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Chemical Engineering - Mechanical Operations

Exercise : Mechanical Operations - Section 2
36.
The controlling resistance in a rotary drum vacuum filter is the __________ resistance.
piping
cake
filter medium
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Which of the following is used for primary crushing of very hard lumpy materials ?
Toothed roll crusher
Gyratory crusher
Ball mill
Tube mill
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Coal is finally pulverised to 200 mesh size for burning in boilers by a
hammer crusher
ball mill
roll crusher
gyratory crusher
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Crushing efficiency is the ratio of the
surface energy created by crushing to the energy absorbed by the solid.
energy absorbed by the solid to that fed to the machine.
energy fed to the machine to the surface energy created by crushing.
energy absorbed by the solid to the surface energy created by crushing.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size )
c/s
s/c
s . c
1/s . c
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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