In case of a plate and frame filter press, filtrate flow through the cake follows _______________ flow?
A. Plug
B. Turbulent
C. Laminar
D. None of these
Mechanical Operations
A _____________ mixer resembles a ball mill without balls?
A _____________ mixer resembles a ball mill without balls?
A. Banbury
B. Pug mill
C. Tumbling
D. Pan
Which of the following is a coarse crusher ?
Which of the following is a coarse crusher ?
A. Smooth roll crusher
B. Toothed roll crusher
C. Gyratory crusher
D. Tube mill
The reduction ratio for fine grinders is_____________?
The reduction ratio for fine grinders is_____________?
A. 5-10
B. 10-20
C. 20-40
D. As high as 100
Filtration should be stopped in a filter press, if the_________________?
Filtration should be stopped in a filter press, if the_________________?
A. Cake becomes very dense
B. Liquor stops flowing out to the discharge
C. Filtration pressure rises suddenly
D. Both B. & C.
Xanthates are used in the froth floatation process as a/an _______________________?
Xanthates are used in the froth floatation process as a/an _______________________?
A. Conditioner
B. Frother
C. Collector
D. Activator
The operating speed of a ball mill should be ______________ the critical speed?
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
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