Which of the following is not an industrial screening equipment ?

Which of the following is not a wet classifier ?

Which of the following is not used as a filter medium in case of corrosive liquids ?

The sphericity of a solid particle of cubical shape is

Vertical transportation of materials can be done by a/an

Which of the following must be stored in silos and not in open yard ?

Fluid medium used in the classification technique of mineral beneficiation is

The maximum slope of a belt conveyor can be

Which of the following conveyors cannot be recommended for transportation of abrasive materials ?

Separation of materials into products based on the difference of their sizes is called

A(by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.μm/s. If the Richardson Zaki hindered settling index is 4.then the terminal velocity of a sand grain is

The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is

Compressibility co-efficient for an absolutely compressible cake is

Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill.

In a grinding operation, the limiting particle size is the size of the __________ particle in the sample.

Screen capacity is proportional to (where, S = screen aperture)

The cummulative mass fraction of particles smaller than size d_j for a collection of N_i particles of diameter d_i and mass mi (i =...... ∞) is given by

A belt conveyor used for the transportation of materials can

Helical screw agitator is used for

Limestone is normally crushed in a

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

In ball mill operation, the feed size (D_f in meters) and the ball diameter (D_b in metres) are related as ( where, K = grindability constant (varying from 0.9 to 1.4 in increasing order of hard ness))

In a roll crusher, the specific power consumption and the production rate is affected by the

Apron conveyors are used for

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns.

In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.

Which of the following is not used as a surface active agent in a flocculation operation?

__________ mill is not a revolving mill.

Filtrate flow rate in case of a rotary drum vacuum filter (in which R_m < < R_c) is proportional to __________ and the cycle time (where, μ = filtrate viscosity R_m = filter medium resistance R_c = cake resistance ).

Mixing mechanism employed in a pan mixer is by

Chance process is used for the

__________ centrifuge is the most suitable for separation of non-friable crystals.

Actual operating speed of a ball mill may vary fromtoof the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?

For the transportation of ultrafine particles, the equipment used is a........conveyor.

Pick out the correct statement.

The main differentiation factor between tube mill and ball mill is the

Which of the following is not a revolving/tumbling mill used for size reduction?

For benefication of iron ore, the most commonly used method is

In a roll crusher, the specific power consumption and the production rate is affected by the

Compressibility co-efficient for an absolutely compressible cake is

Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a __________ surface.

Stamp mills are generally used for crushing

Which of the following equations is Rittinger's crushing law ? (where P = power required by the machine, m = feed rate, k = a constant = volume surface mean diameter of feed & product respectively.)

Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle).

What is the reduction ratio in a fine crushing operation having following feed and product sizes?

The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle).

Size reduction does not occur due to compression in case of

A widely used size reduction equipment for __________ is Bradford breaker.

Production rate __________ with increased fineness, with a given energy input to the size reduction machine.

__________ balls capable of grinding the feed in a ball mill gives the maximum efficiency.