Sail E0 Webinar

MCQs

Total Questions : 181 | Page 18 of 19 pages
Question 171. How many types of settling are there in the sedimentation tank?
  1.    3
  2.    4
  3.    5
  4.    6
 Discuss Question
Answer: Option B. -> 4
Answer: (b).4
Question 172. In which type of settling, settling of particles takes place by the contact of impurities with each other present in wastewater?
  1.    Flocculent settling
  2.    Hindered settling
  3.    Compression settling
  4.    Discrete settling
 Discuss Question
Answer: Option C. -> Compression settling
Answer: (c).Compression settling
Question 173. The settling velocity of spherical particle is given by ____________
  1.    Darcy Weisbach equation
  2.    Hazen and William equation
  3.    Stokes equation
  4.    Bernoulli’s equation
 Discuss Question
Answer: Option C. -> Stokes equation
Answer: (c).Stokes equation
Question 174. _______ is formed when alum is added to sewage.
  1.    Acid
  2.    Floc
  3.    Salt
  4.    Base
 Discuss Question
Answer: Option B. -> Floc
Answer: (b).Floc
Question 175. In the expression vS = 1.8 (g*d (G-1))½, the diameter of spherical particle is ____________
  1.    0.1mm
  2.    < 0.1mm
  3.    1mm
  4.    >1mm
 Discuss Question
Answer: Option D. -> >1mm
Answer: (d).>1mm
Question 176. The quantity of water flowing per hour per unit horizontal area is called ____
  1.    Detention time
  2.    Flowing through period
  3.    Displacement time
  4.    Overflow rate
 Discuss Question
Answer: Option D. -> Overflow rate
Answer: (d).Overflow rate
Question 177. Ferric chloride is effective over a pH range of __________
  1.    3.5-6
  2.    6.5-8
  3.    3.5-6.5
  4.    2-5
 Discuss Question
Answer: Option C. -> 3.5-6.5
Answer: (c).3.5-6.5
Question 178. Which of the following statement is wrong regarding Iron salt?
  1.    Iron salt produces less floc than Alum
  2.    Detention time for sedimentation by using Iron salt as coagulant is less
  3.    Handling of Iron salt requires some skills
  4.    Iron removes H₂S, taste and odor
 Discuss Question
Answer: Option A. -> Iron salt produces less floc than Alum
Answer: (a).Iron salt produces less floc than Alum
Question 179. Why Magnesium carbonate is not commonly preferred as coagulant?
  1.    It is expensive
  2.    It does not remove color
  3.    Formation of sludge
  4.    The time required for floc formation is less
 Discuss Question
Answer: Option C. -> Formation of sludge
Answer: (c).Formation of sludge
Question 180. The rate of change of velocity per unit distance normal to a section is called_______
  1.    Mean velocity
  2.    Average velocity
  3.    Mean velocity gradient
  4.    Velocity gradient
 Discuss Question
Answer: Option C. -> Mean velocity gradient
Answer: (c).Mean velocity gradient

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

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0