Question # 1

What refer by the ability of steel to be hardened through to its centre in large section?

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Malleability

Hardenability

Ductility

Rigidity

The main constituents of ___________ are boron oxide and silica.

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Pyrex glass

Low silica glass

Soda lime glass

Super hard glass

What is called black gold.

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Petroleum

Coal

Coal tar

Natural gas

Granulated sugar contains _____________% sucrose

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80

99.30

60

90

The melting of nearly all glass is done in a continuous tank furnace. which operates steadily over periods of up to.

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a day

a month

a year

None of these

The wear-resistance of the material is attributed to its ability on ________ that is the hardness is increased greatly when the steel is cold worked.

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Cold harden

Stress harden

Strain harden

Cool temperature

Which type of the coal preferred for metallurgical coal.

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Lignite

Peat

Bituminous coal

None of these

Petrol can be saved by

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Driving at a constant and moderate speed

Ensuring correct type pressure

Switching off the engine at traffic lights

All of these

Which of the following is a component of soap.

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Sodium sulphate

Sodium stearate

Sodium chloride

Sodium bromide

The cooling of molten urea by air in the tower is called.

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Prilling

Evaporation

Condensation

Distillation

What is prefix in steel identification means it is made in an electric furnaced.

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E

H

B

Z

The chrome molybdenum steels contain how many percent of molybdenum

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0.10

0.20

0.30

0.40

The composition of mixture of clay and lime stone in the raw for cement material is.

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75% lime stone and 25% clay

25% lime stone and 75% clay

15% lime stone and 55% clay

30% limes stone and 79% clay

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

What is the colour of pulp obtained from chemical pulping.

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Black

Brown

Blue

Red

During sintering densification is not due to

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Atomic diffusion

Surface diffusion

Bulk diffusion

Surface tenstion

Which of the following statements is NOT true .

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About 10% of the earth's crust is iron

Pure iron does not have significant industrial use because it is too weak and soft.

Steel in an alloy of carbon and iron with limits on the amount of carbon

None of above

Not a major contributor of engineering ceramics

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SiC

SiO2

Si3N4

BH3

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