Related Questions

Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.
A Filtering
B Washing
C Drying
D All of the above
Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
A 1 to 5
B 30 to 80
C 250 to 350
D 450 to 500
The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.
A 1.2
B 12
C 120
D 700
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
A 5-10
B 30-80
C 150-250
D 350-400
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
The controlling resistance in a rotary drum vacuum filter is the __________ resistance.
A Piping
B Cake
C Filter medium
D None of these
The speed of a rotary drum vacuum filter may be about __________ rpm.
A 1
B 50
C 100
D 500
Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.
A 0.1 to 2
B 5 to 7
C 3 to 8
D 8 to 15
Filtration capacity of a rotary drum vacuum filter depends upon the
A Cake thickness
B Characteristics of the feed slurry
C Both A & B
D Neither A nor B
Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.
A 1
B 0.1
C 0.01
D 0.001

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