Wood is the main raw material for the manufacture of _______?

A: Gun powder

B: Paint

C: Paper

D: Ink

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Paper

Rectified spirit contains alcohol about ?

A: 95%

B: 80%

C: 70%

D: 85%

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95%

All of the following are electromagnetic radiations except_____?

A: Sound waves

B: Red light

C: X-Rays

D: Photon

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Sound waves

For being able to see three-dimensional pictures we have to use____?

A: A camera

B: A binocular

C: An epidiascope

D: A stereoscope

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A stereoscope

A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?

A: 60 miles per sec

B: 25 miles per sec

C: 7 miles per sec

D: 10 miles per sec

E: None of these

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7 miles per sec

If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called____?

A: Quenching

B: Annealing

C: Tempering

D: Nitriding

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Annealing

Second layer of Earth’s atmosphere is_____?

A: Mesosphere

B: Stratosphere

C: Troposphere

D: Thermosphere

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Stratosphere

Silver fish is the name of_____?

A: Fish

B: Insect

C: Bird

D: Mammal

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Insect

The gradual physiological adjustment to slowly changing new environmental conditions is known as ______?

A: Introduction

B: Selection

C: Acclimatization

D: Quarantine

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Acclimatization

Coke is made by heating coal in the absence of air at_____?

A: 900 °C

B: 700 °C

C: 1300 °C

D: 1700 °C

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1300 °C

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