Combustion and Flame (CBSE Class-8 Science): Questions 1 - 8 of 33

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Question number: 1

» Combustion and Flame » Types of Combustion » Spontaneous Combustion

MCQ▾

Question

Combustion is caused by the rapid union of oxygen with hydrogen or carbon in the oil or coal is called as:

Choices

Choice (4) Response

a.

Explosion

b.

Rapid explosion

c.

Spontaneous combustion

d.

None of the above

Question number: 2

» Combustion and Flame » Fire » Fire Extinguisher

MCQ▾

Question

A device used to stop fire is called:

Choices

Choice (4) Response

a.

Rapid combustion

b.

Fire extinguisher

c.

Sand bucket

d.

Ideal fuel

Question number: 3

» Combustion and Flame » Fire » Fire Extinguisher

MCQ▾

Question

Fire extinguishers used at airports and petrol pumps based on the principle of:

Choices

Choice (4) Response

a.

Cooling the fire

b.

Smothering the fire

c.

Question does not provide sufficient data or is vague

d.

None of the above

Question number: 4

» Combustion and Flame » Combustion » Inflammable Substances

MCQ▾

Question

The substances with low ignition temperature are called as:

Choices

Choice (4) Response

a.

Flammable substance

b.

Fuel

c.

Inflammable substance

d.

All of the above

Question number: 5

» Combustion and Flame » Fuel » Burning of Fuels Leads to Harmful Products

MCQ▾

Question

Harmful gases released during combustion are:

Choices

Choice (4) Response

a.

Water gas

b.

Carbon monoxide, carbon dioxide

c.

Hydrogen, nitrogen,

d.

Producer gas

Question number: 6

» Combustion and Flame » Fuel » Introduction to Fuel

MCQ▾

Question

Substances used for producing heat energy are called as:

Choices

Choice (4) Response

a.

Fire

b.

Flame

c.

Combustion

d.

Fuel

Question number: 7

» Combustion and Flame » Types of Combustion » Rapid Combustion

MCQ▾

Question

Combustion occurs rapidly is called as:

Choices

Choice (4) Response

a.

Spontaneous combustion

b.

Rapid combustion

c.

Explosion

d.

None of the above

Question number: 8

» Combustion and Flame » Combustion » Combustible Substances

MCQ▾

Question

Combustible substance:

Choices

Choice (4) Response

a.

It may be in the form of solid, liquid or gas

b.

Is the fuel which undergoes combustion

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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