Question # 1

What is use of the addition of brine solution in the production of soap from castor oil and sodium hydroxide.

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To speed up the reaction

To lower the solubility of soap

To remove unreacted castor oil and sodium hydroxide

To increase the purity of the soap obtained.

__________ is used for fruits, vegetables and tobacco

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Potassium Chloride

Potassium Sulphate

Potassium nitraite

All above

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

What is the purpose of molybdenum in steel alloying.

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To increase dynamic and high temperature strength and hardness

To increase brittleness

To increase corrosion and resistance

All above

What is a measure of rigidity?

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Stiffiness

Jardmess

Strength

Modulus of elasticity

Cement containing higher percentage of gypsum than required.

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Sets slowly

Sets repidly

_{Does not set at all}

Has no effect

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 is the advantage of quench hardening?

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Imporoved strength

Hardness

Wear characteristics

All of the choice

Which of the following is not adsorptive separation process.

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Parex

Olex

Penex

None of these

What is clinker.

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gypsum

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

in the system of designating wrought aluminum alloys the letter F that follows the number indicates what condition of the alloy.

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As fabricated

Calcined

Annealed

Strain hardened

What impurity in steel can cause ted shortness which means the steel becomes unworkable at high temperature.

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Sulphur

Silicon

Magnesium

Aluminium

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

What is called black gold.

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Petroleum

Coal

Coal tar

Natural gas

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

Glass was first made by about________

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40 BC

400 BC

4000 BC

100 BC

What group of steels are molybdenum high sped steels.

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Group A

Group D

Group M

Group H

The juice is allowed to boil at lower temperatures to protect the sugar from

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Hardening

Solubility in water

Caramelization

Dwatering

In Glass of vitreous state solid the atoms are arranged in.

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Regular fashion

Random fashion

linear fashion

All of these

Which cast iron is hard and wear resistant.

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Grey iron

White iron

Melleable iron

None of these

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