Question # 1

Which one of the following mixture of gases is required in gas welding?

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Oxygen and ethylene

Oxygen and hydrogen

Acetylene and oxygen

Acetylene and hydrogen

Which of the following contains high content of lead?

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Low octane fuel

High octane fuel

Cooking gas

Coal

Which was the first company in the world to manufacture computers for commercial use ?

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Remington Rand

IBM

Hewlett-Packard

Apple computers

Which of the following is a chemical change?

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Evaporation of water

Burning of candle

Glowing of an electric bulb

Liquefaction of air

If we multiply force by its duration what quantity will we get?

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work

Energy

Impulse

momentum

The magnetic effect of electric current was first observed by:

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Henry

Oersted

Faraday

Volta

Which device converts electrical energy into sound energy?

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Generator

Steam engine

Electrical Motor

Loudspeaker

The gases which are used by divers as an artificial atmosphere are helium and:

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Nitrogen

Oxygen

Carbon monoxide

Neon

The function of DNA in the body is

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To help in the synthesis of proteins

To control the heredity

To assist in the release of energy

None of these

What caused Louis Braille' blindness

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Accidents injury by a sharp object

he was born blind

Smallpox

Scarlet fever

How many 'baby teeth' (primary) teeth do children have?

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20

28

24

32

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