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MCQs

Total Questions : 2215 | Page 222 of 222 pages
Question 2211. Pick out the correct statement?
  1.    Angle of repose is always greater than the angle of slide
  2.    A hopper is a small bin with a sloping bottom
  3.    A silo is a short height vessel of very large diameter used for the storage of high volatile matter coal
  4.    Pine oil is used as a ‘modifying agent’ (for activating or depressing the adsorption of filming agents) in froth floatation process
 Discuss Question
Answer: Option B. -> A hopper is a small bin with a sloping bottom
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2212. Pick out the wrong statement?
  1.    Cumulative analysis for determining surface area is preferred over differential analysis, because of the assumption that “all particles in a simple
  2.    A gate diagram is a plot of cumulative percent by weight undersize vs. the reciprocal of diameter, in which the area beneath the curve represents the
  3.    Capacity of crusher in choke feeding is increased
  4.    Rolling of pebbles/balls from top to bottom of the heap in tumbling mills is called ‘cascading and throwing of the balls through the air to the toe
 Discuss Question
Answer: Option C. -> Capacity of crusher in choke feeding is increased
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2213. Pick out the wrong statement pertaining to the turbine agitator ?
  1.    Recommended peripheral speed for the turbine agitator is 200-250 metres/minute
  2.    Pitched blade turbine agitator gives only radial flow with complete absence of the axial flow
  3.    Generally, the diameter of the agitator is kept between l/3rd to l/6th of the tank diameter while the blade length is l/4th of agitator diameter (with
  4.    Turbine agitator should be located at a height not less than one agitator diameter length from the bottom. If the depth of liquid in the tank is more
 Discuss Question
Answer: Option B. -> Pitched blade turbine agitator gives only radial flow with complete absence of the axial flow
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2214. Pick out the wrong statement ?
  1.    Magnetic separation method can be employed to treat both dry & wet ores
  2.    Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size
  3.    Gyratory crusher is used for coarse crushing
  4.    Screens are of stationary, moving and vibratory types
 Discuss Question
Answer: Option B. -> Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2215. Pick out the wrong statement ?
  1.    For the compressible cake, voidage & the specific resistance of the cake can be assumed to be constant
  2.    Cake resistance is independent of the pressure drop
  3.    Crushing of explosive materials are done by employing dry-grinding
  4.    Gyratory crusher is a coarse crusher
 Discuss Question
Answer: Option B. -> Cake resistance is independent of the pressure drop
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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