A. M ∝ √D
B. M ∝ D2
C. M ∝ D3
D. M ∝ D
Related Mcqs:
- Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) ?
A. 0.01 L.S
B. 0.087 L.S
C. L.S
D. L.S/0.087 - As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?
A. LS
B. 93 LS
C. 250 LS
D. √(LS) - Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines ?
A. Compartment mill
B. Rod mill
C. Pebble mill
D. Tube mill - ____________ conveyor is the most suitable for long distance transportation of cold, nonabrasive granular/irregular shape/fine materials?
A. Bucket
B. Belt
C. Screw
D. Apron - Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) ?
A. m/ρ . Vp
B. m . ρ/Vp
C. m . Vp/ρ
D. Vp/m . ρ - The critical speed of a trommel (N) is related to its dia D. as _____________________?
A. N ∝ 1/√D
B. N ∝ √D
C. N ∝ D
D. N ∝ 1/D - The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?
A. Bag filter
B. Electrostatic precipitator
C. Cyclone separator
D. Wet scrubber - 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. 0.014 - What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls ?
A. 0.5
B. 1.0
C. 2.76
D. 0.66 - Solid particles separation based on the difference in their flow velocities through fluids is termed as the__________________?
A. Clarification
B. Classification
C. Elutriation
D. Sedimentation
