A. Is suitable for mixing low viscosity liquids
B. Produces axial flow
C. Moves at very high speed
D. None of these
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Related Mcqs:
- Which of the following agitators having a large blade area, rotating at slow speed is used for mixing high viscosity liquids (> 50000 centipoise) ?
A. Propeller
B. Helical screw
C. Flat blade turbine
D. Curved blade turbine - In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?
A. Primary
B. Secondary
C. Fine
D. Ultrafine - For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?
A. d
B. √d
C. d2
D. 1/d - Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a _______________ surface?
A. Plane
B. Curved
C. Ribbed
D. Either A. or B. - Optimum ratio of operating speed to critical speed of a trommel is_____________________?
A. 0.33-0.45
B. 1.33-1.45
C. 0.5-2
D. 1.5-2.5 - Size reduction of asbestos and mica is done by____________________?
A. Hammer mills
B. Rod mills
C. Gyratory crushers
D. Crushing rolls - A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is_____________?
A. 0.1
B. 0.4
C. 0.6
D. None of these - 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 - Vibrating screens have capacity in the range of ______________ tons/ft2 .mm mesh size?
A. 0.2 to 0.8
B. 5 to 25
C. 50 to 100
D. 100 to 250 - In closed circuit grinding as compared to open circuit grinding, the_________________?
A. Specific surface of product is more
B. Product has lesser size uniformity
C. Production rate at a given limiting size is lower
D. Operation is economical
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