Mechanical Operations - Section 1 (3)

Directions to Solve

Mechanical Operations - Section 1

You can find the problems related to mechanical operation and can
solve these problems to test your aptitude ability.

17.

Gravity settling process is not involved in the working of a

A.	hydrocyclone
B.	classifier
C.	dorr-thickener
D.	sedimentation tank

Answer: Option A

Explanation:

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18.

Pick out the wrong statement.

A.	Close circuit grinding is more economical than open circuit grinding.
B.	Cod oil, beef tallow or aluminium stearates are used as grinding aids in cement 'industries'.
C.	The equipment used for the removal of traces of solids from a liquid is called a classifier.
D.	Size enlargement is a mechanical operation exemplified by medicinal tablet making.

Answer: Option C

Explanation:

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19.

The capacity of a pneumatic conveying system depends upon the

A.	bulk density of materials.
B.	pressure of the conveying air.
C.	diameter of the conveying line.
D.	all (a), (b) and (c).

Answer: Option D

Explanation:

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20.

Which of the following mineral dressing operations is termed as 'comminution'?

A.	Panning
B.	Spiralling
C.	Tabling
D.	None of these

Answer: Option D

Explanation:

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21.

Filter aid is used to

A.	increase the rate of filtration.
B.	decrease the pressure drop.
C.	increase the porosity of the cake.
D.	act as a support base for the septum.

Answer: Option C

Explanation:

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22.

If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the

A.	sedimentation
B.	flocculation
C.	dispersion
D.	centrifugation

Answer: Option D

Explanation:

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23.

Which of the following is not a part of the Blake jaw crusher?

A.	Hanger
B.	Check plates
C.	Toggles
D.	Pitman

Answer: Option A

Explanation:

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24.

The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

A.	speed
B.	thickness
C.	length
D.	none of these

Answer: Option A

Explanation:

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