Mechanical Operations

Wet sieving is employed, when the product contains ________________ materials?

Byadmin February 18, 2019August 23, 2021

Wet sieving is employed, when the product contains ________________ materials?

A. Abrasive
B. Large quantity of very fine
C. Coarse
D. Non-sticky

Mechanical Operations

Velocity of a small particle of diameter ‘Dp’ at a distance ‘r’ from the rotational axis of a cyclone rotating at an angular speed ‘ω’ is given by (the other symbols are as per standard notation) ?

Velocity of a small particle of diameter ‘Dp’ at a distance ‘r’ from the rotational axis of a cyclone rotating at an angular speed ‘ω’ is given by (the other symbols are as per standard notation) ?

A. [(DP/18). (ρs – ρ/μ)] ω2r
B. [(DP2/18). (ρs – ρ/μ)] ω2r
C. [(DP/18). (ρs – ρ/μ)] ω2r2
D. [(DP2/18). (ρs – ρ/μ)] ω2r

Read More Velocity of a small particle of diameter ‘Dp’ at a distance ‘r’ from the rotational axis of a cyclone rotating at an angular speed ‘ω’ is given by (the other symbols are as per standard notation) ?
Mechanical Operations

Which of the following is not used as a surface active agent in a flocculation operation ?

Which of the following is not used as a surface active agent in a flocculation operation ?

A. Sodium silicate
B. Quartz
C. Lime
D. Alumina

Read More Which of the following is not used as a surface active agent in a flocculation operation ?
Mechanical Operations

Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the ___________________?

Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the ___________________?

A. Light metal powder down upto 4 mesh size
B. Dry chemicals
C. Heavy tonnages of rocks or gravel
D. Powdered food & granular materials

Read More Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the ___________________?
Mechanical Operations

Mesh indicates the number of holes per_________________?

Mesh indicates the number of holes per_________________?

A. Square inch
B. Linear inch
C. Square foot
D. Linear foot

Read More Mesh indicates the number of holes per_________________?
Mechanical Operations

The capacity of a gyratory crusher is ______________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?

The capacity of a gyratory crusher is ______________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?

A. Same as
B. 2.5 times
C. 5 times
D. 10 times

Read More The capacity of a gyratory crusher is ______________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?
Mechanical Operations

Gold ore concentration is mostly done using___________________?

Gold ore concentration is mostly done using___________________?

A. Jigging
B. Tabling
C. Froth floatation
D. Elutriation

Read More Gold ore concentration is mostly done using___________________?

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