Fluid energy mill comes in the category of________________?
Fluid energy mill comes in the category of________________?
A. Grinder
B. Crusher
C. Cutter
D. Ultrafine grinder
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Solid particles separation based on the difference in their flow velocities through fluids is termed as the__________________?
Solid particles separation based on the difference in their flow velocities through fluids is termed as the__________________?A. Clarification
B. Classification
C. Elutriation
D. SedimentationWhich of the following is the hardest material ?
Which of the following is the hardest material ?A. Calcite
B. Quartz
C. Corundum
D. GypsumPulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of ____________ mm?
Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of ____________ mm?A. 0.007
B. 0.30
C. 50
D. 0.014A cottrell precipitator makes use of the ______________ for dusty air cleaning?
A cottrell precipitator makes use of the ______________ for dusty air cleaning?A. Electric spark
B. Corona discharge
C. Alternating current
D. None of theseChance process is used for the________________?
Chance process is used for the________________?A. Cleaning of coal
B. Concentration of iron ore
C. Concentration of pyrites
D. Water treatmentAgglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are________________?
Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are________________?A. Carbonates
B. Sulphates
C. Silicates & phosphates
D. Bi-carbonates