Engineering Thermodynamics (3131905) MCQs

MCQs of Combustion

Showing 1 to 10 out of 25 Questions
1.

The principal constituents of a fuel are

(a)

Carbon and hydrogen

(b)

Oxygen and hydrogen

(c)

Sulphur and oxygen

(d)

Sulphur and hydrogen

Answer:

Option (a)

2.

Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

(a)

CO content

(b)

Dew point

(c)

CO₂ content

(d)

O₂ content

Answer:

Option (a)

3.

A fuel is substantce which release ______on combustion.

(a)

mechanical energy

(b)

magnetic energy

(c)

heat energy

(d)

chemical energy

Answer:

Option (c)

4.

A fuel is always react with_________during combustion and produced heat.

(a)

oxygen

(b)

water

(c)

nitrogen

(d)

carbon

Answer:

Option (a)

5.

During combustion__________always remains inert.

(a)

oxygen

(b)

hydrogen

(c)

nitrogen

(d)

carbon

Answer:

Option (c)

6.

Atmoshpheric air contains  oxygen_________by mass and___________by volume.

(a)

24%,22%

(b)

23.2%,21%

(c)

21.3%,23%

(d)

23%,21.3%

Answer:

Option (b)

7.

The molecular mass of oxygen is.......

(a)

12

(b)

14

(c)

16

(d)

32

Answer:

Option (d)

8.

The molecular mass of nitrogen is________.

(a)

24

(b)

23

(c)

27

(d)

28

Answer:

Option (d)

9.

The stochiometric air required for complte combustion of 1 kg of hydrogen is___________.

(a)

34.5

(b)

32.6

(c)

35.2

(d)

36.3

Answer:

Option (a)

10.

If 1 m3 of H2 combines with 2.38 m3 of air, it will give__________.

(a)

3.38 m3 of H2O

(b)

1 m3 of H2O

(c)

2.38 m3 of H2O

(d)

1.88 m3 of H2O

Answer:

Option (b)

Showing 1 to 10 out of 25 Questions