Chemical Engineering MCQs

6108 MCQs  (Page 252 of 611)

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A widely used size reduction equipment for ______________ is Bradford breaker?
A. Talc
B. Coal
C. Iron core
D. Wheat
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Fluid medium used in the classification technique of mineral beneficiation is_________________?
A. Air
B. Water
C. Either a. or b.
D. Neither a. nor b.
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Which of the following is not a non-metalliferous mineral ?
A. Calcite
B. Fluorspar
C. Quartz
D. Cassiterite
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Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill.) ?
A. D
B. 1/d
C. D2.5
D. 1/d2.5
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Helical screw agitator is used for________________?
A. Mixing highly viscous pastes
B. Blending immiscible liquids
C. Mixing liquids at very high temperature (> 250 °c)
D. None of these
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Balls for ball mills are never made of_________________?
A. Forged/cast steel
B. Lead
C. Cast iron
D. Alloy steel
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In froth floatation, chemical agent added to cause air adherence is called___________________?
A. Collector
B. Frother
C. Modifier
D. Activator
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In a roll crusher, both the rolls_________________?
A. Have the same diameter
B. Are rotated towards each other
C. Run either at the same or different speeds
D. All a., b. and c.
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In a mixer, the quantity, (v. L/D) is termed as __________ number (where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing) ?
A. Weber
B. Peclet
C. Brinkman
D. Schmidt
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A pebble mill_________________?
A. Is a ball mill
B. Employs flints or ceramic pebbles as the grinding medium
C. Is a tube mill lined with ceramic or other non-metallic liner
D. Both b. and c.
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Word of the Day
28 Jul
Fragile
(of an object) easily broken or damaged.
نازک، کاغذی، آسانی سے ٹوٹ جانیوالا

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