A. 0.007
B. 0.30
C. 50
D. 0.014
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 - 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 - 200 mesh screen means 200 openings per_____________________?
A. cm2
B. cm
C. inch
D. inch2 - A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is_________________?
A. 0.50
B. 0.58
C. 0.68
D. 0.62 - 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 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 - 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 ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is_______________?
A. 2
B. √2
C. 1.5
D. √3 - 200 mesh sieve size corresponds to _____________ microns?
A. 24
B. 74
C. 154
D. 200
