The specific surface of spherical particles is proportional to (where, Dp = diameter of particle)?
A. D2
B. Dp
C. 1/Dp
D. 1/D2p
Month: February 2019
Which of the following agitators having a large blade area, rotating at slow speed is used for mixing high viscosity liquids (> 50000 centipoise) ?
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
Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?
Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?
A. √μ
B. 1/√μ
C. 1/μ
D. 1/μ2
Flow of filtrate through the cake in a plate and frame filter press is best described by the ______________ equation?
Flow of filtrate through the cake in a plate and frame filter press is best described by the ______________ equation?
A. Kozeny-Carman
B. Hagen-Poiseuille’s
C. Fanning’s
D. Kremser
Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines ?
Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines ?
A. Compartment mill
B. Rod mill
C. Pebble mill
D. Tube mill
Angle of nip of the crushing rolls does not depend upon the_______________?
Angle of nip of the crushing rolls does not depend upon the_______________?
A. Diameter of the rolls
B. Speed of the rolls
C. Product size
D. Feed size
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) ?
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) ?
A. 0.5 D
B. D
C. 1.5 D
D. 2 D
Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?
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
Which of the following mechanical conveyors does not come under the division „carriers‟ ?
Which of the following mechanical conveyors does not come under the division „carriers‟ ?
A. Belt conveyor
B. Bucket elevator
C. Screw conveyor
D. Apron conveyor
Which of the following is not used as filter aid ?
Which of the following is not used as filter aid ?
A. Asbestos
B. Diatomaceous earth
C. Purified wood cellulose
D. Rice husk