Question # 1

Prilling is a process in which

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Concentration of urea is increased

Water is removed from urea

Molten urea is converted to solid drop

Some other ingredients are added to urea

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

The temperature of digester is main tained at

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100^oC

160-180^oC

200^oC

200-240^oC

The nitrogen present to some fertilizers helps plants to

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Fight against diseases

Produce fat

Undergo photosynthesis

Produce protein

Which process of pulp making is mostly used in Pakistan.

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Kraft process

Sulphite process

Neutral sulphite semi chemical process

Wet process

Which one of the following set of raw material is most suitable for manufacture of urea.

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CH4, N2 and CO2

H2, N2 and CO

H2,CO2 and H2O

H2O, N2 and H2

During the manufacturing process of cement the temperature of the decomposition zone goes up to

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600°C

800°C

1000°C

1200°C

The nitrogen present in some fertilizers helps plants

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to fight against diseases

to produce fat

to undergo photosynthesis

to produce protien

Micro-nutrient is required in quantity for plant growth ranging from

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4-40 gm

6-200 gm

6-200 kg

4-40 kg

The percentage of clay and liem stone in cement is in the ratio of.

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1 : 1

1 :2

1:3

3:1

Ammonium Nitrate fertilizer is not useful for

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Wheat

Cotton

Sugan cane

Paddyrice

Conversion of ammonium carbamate into urea is

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Hydrolysis

Hydrogenation

Hydration

Dehydration

During the manufacturing process of cement the temperature of the decomposition zone goes up to.

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600 ^oC

900 ^oC

1000 ^oC

1200 ^oC

Which substance is used ot bleach the pulp.

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Na2SO3

NaCl

NaClO

NaOH

In which country first of all paper was invented

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USA

China

Egypt

Germany

How many zones through which the charge passes in a rotary kiln

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4

3

2

5

Which one is not an argillaceous material.

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Clay

Shale

State

Gypsum

The diameter of rotary kiln in the manufacture of Portland cement is.

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1 to 2 feet

2 to 4 feet

4 to 8 feet

8 to 15 feet

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