Question # 1

Ammonium nitrate is sold as a mixture with

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Soda Ash

Lime stone

Zinc

None of above

A steel cannot qualify for stainless prefix until it has at least how many percent of chromium.

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10 %

20 %

5 %

30 %

What type of steel has 0.8 % carbon and 100% pearlite.

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Austenite

Eutectoid

Hyper eutectoid

Silver steel

What is a coal that has been previously burned in an oxygen poor environment?

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Tuyere

Coke

Silver

Diamond

Aviation Fuel contains.

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Light Naphtha

Medium Naphtha

Kerosene

Diesel

The soap and detergent are source of organic pollutants like.

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Glycerol

Polyphosphates

Sulphonated hydrocarbons

All of these

Hydrolytic reaction of fat with caustic soda is known as ______

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Esterification

Saponification

Acetylation

Carboxylation

The by -product of the process of saponification is.

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Methanol

Glycol

Glycerol

Absolute alcohol

Bromine number is measure of.

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Paraffins

Unsaturates

Saturates

None of these

What is clinker.

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gypsum

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

What do you call earth and stone missed with the iron oxide

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Hematite

Gangue

Ore

Residue

What refers to the deterioration of material by oscillatory relative motion of small amplitude between two solid surfaces in a corrosive environment?

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Stray current corrosion

Microbiologicla corrosion

Fretting corrosion

None of these

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

What ASTM test for tension is designated for plastics.

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A 370

D 638

E 292

None of these

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

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E

H

B

Z

Alnico is an alloy containing how many percent nickel.

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10%

14%

18%

22%

The following statements are true except one which one.

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Carburizing does not harden a steel

Flame and induction hardening require the use of hard enable steels.

Quench –hardened steel does not require tempering to present brittleness

None of these

Which of the following process is not sorbent separation technolgy.

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Penex

Parex

Molex

Olex

What typical penetrator is used in Brinell hardness test

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10 mm ball

1.6 mm diameter ball

20^o needle

None of these

Washing soap can be prepared by saponification with alkali of _____ of the following oil.

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Rose oil

Paraffin oil

Groundnut oil

Coconut oil

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