Mechanical Operations

The main size reduction operation in ultrafine grinders is_____________?

Byadmin February 18, 2019August 22, 2021

The main size reduction operation in ultrafine grinders is_____________?

A. Cutting
B. Attrition
C. Compression
D. Impact

Mechanical Operations

Which of the following is not used as filter aid ?

Which of the following is not used as filter aid ?

A. Asbestos
B. Diatomaceous earth
C. Purified wood cellulose
D. Rice husk

Read More Which of the following is not used as filter aid ?
Mechanical Operations

Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?

Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?

A. 1.0
B. 0.5
C. 1.34
D. 4.34

Read More Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?
Mechanical Operations

Which is a secondary crusher for a hard & tough stone ?

Which is a secondary crusher for a hard & tough stone ?

A. Jaw crusher
B. Cone crusher
C. Impact crusher
D. Toothed roll crusher

Read More Which is a secondary crusher for a hard & tough stone ?
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

Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?

Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?

A. √μ
B. 1/√μ
C. 1/μ
D. 1/μ2

Read More Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ____________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?
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?

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