A. 24
B. 74
C. 154
D. 200
Related Mcqs:
- Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for__________________?
A. British standard screens
B. German standard screens (DIN 1171) etc
C. American standard screens (ASTM and Tyler standard screens)
D. All A., B. and C. - For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately _____________ microns?
A. 5
B. 50
C. 500
D. 5000 - 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 - 200 mesh screen means 200 openings per_____________________?
A. cm2
B. cm
C. inch
D. inch2 - The opening of a 200 mesh screen (Taylor series) is__________________?
A. 0.0074 cm
B. 0.0074 mm
C. 0.0047 cm
D. 74 milli-microns - The most suitable equipment for the transportation of 200 mesh size particles is a _______________?
A. Bucket elevator
B. Pneumatic conveyor
C. Screw conveyor
D. Belt conveyor - 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 - 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 - Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a _____________ operation?
A. Clarification
B. Sedimentation
C. Flocculation
D. Classification - Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?
A. < 5
B. 10 to 25
C. < 74
D. > 1000
