Mechanical Operations

General mechanism of size reduction in intermediate and fine grinder is by __________________?

Byadmin February 18, 2019August 22, 2021

General mechanism of size reduction in intermediate and fine grinder is by __________________?

A. Cutting action
B. Compression
C. Compression and tearing
D. Impact and attrition

Mechanical Operations

Cartridge filters are termed as ‘edge’ filters, because of the fact that the_________________?

Cartridge filters are termed as ‘edge’ filters, because of the fact that the_________________?

A. Disks have very sharp edge
B. Solids are not deposited at the edge of the disk
C. Bulk of the solids are removed at the periphery of the disks
D. None of these

Read More Cartridge filters are termed as ‘edge’ filters, because of the fact that the_________________?
Mechanical Operations

Separation of isotopes is generally done using a/an _______________ centrifuge?

Separation of isotopes is generally done using a/an _______________ centrifuge?

A. Ultra
B. Disk-bowl
C. Both A. & B.
D. Neither A. nor B.

Read More Separation of isotopes is generally done using a/an _______________ centrifuge?
Mechanical Operations

In case of a hammer crusher ?

In case of a hammer crusher ?

A. Crushing takes place by impact breaking
B. Maximum acceptable feed size is 30 cms
C. Reduction ratio can be varied by adjusting the distance from cage to hammers
D. All A., B. and C.

Read More In case of a hammer crusher ?
Mechanical Operations

Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?

Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?

A. cos α = (dr + dp)/(dr + df)
B. cos α = (dr + df)/(dr + dp)
C. tan α = (dr + dp)/(dr + df)
D. sin α = (dr + dp)/(dr + df)

Read More Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?
Mechanical Operations

Which of the following minerals is not subjected to magnetic separation method ?

Which of the following minerals is not subjected to magnetic separation method ?

A. Rutile
B. Galena
C. Chromite
D. Siderite

Read More Which of the following minerals is not subjected to magnetic separation method ?
Mechanical Operations

To produce talcum powder, use_____________________?

To produce talcum powder, use_____________________?

A. Ball mill
B. Hammer mill
C. Jet mill
D. mill

Read More To produce talcum powder, use_____________________?

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