Related Questions

Substances which have permeability less than the permeability of free space are known as
A Ferromagnetic
B Paramagnetic
C Diamagnetic
D Bipolar
The ratio of the actual vacuum to the ideal vacuum in a condenser is called
A Condenser efficiency
B Vacuum efficiency
C Nozzle efficiency
D Boiler efficiency
In most of the vacuum crystalliser, vacuum is generally produced by means of a
A Suction pump
B Compressed air jet
C Steam jet ejector with a barometric condenser
D None of these
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
Superconducting metal in super conducting state has relative permeability of
A Zero
B One
C Negative
D More than one
The relative permeability of a ferromagnetic material is
A Less than one
B More than one
C More than 10
D More than 100 or 1000
The relative permeability of materials is not constant.
A diamagnetic
B paramagnetic
C ferromagnetic
D insulating

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