ABHYAS | Self Learning | Testing Platform

Q.1

The heat produced by burning 1 kg of fuel completely is known as ____________________________.

A.

Heat capacity

B.

Calorific value

C.

Vapour density

D.

Boiling point

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Q.2

Flame that gives blue colour to the flame is called as _____________________.

A.

Luminous flame

B.

Non Luminous flame

C.

White flame

D.

None of the above

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Q.3

Types of combustion are _______________________

A.

Rapid

B.

Spontaneous, rapid and explosive

C.

Explosive

D.

Spontaneous

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Q.4

Fire can be controlled or extinguished by ________________________

A.

Removing any combustible materials near the region of fire.

B.

Cutting off the supply of air by using sand or blanket.

C.

Bringing down the ignition temperature by using water.

D.

All of the above

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Q.5

Which type of fire extinguisher is used to extinguish fire caused by burning oil and petrol ?

A.

Foam type

B.

Water type

C.

Soda acid type

D.

$CCI_4$ type

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Q.6

Which of the following substance do not give flame on burning ?

A.

Coal

B.

Kerosene

C.

Charcoal

D.

Both A and B

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Q.7

Types of combustion are _____________.

A.

Rapid and slow

B.

Spontaneous, Rapid, explosion

C.

Explosive and steady

D.

Spontaneous and irregular

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Q.8

The flame which do not leave behind any flame is called as ___________________

A.

Luminous flame

B.

Non Luminous flame

C.

Bright flame

D.

Light flame

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Q.9

For heating, the more suitable flame is _________________

A.

Luminous flame

B.

Non - luminous flame

C.

Dark flame

D.

Bright flame

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Q.10

On introducing a clean glass plate/slide into the luminous zone of the flame, a circular blackish ring is formed on the glass plate/slide. This is due to the ________________

A.

Deposition of carbon particles in the Glass slide

B.

Deposition of unburnt carbon particles present in the luminous zone of the flame.

C.

Deposition of burnt carbon particles present in the luminous zone of the flame.

D.

Due to the oxygen supply.

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Attention !!!!!