36701. Hot, lumpy & abrasive materials are best transported by using a/an __________ conveyor.
36702. Additives used for promoting the floccula-tion of particles is a/an
36703. In case of grinding in a ball mill
36704. The capacity of a classifier in 'tons of solid/hr' is given by (where, A = cross-sectional area, m2 V = rising velocity of fluid, m/sec.S = percentage of solids in the suspension by volume.ρ = density of solids, kg/m3)
36705. Fick's law relates to
36706. __________ mill is normally used for grinding of talc.
36707. Colloidal mills are used for __________ grinding.
36708. Fluid medium used in the classification technique of mineral beneficiation is
36709. The maximum slope of a belt conveyor can be
36710. The filter medium resistance is controlled by
36711. The unit of filter medium resistance is
36712. During size reduction by a jaw crusher, the energy consumed decreases with the
36713. Which of the following can be most effectively used for clarification of lube oil and printing ink?
36714. Ultracentrifuges running at speeds upto 100000 rpm is normally used for the
36715. Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation.
36716. In the cyclone separator used for separation of dust from dust laden gas, the gas
36717. The basic filtration equation is given as where, V is volume of the filtrate ; A is the filtration area, a is specific cake resistance, μ is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry. In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced ? Neglect filter medium resistance, Rm ; assume incompressible cake.
36718. Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the
36719. The material is crushed in a gyratory crusher by the action of
36720. The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be __________ cms.
36721. Which of the following may prove unsuitable for filtering volatile liquids ?
36722. __________ mean diameter of particles is given by
36723. Mass flow of granular solid (M) through a circular opening of dia, D follows
36724. Sauter mean diameter is the same as the __________ mean diameter.
36725. Cake resistance is
36726. In paint industries, blending of light paste is done by using a
36727. 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 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is
36728. __________ is used for producing a thick suspension from a thin slurry.
36729. Wet seiving is employed, when the product contains __________ materials.
36730. Energy requirement (per unit mass of material crushed/ground) is highest for
36731. The energy consumed by a ball mill depends on
36732. Energy consumption in a crusher decreases with increase in the
36733. 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).
36734. The term 'angle of nip' is concerned with the operation of the __________ crushers.
36735. Cartridge filters are termed as 'edge' filters, because of the fact that the
36736. Vibrating screens have capacity in the range of __________ tons/ft2 .mm mesh size.
36737. Cumulative analysis for determining surface is more precise than differential analysis, because of the
36738. To remove very small amount of tiny solid impurities from liquid, we use a
36739. Screw conveyors are
36740. __________ mills fall in the category of tumbling mills,
36741. 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)
36742. Which of the following is not a cutting machine?
36743. Weber number is significant and is concerned with the
36744. Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid.
36745. Screen efficiency is
36746. For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a
36747. Handling of ashes and similar materials can be done best by a __________ conveyor.
36748. Which of the following must be stored in silos and not in open yard ?
36749. Apron conveyors are used for
36750. Sedimentation on commercial scale occurs in
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