Mechanical Operations Questions

• A belt conveyor used for the transportation of materials can
• Which of the following is a batch sedimentation equipment?
• Filtration rate does not depend upon the
• 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.
• Work index is defined as the
• Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill.
• The inlet pressure in a constant rate filtration
• Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of
• __________ centrifuge is the most suitable for separation of non-friable crystals.
• Raw materials are charged in the iron blast furnace using
• Which of the following screens has the maximum capacity?
• A propeller agitator
• Removal of activated carbon from glycerine is done by
• Which of the following is not used as a surface active agent in a flocculation operation?
• Which of the following is not used as filter aid?
• Which of the following is a fine crusher?
• Carbon black is pulverised in a
• Limestone is normally crushed in a
• What is the reduction ratio in a fine crushing operation having following feed and product sizes?
• Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)