Question # 1

___________ surfactants perform well over a wide range of water hardness and pH.

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Anionic

Cationic

Nonionic

Neutral

While compacting the concrete by a mechanical vibrator, the slump should not exceed.

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2.5 cm

10 cm

3.1 cm

5.0 cm

Argillaceous material does not include.

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Vlay

Marine shells

Slate

Blast furnace slag

Which of the following does NOT react with sodium hydroxide solution.

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Fat

Vinegar

Ethanol

Water

Steel that are used for axles, gears, and similar parts requiring medium to high and strength are known as.

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Medium carbon steel

Low carbon steel

Very high carbon

High carbon steel

What nickel alloy has high electrical and corrosion resistance and high strength at red heat temperature and contain 15 to 20% chromium.

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Alnico

Nichrome

Invar

None of above

Which of following is used as make up chemical in Kraft process.

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Na2CO3

KCl

Na2SO4

NaOH

Major ingredients of traditional ceramics

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Silica

Clay

Feldspar

All

Which of the following is NOT true 7 ceramic materials are.

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Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon

Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.

Purpose of sizing is.

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To increase the strength

To improve formation

To increase resistance toward water

To remove wastes

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

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20

25

30

None of these

The special chrome steels of the stainless variety contain how many percent of chromium.

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4 to 8

11 to 17

9 tp 10

12 to 15

Not a Characteristic property of ceramic material

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High temperature stability

High mechanical strength

Low elongation

Low hardness

The liquor is screened to exclude ________ material

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Fibrous

Polymers

Maltose

Sucrose

Fats and oil are_____________

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Acids

Alcohols

Salts

Base

What ASTM test for compression is designated for plastics.

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D 638

D 695

D 790

D 732

What refer to the casehardening process by which the carbon content of the steel ear the surface of a part is increased?

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Carburizing

Annealing

Normalizing

None of these

The nutrients which are required in very small amount for the normal growth of plants are called.

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Nitrogenous fertilizers

Micronutrients

Phosphorus fertilizer

All of the above

Which of the following give higher fibre strength.

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Eucalyptus

Pine

Bagnasse

Sugar cane

Most commercial glasses consist of

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Lime

Soda

Silica

All

The number of Glass products now manufactured is.

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25,000

75,000

50,000

All of these

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