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MCQs

Total Questions : 2215 | Page 21 of 222 pages
Question 201. Traces of liquid tar fog present in coke oven gas is separated using
  1.    Electrostatic precipitator
  2.    Cyclone separator
  3.    Strainer
  4.    None of these
 Discuss Question
Answer: Option A. -> Electrostatic precipitator
Question 202. Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of __________ mm.
  1.    0.007
  2.    0.30
  3.    50
  4.    0.014
 Discuss Question
Answer: Option B. -> 0.30
Question 203. The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to
  1.    N°
  2.    N¹
  3.    N²
  4.    N³
 Discuss Question
Answer: Option C. -> N²
Question 204. Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about
  1.    1 to 2°
  2.    2 to 5°
  3.    5 to 10°
  4.    10 to 15°
 Discuss Question
Answer: Option B. -> 2 to 5°
Question 205. Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.
  1.    Constant rate
  2.    Varying pressure
  3.    Varying rate
  4.    Constant pressure
 Discuss Question
Answer: Option A. -> Constant rate
Question 206. In paint industries, blending of light paste is done by using a
  1.    Masticator
  2.    Charge can mixer
  3.    Kneader
  4.    None of these
 Discuss Question
Answer: Option B. -> Charge can mixer
Question 207. Close circuit grinding by a ball mill with air sweeping employs a
  1.    Classifier
  2.    Cyclone separator between mill & classifier
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 208. 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)
  1.    3.6 W.D.V.ρ
  2.    3.6 W.D.V.
  3.    3.6 W.V.ρ
  4.    3.6 D.V.ρ
 Discuss Question
Answer: Option A. -> 3.6 W.D.V.ρ
Question 209. Which of the following is a pressure filter?
  1.    Leaf filter (Moore filter)
  2.    Plate and flame filter
  3.    Rotary drum filter
  4.    Sand filter
 Discuss Question
Answer: Option B. -> Plate and flame filter
Question 210. __________ mill is normally used for grinding of talc.
  1.    Tube
  2.    Compartment
  3.    Ring-roll
  4.    Pebble
 Discuss Question
Answer: Option C. -> Ring-roll

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