Entry Test MCQ :: Common Chemical Industries

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21.

Which one of the following fertilizers provides the nitrogen and phosphorus to the plant?

A.	urea	B.	calcium superphosphate
C.	diammonium phosphate	D.	potassium nitrate

22.

The potassium present in plant help the plant to

A.	form starch sugar and fibrous material	B.	ripen the seeds and fruits
C.	increase the resistance against disease	D.	all the above statements are correct

23.

Cement is a mixture of

A.	clay and clinker	B.	clay lime stone and gypsum
C.	lime stone and gypsum	D.	lime stone and clay

24.

What is clinker?

A.	roasted calcareous material	B.	roasted argillaceous material
C.	roasted calcareous and argillaceous material	D.	roasted gypsum

25.

Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage?

A.	Lime (CaO)	B.	Silica (SiO2)
C.	Alumina (Al2O3)	D.	Magnesia (MgO)

26.

Which one of the following raw material is not present in the cement?

A.	lime stone	B.	gypsum
C.	KNO3	D.	iron oxide

27.

Which sequence of steps is correct for the manufacture of cement?

A.	crushing heating mixing grinding	B.	crushing mixing heating grinding and mixing
C.	crushing grinding mixing heating	D.	mixing heating grinding crushing

28.

The sequence of zones in the rotary kiln are as

A.	dry zone burning zone decomposition zone cooling zone	B.	cooling zone burning zone decomposition zone dry zone
C.	burning zone cooling zone decomposition zone	D.	dry zone decomposition zone burning zone cooling zone

29.

The composition of mixture of clay and lime stone in the raw for cement material is

A.	75% lime stone and 25% clay	B.	25% lime stone and 75% clay
C.	15% lime stone and 55% clay	D.	55% lime stone and 15% clay

30.

The important function of burning zone in the rotary kilm is

A.	to dry the moisture of slurry	B.	to decompose lime stone to unslaked lime
C.	combination of different oxides like CaO SiO2 Fe2O3 and Al2O3	D.	to reduce the impurities