Q.1
The maximum slope of a belt conveyor can be
Q.2
During agitation of liquids, power consumption during laminar flow is not proportional to the
Q.3
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.
Q.4
For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter.
Q.5
Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for
Q.6
__________ mills are termed as impactors.
Q.7
The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an
Q.8
Which of the following is a continuous filter?
Q.9
__________ mill is not used for grinding wheat into flour and for milling of cereals & other vegetable products.
Q.10
Traces of liquid tar fog present in coke oven gas is separated using
Q.11
Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of __________ mm.
Q.12
The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to
Q.13
Gelatinous solid (which plug the septum) can be filtered by a __________ filter.
Q.14
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.
Q.15
Use of baffles in agitators help in minimising the __________ tendency.
Q.16
Pick out the wrong statement pertaining to the turbine agitator.
Q.17
A gravity decanter is meant for the separation of two __________ density.
Q.18
In paint industries, blending of light paste is done by using a
Q.19
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)
Q.20
Close circuit grinding by a ball mill with air sweeping employs a
Q.21
The sphericity of a cylinder of 1 mm diameter and length 3 mm is
Q.22
Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about
Q.23
Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.
Q.24
In case of a ball mill,
Q.25
In case of a hammer crusher,
Q.26
Which of the following is not used as a filter medium in case of corrosive liquids?
Q.27
Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles)
Q.28
Filter medium resistance is that offered by the
Q.29
Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?
Q.30
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).
Q.31
The reduction ratio for fine grinders is
Q.32
Which of the following agitators having a large blade area, rotating at slow speed is used for mixing high viscosity liquids ( > 50000 centipoise)?
Q.33
Which of the following is a pressure filter?
Q.34
__________ mill is normally used for grinding of talc.
Q.35
Which of the following is not used as filter aid?
Q.36
__________ is the most suitable for compounding rubber and plastic solids.
Q.37
A tube mill as compared to a ball mill
Q.38
Tank filter (e.g., Nutsch filter) is
Q.39
Toothed roll crushers achieve size reduction by
Q.40
Colloid mills achieve size reduction mainly by
Q.41
Addition of filter aid to the slurry before filtration is done to ...... of the cake.
Q.42
Fibrous material is broken by a
Q.43
Mesh indicates the number of holes per
Q.44
Size reduction mechanism used in Jaw crushers is
Q.45
Width and speed of a conveyor belt depends upon the __________ of the material.
Q.46
The crushed material received for separation is called feed or
Q.47
Vacuum filter is most suitable for the
Q.48
Solid particles separation based on the difference in their flow velocities through fluids is termed as the
Q.49
Soft & non-abrasive materials can be made into fines by
Q.50
Which of the following terminology is not used for size reduction of materials to fine sizes or powders?
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