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.

The fertilizers which provide single nutrient from NPK are called _______ fertilizer

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Straight

compound

Both A and b

None of above

For quality control of Portland cement, the test essentially done is.

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Setting time

Soundness

Tensile strength

All

What is the colour of pulp obtained from chemical pulping.

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Black

Brown

Blue

Red

Turpentine is obtained from._______________

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Oak tree

Pine tree

Birch tree

Lemon tree

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

To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temeperature between

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1100 ^o and 1200 ^oC

1200 ^o and 1300 ^oC

1400 ^o and 1500 ^oC

1900^o and 2000 ^oC

The term 'brass' is very commonly used to designate any alloy primarily of.

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Copper and zinc

Aluminum and iron

Copper and aluminum

Zinc and nickel

Refining is

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Extracting petroleum gas

Separation of various fraction

Heating of coal

All of above

What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids.

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Alkaline

Alkydes

Alcocide

Ketones

What is a process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface?

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Cyaniding

Nitriding

Flame hardening

Stability

Most commercial glasses consist of

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Lime

Soda

Silica

All

The cooling of molten urea by air in the tower is called.

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Prilling

Evaporation

Condensation

Distillation

The liquor is screened to exclude ________ material

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Fibrous

Polymers

Maltose

Sucrose

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 prefix in steel identification means composition varies from normal limits.

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E

B

X

F

What is clinker.

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gypsum

What element is added to copper to make it extremely hard.

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Aluminum

Zinc

Lead

Tin

The green color of water in a lake is due to

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Excessive growth of sea weeds

Algae

Pollution

Grass

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

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Na2CO3

KCl

Na2SO4

NaOH

Which of the following is not adsorptive separation process.

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Parex

Olex

Penex

None of these

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