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.Management Sciences
Category: Common Chemical Industries
The fertilizers which provide single nutrient from NPK are called ___________ fertilizer?
A. straight
B. compound
C. both a and b
D. none of the above
Which one of the following raw material is not present in the cement ?
A. lime stone
B. gypsum
C. KNO3
D. iron oxide
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
Which of the following fertilizers is not useful for paddy rice ?
A. urea
B. DAP
C. Ammonium sulphate
D. Ammonium nitrate
The fertility of the soil is improved by________________?
A. Rotation of the crops
B. Adding lime to the acid salts
C. Adding manure and growing legumes
D. All
What is clinker ?
A. roasted calcareous material
B. roasted argillaceous material
C. roasted calcareous and argillaceous material
D. roasted gypsum
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)
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
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
Which one of the following set of raw material is most suitable for manufacture of urea ?
A. CH4 N2 and CO2
B. H2 N2 and CO
C. H2 CO2 and H2O
D. H2O N2 and H2
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