Mechanical Operations Questions

• The maximum slope of a belt conveyor can be
• To remove very small amount of tiny solid impurities from liquid, we use a
• Energy requirement (per unit mass of material crushed/ground) is highest for
• Colloidal mills are used for __________ grinding.
• Screw conveyors are
• In case of grinding in a ball mill
• Hot, lumpy & abrasive materials are best transported by using a/an __________ conveyor.
• Cartridge filters are termed as 'edge' filters, because of the fact that the
• Fick's law relates to
• 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.
• Fluid medium used in the classification technique of mineral beneficiation is
• Which of the following can be most effectively used for clarification of lube oil and printing ink?
• Weber number is significant and is concerned with the
• Additives used for promoting the floccula-tion of particles is a/an
• 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)
• The porosity of a compressible cake is
• Which of the following conveyors cannot be recommended for transportation of abrasive materials?
• The material is crushed in a gyratory crusher by the action of
• In the cyclone separator used for separation of dust from dust laden gas, the gas
• In paint industries, blending of light paste is done by using a