Mechanical Operations

Coal is finally pulverised to 200 mesh size for burning in boilers by a___________________?

Byadmin February 18, 2019August 23, 2021

Coal is finally pulverised to 200 mesh size for burning in boilers by a___________________?

A. Hammer crusher
B. Ball mill
C. Roll crusher
D. Gyratory crusher

Mechanical Operations

The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?

The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?

A. c/s
B. s/c
C. s . c
D. 1/s . c

Read More The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?
Mechanical Operations

Sphericity of raschig ring (whose length and diameter are equal) is___________________?

Sphericity of raschig ring (whose length and diameter are equal) is___________________?

A. > 1
B. < 1
C. 1
D. 2

Read More Sphericity of raschig ring (whose length and diameter are equal) is___________________?
Mechanical Operations

_______________ mill is normally used for grinding of talc?

_______________ mill is normally used for grinding of talc?

A. Tube
B. Compartment
C. Ring-roll
D. Pebble

Read More _______________ mill is normally used for grinding of talc?
Mechanical Operations

______________ is used for producing a thick suspension from a thin slurry?

______________ is used for producing a thick suspension from a thin slurry?

A. Cartridge filter
B. Rotary drum vacuum filter
C. Pressure filter thickener
D. Plate and frame filter press

Read More ______________ is used for producing a thick suspension from a thin slurry?
Mechanical Operations

As particle size is reduced__________________?

As particle size is reduced__________________?

A. Screening becomes progressively more difficult
B. Screening becomes progressively easier
C. Capacity and effectiveness of the screen is increased
D. None of these

Read More As particle size is reduced__________________?
Mechanical Operations

Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?

Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?

A. Cresylic acid
B. Copper sulphate
C. Calcium carbonate
D. Sodium carbonate

Read More Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?

Similar Posts