The study on washability of coal is done by using the _____________ technique?
A. Tabling
B. Elutriation
C. Heavy media separation
D. None of these
Month: February 2019
______________ 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
Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation ?
Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation ?
A. Check plates
B. Jaw plates
C. Toggles
D. Crush shaft
The capacity of a pneumatic conveying system depends upon the ______________________?
The capacity of a pneumatic conveying system depends upon the ______________________?
A. Bulk density of materials
B. Pressure of the conveying air
C. Diameter of the conveying line
D. All A., B. and C.
Where the annual summit of the African Union held on 9-10 February?
Where the annual summit of the African Union held on 9-10 February?A. Kigali, Rwanda
B. Addis Ababa,Ethiopia
C. Abuja, Nigeria
D. Accra, Ghana
B. Addis Ababa,Ethiopia
C. Abuja, Nigeria
D. Accra, Ghana