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MCQs

Total Questions : 2215 | Page 19 of 222 pages
Question 181. 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)
  1.    M/ρ . Vp
  2.    M . ρ/Vp
  3.    M . Vp/ρ
  4.    Vp/m . ρ
 Discuss Question
Answer: Option A. -> M/ρ . Vp
Question 182. To get ultrafine particles, the equipment used is a
  1.    Ball mill
  2.    Rod mill
  3.    Hammer crusher
  4.    Fluid energy mill
 Discuss Question
Answer: Option D. -> Fluid energy mill
Question 183. A tube mill as compared to a ball mill
  1.    Employs smaller balls
  2.    Gives finer size reduction but consumes more power
  3.    Has larger length/diameter ratio (>2 as compared to 1 for ball mill)
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 184. Tank filter (e.g., Nutsch filter) is
  1.    A high pressure filter
  2.    A continuous filter
  3.    Used for small scale filtration work
  4.    A leaf filter
 Discuss Question
Answer: Option C. -> Used for small scale filtration work
Question 185. Vacuum filter is most suitable for the
  1.    Removal of fines from liquid
  2.    Liquids having high vapour pressure
  3.    Liquids of very high viscosity
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 186. In case of a ball mill,
  1.    Coarse feed requires a larger ball
  2.    Fine feed requires a larger ball
  3.    Operating speed should be more than the critical speed
  4.    None of these
 Discuss Question
Answer: Option A. -> Coarse feed requires a larger ball
Question 187. In case of a hammer crusher,
  1.    Crushing takes place by impact breaking
  2.    Maximum acceptable feed size is 30 cms
  3.    Reduction ratio can be varied by adjusting the distance from cage to hammers
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 188. Which of the following is not used as a filter medium in case of corrosive liquids?
  1.    Nylon
  2.    Glass cloth
  3.    Metal cloth of monel or stainless steel
  4.    Cotton fabric
 Discuss Question
Answer: Option D. -> Cotton fabric
Question 189. Which of the following is not used as filter aid?
  1.    Asbestos
  2.    Diatomaceous earth
  3.    Purified wood cellulose
  4.    Rice husk
 Discuss Question
Answer: Option D. -> Rice husk
Question 190. __________ is the most suitable for compounding rubber and plastic solids.
  1.    Banbery mixer
  2.    Pan mixer
  3.    Pug mill
  4.    Charge can mixer
 Discuss Question
Answer: Option A. -> Banbery mixer

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