In bag filters, filter fabrics are never made of__________________?
A. Metallic wire woven mesh
B. Polyester fibres
C. Cotton fibres
D. Nylon fibres
Month: February 2019
For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?
For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?
A. The new surface created
B. The size reduction ratio
C. The change in volume due to crushing
D. None of these
Which of the following screens has the maximum capacity ?
Which of the following screens has the maximum capacity ?
A. Grizzlies
B. Trommels
C. Shaking screen
D. Vibrating screen
For spheres, volume shape factor is given by____________________?
For spheres, volume shape factor is given by____________________?
A. π = (A/D2)
B. 2π = (2A/D2)
C. π/6 = (V/D3)
D. AD/V
The inlet pressure in a constant rate filtration____________________?
The inlet pressure in a constant rate filtration____________________?
A. Increases continuously
B. Decreases gradually
C. Remains constant
D. None of these
Trommels separate a mixture of particles depending on their_____________________?
Trommels separate a mixture of particles depending on their_____________________?
A. Size
B. Density
C. Wettability
D. Electrical & magnetic properties
Close circuit grinding by a ball mill with air sweeping employs a _______________________?
Close circuit grinding by a ball mill with air sweeg employs a _______________________?
A. Classifier
B. Cyclone separator between mill & classifier
C. Both A. & B.
D. Neither A. nor B.
Which of the following mechanical conveyors does not come under the division „scrapers‟ ?
Which of the following mechanical conveyors does not come under the division „scrapers‟ ?
A. Ribbon conveyor
B. Flight conveyor
C. Bucket elevators
D. Drag conveyor
Which of the following is the softest material ?
Which of the following is the softest material ?
A. Talc
B. Feldspar
C. Corundum
D. Calcite
All resistances during washing of cake _____________________?
All resistances during washing of cake _____________________?
A. Increases
B. Decreases
C. Remain constant
D. None of these