The nutrients which are required in very small amount for the normal growth of plants are called_________________?

A. Nitrogenous fertilizers
B. Micronutrients
C. Phosphorus fertilizer
D. All of the above

Which one of the following is an inorganic fertilizer ?

A. Manure
B. Urea
C. Ammonium nitrate
D. All

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

What is clinker ?

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

Phosphorus helps in the growth of_________________?

A. Root
B. Leave
C. Stem
D. Seed

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

A. Lime stone
B. Gypsum
C. Kno3
D. Iron oxide

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)

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

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

The important function of burning zone in the rotary kilm is __________________?

A. To dry the mositure 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