The operating speed of a ball mill should be ______________ the critical speed?
A. Less than
B. Much more than
C. At least equal to
D. Slightly more than
Month: February 2019
Filtration rate does not depend upon the________________?
Filtration rate does not depend upon the________________?
A. Pressure drop & area of filtering surface
B. Resistance of the cake & the septum
C. Properties of the cake & the filtrate
D. None of these
Shape factor for a cylinder whose length equals its diameter is_________________?
Shape factor for a cylinder whose length equals its diameter is_________________?
A. 1.5
B. 0.5
C. 1.0
D. 2.0
Which of the following is a batch sedimentation equipment ?
Which of the following is a batch sedimentation equipment ?
A. Dust catcher
B. Filter thickener
C. Dry cyclone separator
D. Rotary sprayer scrubber
Cyclones are used primarily for separating_________________?
Cyclones are used primarily for separating_________________?
A. Solids
B. Solids from fluids
C. Liquids
D. Solids from solids
Traces of liquid tar fog present in coke oven gas is separated using____________________?
Traces of liquid tar fog present in coke oven gas is separated using____________________?
A. Electrostatic precipitator
B. Cyclone separator
C. Strainer
D. None of these
Separation of solid particles based on their densities is called_________________?
Separation of solid particles based on their densities is called_________________?
A. Sizing
B. Sorting
C. Clarification
D. Dispersion
Dust laden air can be purified using a____________________?
Dust laden air can be purified using a____________________?
A. Cyclone separator
B. Bag filter
C. Gravity settler
D. Tubular centrifuge
For the transportation of ultrafine particles, the equipment used is a ____________ conveyor?
For the transportation of ultrafine particles, the equipment used is a ____________ conveyor?
A. Belt
B. Pneumatic
C. Screw
D. None of these
Coal is finally pulverised to 200 mesh size for burning in boilers by a___________________?
Coal is finally pulverised to 200 mesh size for burning in boilers by a___________________?
A. Hammer crusher
B. Ball mill
C. Roll crusher
D. Gyratory crusher