Mechanical Operations - Part 1 Online Exam Quiz

Mechanical Operations - Part 1 GK Quiz. Question and Answers related to Mechanical Operations - Part 1. MCQ (Multiple Choice Questions with answers about Mechanical Operations - Part 1

Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a __________ conveyor.

Options

A : flight

B : slat or drag

C : ribbon

D : screw

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Equivalent diameter of a particle is the diameter of the sphere having the same

Options

A : ratio of surface to volume as the actual volume.

B : ratio of volume to surface as the particle.

C : volume as the particle.

D : none of these.

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If dp is the equivalent diameter of a non-spherical particle, V p its volume and sp its surface area, then its sphericity is ? s is defined by

Options

A : ? s = 6 V p /d p s p

B : ? s = V p /d p s p

C : ? s = 6 d p S p /V p

D : ? s = d p S p /V p

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Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill )

Options

A : D

B : 1/ D

C : D 2.5

D : 1/ D 2.5

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Pick out the wrong statement.

Options

A : Recycled coarse material to the grinder by a classifier is termed as circulating load.

B : Wear and tear in wet crushing is more than that in dry crushing of materials.

C : Size enlargement (opposite of size reduction) is not a mechanical operation.

D : A 'dust catcher' is simply an enlargement in a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas.

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In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the

Options

A : square root of the velocity.

B : square of the viscosity.

C : filtration time only.

D : washing time only.

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For sizing of fine materials, the most suitable equipment is a

Options

A : trommel

B : grizzly

C : shaking screen

D : vibrating screen

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Which of the following is not categorised as a "mechanical operation" ?

Options

A : Agitation

B : Filtration

C : Size enlargement

D : Humidification

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Which of the following is a pressure filter ?

Options

A : Leaf filter (Moore filter).

B : Plate and flame filter.

C : Rotary drum filter.

D : Sand filter.

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Tabular bowl centrifuges as compared to disk bowl centrifuges

Options

A : operate at higher speed.

B : employ bowl of larger diameter.

C : can not be operated under pressure/vacuum.

D : can't be used for separation of fine suspended solids from a liquid.

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