Mechanical Operations

Gold ore concentration is mostly done using___________________?

Byadmin February 18, 2019August 22, 2021

Gold ore concentration is mostly done using___________________?

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

Mechanical Operations

_______________ mixer is used for devulcanisation of rubber scrap & making water dispersion & rubber solution?

_______________ mixer is used for devulcanisation of rubber scrap & making water dispersion & rubber solution?

A. Tumbler
B. Banbury
C. Muller
D. Ribbon blender

Read More _______________ mixer is used for devulcanisation of rubber scrap & making water dispersion & rubber solution?
Mechanical Operations

Toothed roll crushers achieve size reduction by___________________?

Toothed roll crushers achieve size reduction by___________________?

A. Tearing (shear) and compression
B. Impact and attrition
C. Both A. & B.
D. Neither A. nor B.

Read More Toothed roll crushers achieve size reduction by___________________?
Mechanical Operations

The controlling resistance in a rotary drum vacuum filter is the ________________ resistance?

The controlling resistance in a rotary drum vacuum filter is the ________________ resistance?

A. Pig
B. Cake
C. Filter medium
D. None of these

Read More The controlling resistance in a rotary drum vacuum filter is the ________________ resistance?
Mechanical Operations

As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?

As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?

A. LS
B. 93 LS
C. 250 LS
D. √(LS)

Read More As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?
Mechanical Operations

Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) ?

Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) ?

A. 3.6 V.W.Dr.ρ
B. 3.6 V.W. ρ
C. 3.6 W.Dr.ρ
D. 3.6 V.W.Dr/ρ

Read More Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) ?
Mechanical Operations

Dust laden air can be purified using a____________________?

Dust laden air can be purified using a____________________?

A. Cyclone separator
B. Bag filter
C. Gravity settler
D. Tubular centrifuge

Read More Dust laden air can be purified using a____________________?

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