Mechanical Operations MCQs

Question 1

Size reduction of __________ is accomplished in steam heated rollers and roll crushers.

Accepted Answer

Hard rubber

Answer

Resins

Answer

Gums

Answer

Waxes

Question 2

Filtration rate does not depend upon the

Accepted Answer

None of these

Answer

Pressure drop & area of filtering surface

Answer

Resistance of the cake & the septum

Answer

Properties of the cake & the filtrate

Question 3

To produce talcum powder, use

Accepted Answer

Ball mill

Answer

Hammer mill

Answer

Jet mill

Answer

Pin mill

Question 4

Separation of isotopes is generally done using a/an __________ centrifuge.

Accepted Answer

Ultra

Answer

Disk-bowl

Answer

Both A & B

Answer

Neither A nor B

Question 5

Gravity stamp mill is meant for the __________ crushing.

Accepted Answer

Fine

Answer

Primary

Answer

Intermediate

Answer

Ultrafine

Question 6

Pick out the wrong statement.

Accepted Answer

Cake resistance is independent of the pressure drop

Answer

For the compressible cake, voidage & the specific resistance of the cake can be assumed to be constant

Answer

Crushing of explosive materials are done by employing drygrinding

Answer

Gyratory crusher is a coarse crusher

Question 7

Which of the following is not an ultrafine grinder (colloid mill)?

Accepted Answer

Toothed roll crusher

Answer

Micronizers

Answer

Agitated mills and fluid energy mills

Answer

Hammer mills with internal classification

Question 8

The capacity of a pneumatic conveying system depends upon the

Accepted Answer

All of the above

Answer

Bulk density of materials

Answer

Pressure of the conveying air

Answer

Diameter of the conveying line

Question 9

Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an

Accepted Answer

Air filter

Answer

Bag filter

Answer

Venturi scrubber

Answer

Hydrocyclones