Mechanical Operations Questions

• Pick out the wrong statement pertaining to the roll crushers.
• The value of 'angle of nip' is generally about
• For sizing of fine materials, the most suitable equipment is a
• If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the
• Pick out the wrong statement.
• Solid particles separation based on the difference in their flow velocities through fluids is termed as the
• 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.
• Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is
• Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.
• Sulphuric acid mist is arrested by using a __________ scrubber.
• __________ is the most commonly used 'filter aid'.
• Which of the following is not a part of the Blake jaw crusher?
• Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.
• Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm)?
• Gravity settling process is not involved in the working of a
• 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)
• Which of the following mineral dressing operations is termed as 'comminution'?
• Which of the following relationships between co-efficinet of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct?
• Two particles are called to be equal settling, if they are having the same.
• Ball mills and tube mills with flint or porcelain balls are used for size reduction of