Sail E0 Webinar

MCQs

Total Questions : 73 | Page 6 of 8 pages
Question 51. . For the turbulent flow, the dispersion coefficient is correlated as a function of
  1.    Reynolds number
  2.    Sherwood number
  3.    Schmidt number
  4.    Grashof number
 Discuss Question
Answer: Option A. -> Reynolds number
Question 52. . In sterilization process, spore of which of the following organism is considered as control?
  1.    Bacillus subtilis
  2.    Clostridium botulinum
  3.    Bacillus stearothermophilus
  4.    Aspergillus niger
 Discuss Question
Answer: Option C. -> Bacillus stearothermophilus
Question 53. . Analogus to the molecular diffusion, the x-directional flux of microorganisms suspended in a medium due to the axial mixing can be represented as (where Jn is flux component 'n', cn is concentration of'n')
  1.    Jn = -dcn/dx
  2.    Jn = dcn/dx
  3.    Jn = -D dcn/dx
  4.    Jn = D dcn/dx
 Discuss Question
Answer: Option C. -> Jn = -D dcn/dx
Question 54. . The typical size of particles collected by diffusion mechanism is
 Discuss Question
Answer: Option C. -> Jn = -D dcn/dx
Question 55. . The X90 value for a filtration system is
  1.    The time required to reduce microbial population by 90%
  2.    the time required to traverse survivor curve by one log cycle.
  3.    the depth required to reduce population by 90%
  4.    the depth of the filter required to reduce population by 99%
 Discuss Question
Answer: Option C. -> the depth required to reduce population by 90%
Question 56. . The value of K
  1.    increases with increase in air velocity
  2.    decreases with increase in air velocity
  3.    increases to an optimum with increase in air velocity and decreases on further increase of air velocity
  4.    none of these
 Discuss Question
Answer: Option C. -> increases to an optimum with increase in air velocity and decreases on further increase of air velocity
Question 57. . Model proposed by the Friedlander, correlating the air filtration efficiency by impaction can be expressed as (where NSt is the Stokes number)
  1.    ηimp = 0.075NSt1.2
  2.    ηimp = 0.75NSt1.2
  3.    ηimp = 0.25NSt1.2
  4.    ηimp = 0.025NSt1.2
 Discuss Question
Answer: Option A. -> ηimp = 0.075NSt1.2
Question 58. . The efficiency of fibrous filter by combined mechanism is given by(where ηimp,ηint,ηdif are the efficiencies by impaction, interception and diffusion respectively)
  1.    1 - ηimpηintηdif
  2.    1 - (1 - ηimp)(1 - ηint)( 1 - ηdif)
  3.    1 - ( ηimpηint/ηdif)
  4.    None of the above
 Discuss Question
Answer: Option A. -> 1 - ηimpηintηdif
Question 59. . The collection efficiency by impaction increases with
  1.    increasing particle diameter
  2.    increasing air flow velocity
  3.    both (a) and (b)
  4.    increasing particle size
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 60. . For laminar flow of Newtonian fluid through a smooth round pipe, the ratio of average fluid velocity to the maximum velocity is
  1.    0.5
  2.    0.75
  3.    0.87
  4.    0.37
 Discuss Question
Answer: Option A. -> 0.5

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GPOE / GPA Combined 1 Free Mock Test SAIL JO E-0 2024
Chapter 3.1 : INTRODUCTION Chapter 3 : Sinter Plant SAIL E0 - GPOE/GPA 2024
Chapter 2.3 : COAL HANDLING PLANT - Set 1 Chapter 2 : Coke Ovens and Coal Chemicals SAIL E0 - GPOE/GPA 2024
Chapter 1.1 : INTRODUCTION Chapter 1 : Raw Material Handling Plant SAIL E0 - GPOE/GPA 2024