Question # 1

What corrosion occurs under organic coating on metals as fine wavy hairlines?

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Stray current corrosion

Microbiological corrosion

Filiform corrosion

Simple corrosion

LPG is use this

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Vehicles

Aviation Fuel

Home

All above

________is best in its cleaning action.

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Soap

Detergents

Surfactant

None of these

Granulated sugar contains _____________% sucrose

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80

99.30

60

90

The percentage of nitrogen in ammonia is _______________%

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32

82

25

55

Fats and oil are_____________

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Acids

Alcohols

Salts

Base

Not a Characteristic property of ceramic material

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High temperature stability

High mechanical strength

Low elongation

Low hardness

The alkaline hydrolysis of fat is know as

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Condensation

Esterification

Saponification

Emulsification

In glass making the whole combination of ingredients is called a.

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Gangue

Batch

Mixture

None of these

Soapy detergents and soapless detergents behave differently in hard water because they

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Have different hydrophilic heads

Have different hydrophobic hydrocarbon chains

Have different pH values

Above A and C both

Purpose of sizing is.

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To increase the strength

To improve formation

To increase resistance toward water

To remove wastes

What prefix in steel identification means composition varies from normal limits.

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E

B

X

F

Which of the following statement is not true in case of catalytic reforming.

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High temperature results in loss of reformate yield

High naphthenic stock require high space velocity

Presence of water decrease the hydrocracking activity.

None of above

In Pakistan how many units are involved to the production of glass.

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20

25

30

None of these

What is the effect of aluminum in cast iron.

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To increase hardness above 0.5 %

To deoxidize molten cast iron

To affect machinability, ductility and shrinkage depending on form

Both A and B

Which treatment is done with pulp before delivering it to paper making machine.

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Pulp is disperse din water to make slurry

Mechanical refining or heating of the fibers

Addition of chemical additives and recycled fibres from the waste paper plant

All above

What group of steels are molybdenum high sped steels.

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Group A

Group D

Group M

Group H

In Pakistan the total production of glass is over ________ tons per year.

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800

8000

80,000

None of these

Which cast iron is hard and wear resistant.

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Grey iron

White iron

Melleable iron

None of these

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

The substance added to the soil to provide one or more nutrient elements essential for plants growth are called.

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Growth hormones

Fertilizers

Salts

Minerals

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