Chemical Engineering MCQs

6108 MCQs  (Page 224 of 611)

Attempt Chemical Engineering Quiz
In screen analysis, the notation +5 mm/-10 mm means particles passing through ____________________?
A. 10 mm screen and retained on 5 mm screen
B. 5 mm screen and retained on 10 mm screen
C. Both 5 mm and 10 mm screens
D. Neither 5 mm nor 10 mm screen
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Cement clinker is reduced to fine size by a _____________________?
A. Roll crusher
B. Ball mill
C. Tube mill
D. Hammer mill
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Grinding efficiency of a ball mill is of the order of _______________ percent?
A. 1-5
B. 40-50
C. 75-80
D. 90-95
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Separation of isotopes is generally done using a/an _______________ centrifuge?
A. Ultra
B. Disk-bowl
C. Both a. & b.
D. Neither a. nor b.
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Toothed roll crushers achieve size reduction by___________________?
A. Tearing (shear) and compression
B. Impact and attrition
C. Both a. & b.
D. Neither a. nor b.
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Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are________________?
A. Carbonates
B. Sulphates
C. Silicates & phosphates
D. Bi-carbonates
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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
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Mixing mechanism employed in a pan mixer is by ________________?
A. Mulling
B. Kneading
C. Dispersion
D. None of these
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Length/diameter ratio of a ball mill is __________________ ?
A. 1.5
B. 1
C. < 1
D. > 1
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Shell and leaf filter as compared to plate and frame filter _____________________?
A. Entails less labor cost
B. Facilitates filtration under higher pressure
C. Provides more effective washing
D. All a., b. & c.
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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