Width and speed of a conveyor belt depends upon the __________ of the material.

Toothed roll crushers achieve size reduction by

Pick out the wrong statement:

A __________ mixer resembles a ball mill without balls.

Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size thatof 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.

During size reduction by a jaw crusher, the energy consumed decreases with the

Paddle agitator

Pick out the wrong statement.

Energy consumption in a crusher decreases with increase in the

Which of the following may prove unsuitable for filtering volatile liquids ?

For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to

Which of the following crushing laws is most accurately applicable to the fine grinding of materials ?

Shell and leaf filter as compared to plate and frame filter

In the cyclone separator used for separation of dust from dust laden gas, the gas

Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m³)

Which of the following is not a cutting machine?

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

Vibrating screens have capacity in the range of __________ tons/ft² .mm mesh size.

Cumulative analysis for determining surface is more precise than differential analysis, because of the

The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)

Hot, lumpy & abrasive materials are best transported by using a/an __________ conveyor.

In paint industries, blending of light paste is done by using a

Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of amesh screen will be smaller than that ofmesh screen. This is valid for

__________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc.

Cyclones are used primarily for separating

Choke crushing (in case of a Jaw crusher) compared to free crushing

Which of the following can be most effectively used for clarification of lube oil and printing ink?

Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.

In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing).

Mass flow of granular solid (M) through a circular opening of dia, D follows

Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the

Weber number is significant and is concerned with the

Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid.

To remove very small amount of tiny solid impurities from liquid, we use a

The reduction ratio for fine grinders is

In bag filters, filter fabrics are never made of

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

In a ball mill, the volume occupied by the balls (when the mill is stopped) is about __________ percent of the volume of the mill.

Additives used for promoting the floccula-tion of particles is a/an

A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.0.and 0.respectively. The screen effectiveness based on the oversize is

Pick out the wrong statement.

As the product becomes finer, the energy required for grinding

There is practically no alternative/competitor to __________ in the beneficiation treatment of sulphide ores.

The specific surface of sherical particles is proportional to (where, D_p = diameter of particle).

Ultracentrifuges running at speeds uptorpm is normally used for the

The term 'angle of nip' is concerned with the operation of the __________ crushers.

Sauter mean diameter is the same as the __________ mean diameter.

A fluid energy mill is used for

The material is crushed in a gyratory crusher by the action of

Screw conveyors are