Filter medium resistance is important during the ______________ of filtration?
A. Early stages
B. Final stages
C. Entire process
D. None of these
Mechanical Operations
Diatomaceous earth is a/an_________________?
Diatomaceous earth is a/an_________________?
A. Explosive
B. Filter aid
C. Filter medium
D. Catalyst
Sedimentation on commercial scale occurs in____________________?
Sedimentation on commercial scale occurs in____________________?
A. Classifiers
B. Thickeners
C. Rotary drum filters
D. Cyclones
Filter aid is used to____________________?
Filter aid is used to____________________?
A. Increase the rate of filtration
B. Decrease the pressure drop
C. Increase the porosity of the cake
D. Act as a support base for the septum
In a roll crusher, the specific power consumption and the production rate is affected by the_________________?
In a roll crusher, the specific power consumption and the production rate is affected by the_________________?
A. Reduction ratio
B. Differential roll speed
C. Both A. and B.
D. Neither A. nor B.
The value of ‘angle of nip’ is generally about__________________?
The value of ‘angle of nip’ is generally about__________________?
A. 16°
B. 32°
C. 52°
D. 64°
For classification of potable (drinking) water, we use a _______________ filter?
For classification of potable (drinking) water, we use a _______________ filter?
A. Gravity sand
B. Plate and frame
C. Vacuum leaf
D. Rotary vacuum
Trommels employ _____________ for screening of materials?
Trommels employ _____________ for screening of materials?
A. Fibrous cloth
B. Woven wire screen
C. Punched plate
D. None of these
The material is crushed in a gyratory crusher by the action of__________________?
The material is crushed in a gyratory crusher by the action of__________________?
A. Impact
B. Compression
C. Attrition
D. Cutting
Production rate _____________ with increased fineness, with a given energy input to the size reduction machine?
Production rate _____________ with increased fineness, with a given energy input to the size reduction machine?
A. Decreases
B. Increases
C. Remains unchanged
D. May increase or decrease; depends on the machine