Colloidal mills are used for ______________ grinding?
A. Coarse
B. Intermediate
C. Fine
D. Ultrafine
Mechanical Operations
Which of the following represents the plot of filtrate volume versus time for constant pressure filtration ?
Which of the following represents the plot of filtrate volume versus time for constant pressure filtration ?
A. Parabola
B. Straight line
C. Hyperbola
D. Exponential curve
In the cyclone separator used for separation of dust from dust laden gas, the gas ?
In the cyclone separator used for separation of dust from dust laden gas, the gas ?
A. Enters the cyclone from the top
B. Is admitted tangentially at high velocity
C. Develops a helical motion inside the chamber
D. Both B. and C.
The study on washability of coal is done by using the _____________ technique?
The study on washability of coal is done by using the _____________ technique?
A. Tabling
B. Elutriation
C. Heavy media separation
D. None of these
______________ is used for producing a thick suspension from a thin slurry?
______________ is used for producing a thick suspension from a thin slurry?
A. Cartridge filter
B. Rotary drum vacuum filter
C. Pressure filter thickener
D. Plate and frame filter press
The speed of a rotary drum vacuum filter may be about _____________ rpm?
The speed of a rotary drum vacuum filter may be about _____________ rpm?
A. 1
B. 50
C. 100
D. 500
Vibrating screens have capacity in the range of ______________ tons/ft2 .mm mesh size?
Vibrating screens have capacity in the range of ______________ tons/ft2 .mm mesh size?
A. 0.2 to 0.8
B. 5 to 25
C. 50 to 100
D. 100 to 250
_____________ mills are termed as disintegrators?
_____________ mills are termed as disintegrators?
A. Cage
B. Compartment
C. Pebble
D. All tumbling
Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?
Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?
A. Rittinger’s law
B. Kick’s law
C. Bond’s law
D. None of these
The term ‘angle of nip’ is concerned with the operation of the ____________ crushers?
The term ‘angle of nip’ is concerned with the operation of the ____________ crushers?
A. Jaw
B. Roll
C. Gyratory
D. None of these