Question # 1

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

What is the scaling off of a surface in flakes or layers as the result of corrosion?

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Expoliation

Corrosion fatigue

Scaping

Fretting

The different types of glass are.

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A- glass, C-Glass, E-Glass and S-Glass

A-Glass, B-Glass, E-Glass, S-Glass

AR -Glass, C-Glass, E-Glass and S -Glass

A-B Glass

The by -product of the process of saponification is.

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Methanol

Glycol

Glycerol

Absolute alcohol

The following ceramic product is mostly used as pigment in paints.

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TiO2

SiO2

uo2

ZrO2

Not a Characteristic property of ceramic material

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High temperature stability

High mechanical strength

Low elongation

Low hardness

The following are primary alloying ingredients of Group H steel except.

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Malybdenum

Cobalt

Chromium

Tungsten

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

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20

25

30

None of these

Red brass contain about how many percent of zinc.

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20 %

15 %

30 %

25 %

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

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Na2CO3

KCl

Na2SO4

NaOH

Which of the following process is not sorbent separation technolgy.

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Penex

Parex

Molex

Olex

Which of the following cast irons is a high carbon, iron carbon silicon alloy.

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Deorizers

Deoxidizers

Deoxifiers

Deterrent

Chemical compounds which are added to reduce to reactivity of glass are called.

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Formers

Modifiers

Stabilizers

None of these

Which type of the coal preferred for metallurgical coal.

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Lignite

Peat

Bituminous coal

None of these

________is best in its cleaning action.

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Soap

Detergents

Surfactant

None of these

Aviation Fuel contains.

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Light Naphtha

Medium Naphtha

Kerosene

Diesel

Proper proportioning of concrete, ensures

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Resistance to water

Desired durability

Water tightens of the structure.

All

What field of study encompasses the procurement and production of metals.

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Metallury

Geology

Metagraphy

Nanochemistry

Ammonium nitrate is sold as a mixture with

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Soda Ash

Lime stone

Zinc

None of above

Which of the following are anionic detergents.

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Sodium salts of sulfonated long chain alcohol

Ester of stearic acid and polythlene glycol

Quaternary ammonium salt of amine with acetate ion

Sodium salts of sulfonated long chain hydrocarbons

Most commercial glasses consist of

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Lime

Soda

Silica

All

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