Optimum ratio of operating speed to critical speed of a trommel is

The process opposite to 'dispersion' is termed as the

The reduction ratio for grinders is defined as(where, D_f and D_p are average diameters of feed and product respectively).

Tube mill compared to ball mill

Dry powdery solid materials are transported by a __________ conveyor.

Ultrafine grinders operate principally by

Separation of solid particles based on their densities is called

Which of the following is a continuous filter?

During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

Which one is a filter aid ?

To remove dirt from the flowing fluid, we use a

In a size reduction crushing operation, feed size istomm while the product size istomm. This is a case of the __________ crushing.

Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an

Wheat is ground into flour in a

Traces of liquid tar fog present in coke oven gas is separated using

The filter medium resistance is controlled by

To produce talcum powder, use

Energy requirement (per unit mass of material crushed/ground) is highest for

The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.

Grinding efficiency of a ball mill is of the order of __________ percent.

Pick out the wrong statement pertaining to the turbine agitator.

For the preliminary breaking of hard rock, we use a

Fluid energy mill comes in the category of

Filtration capacity of a rotary drum vacuum filter depends upon the

Which of the following comes in the category of primary crusher for hard and tough stone ?

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?

In screen analysis, the notation +5 mm/-mm means particles passing through

Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher ?

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

Which of the following is a coarse crusher?

Gravity stamp mill is meant for the __________ crushing.

Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the

Close circuit grinding by a ball mill with air sweeping employs a

The unit of filter medium resistance is

Angle of nip of the crushing rolls does not depend upon the

The energy consumed by a ball mill depends on

The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be __________ cms.

A fluid energy mill is used for

Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.

Crushing efficiency of a machine ranges between __________ percent.

__________ are mixed using ribbon blenders.

During agitation of liquids, the

The process by which fine solids is removed from liquids is termed as

Sizing of very fine particles of the order of 5 tomicrons is done by elutriation, which is a __________ operation.

__________ mills fall in the category of tumbling mills,

Cartridge filters are termed as 'edge' filters, because of the fact that the

Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their

Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called

For classification of potable (drinking) water, we use a __________ filter.

Cake resistance is