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MCQs

Total Questions : 71 | Page 4 of 8 pages
Question 31. Find the activated diffusivity of carbon if energy of activation is 6 kJ; the value of constant diffusivity is 2.5 sq.m/sec. (Hint: the value of exponential of (-6/RT) is 2.55)
  1.    6.375 sq.m/s
  2.    1.02 sq.m/s
  3.    15.3 sq.m/s
  4.    16.25 sq.m/s
 Discuss Question
Answer: Option A. -> 6.375 sq.m/s
Answer: (a).6.375 sq.m/s
Question 32. The solute movement of fluid on solids are __________
  1.    Hygrodynamic
  2.    Hydrodynamic
  3.    Fluid dynamic
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Hydrodynamic
Answer: (b).Hydrodynamic
Question 33. If the pore of the solid is inaccessible to external fluids then it is known as dead end.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 34. For permanent gases diffusivity the order is _________ sq.m/s
  1.    10⁻⁷
  2.    10⁻⁸
  3.    10⁻⁹
  4.    10⁻¹⁰
 Discuss Question
Answer: Option D. -> 10⁻¹⁰
Answer: (d).10⁻¹⁰
Question 35. Find the permeability if diffusivity is 2 units and solubility coefficient is 5 units assume all are in SI units.
  1.    10 units
  2.    2.5 units
  3.    0.4 units
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> 10 units
Answer: (a).10 units
Question 36. Macroporic surrounding of microscopic pellets powders of different magnitude in size is _______
  1.    Disperse
  2.    Bi-disperse
  3.    Tri-disperse
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Bi-disperse
Answer: (b).Bi-disperse
Question 37. Before collision, the distance between the two particles is mean free path.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 38. Find the total flux for a particle A and B in a steady state if flux of A and B is 2.44 and 4.44 mol/sq.m sec.
  1.    2
  2.    4.88
  3.    6.88
  4.    8
 Discuss Question
Answer: Option C. -> 6.88
Answer: (c).6.88
Question 39. Find J flux of A ( xA = 0.5) if the total N flux is 6 mol/sq.m sec and N flux of A is 3 mol/sq.m sec.
  1.    0
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option A. -> 0
Answer: (a).0
Question 40. Diffusion co-efficient in molecular diffusion is estimated by _________
  1.    Daltons law
  2.    Diffusion law
  3.    Ficks law
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Ficks law
Answer: (c).Ficks law

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