Engineering Thermodynamics MCQs

Question 1

One molecule of oxygen consists of __________ atoms of oxygen.

Accepted Answer

2

Answer

4

Answer

8

Answer

16

Question 2

Which of the following has the highest calorific value?

Accepted Answer

Anthracite coal

Answer

Bituminous coal

Answer

Peat

Answer

Lignite

Question 3

Which of the following gas has the highest calorific value?

Accepted Answer

Coal gas

Answer

Producer gas

Answer

Mond gas

Answer

Blast furnace gas

Question 4

Carbonization of coal consists of

Accepted Answer

None of the above

Answer

Drying and crushing the coal to a fine powder

Answer

Moulding the finely ground coal under pressure with or without a binding material

Answer

Heating the wood with a limited supply of air to temperature not less than 280°C

Question 5

The value of cp/cv for air is

Accepted Answer

1.4

Answer

1

Answer

1.45

Answer

2.3

Question 6

When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency

Accepted Answer

Zero

Answer

$$\frac{1}{4}$$

Answer

$$\frac{1}{5}$$

Answer

2

Question 7

A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as

Accepted Answer

Thermodynamic cycle

Answer

Irreversible cycle

Answer

Reversible cycle

Answer

None of these

Question 8

The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as

Accepted Answer

Molecule

Answer

Element

Answer

Compound

Answer

Atom

Question 9

The amount of heat generated per kg of fuel is known as

Accepted Answer

Calorific value

Answer

Heat energy

Answer

Lower calorific value

Answer

Higher calorific value