot cycle efficiency is maximum when

Accepted Answer

Final temperature is 0°K

Answer

Initial temperature is 0°K

Answer

Difference between initial and final temperature is 0°K

Answer

Final temperature is 0°C

Question 4

The efficiency of Diesel cycle depends upon

Accepted Answer

Cut-off ratio and compression ratio

Answer

Pressure ratio

Answer

Temperature limits

Answer

Compression ratio

Question 5

The work ratio of simple gas turbine cycle depends upon

Accepted Answer

All of these

Answer

Maximum cycle temperature

Answer

Minimum cycle temperature

Answer

Pressure ratio

Question 6

The efficiency of Carnot cycle depends upon

Accepted Answer

Temperature limits

Answer

Volume compression ratio

Answer

Cut-off ratio and compression ratio

Answer

Pressure ratio

Question 7

One kg of hydrogen requires 8 kg of oxygen and produces

Accepted Answer

9 kg of water

Answer

1 kg of water

Answer

7 kg of water

Answer

8 kg of water

Question 8

One kg of carbon monoxide requires $$\frac{4}{7}$$ kg of oxygen and produces

Accepted Answer

$$\frac{{11}}{7}$$ kg of carbon dioxide gas

Answer

$$\frac{{11}}{3}$$ kg of carbon dioxide gas

Answer

$$\frac{7}{3}$$ kg of carbon monoxide gas

Answer

$$\frac{8}{3}$$ kg of carbon monoxide gas