Sail E0 Webinar

MCQs

Total Questions : 824 | Page 3 of 83 pages
Question 21. Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be
  1.    nil
  2.    5
  3.    10
  4.    15
 Discuss Question
Answer: Option A. -> nil
Question 22. For determining the velocity of flow of underground water, the most commonly used non-empirical formula is
  1.    Darcy’s formula
  2.    Slichter’s formula
  3.    Hazen’s formula
  4.    Lacy’s formula
 Discuss Question
Answer: Option A. -> Darcy’s formula
Question 23. Aeration of water is done to remove
  1.    odour
  2.    colour
  3.    bacterias
  4.    hardness
 Discuss Question
Answer: Option A. -> odour
Question 24. Disinfection of drinking water, is done to remove
  1.    odour
  2.    bacterias
  3.    turbidity
  4.    colour
 Discuss Question
Answer: Option B. -> bacterias
Question 25. Specific capacity or yield of wells, is generally expressed, as
  1.    m³/sec
  2.    m³/hour
  3.    m³/hour/m²
  4.    m³/hour/m²/m
 Discuss Question
Answer: Option D. -> m³/hour/m²/m
Question 26. The least thickness of class B cast iron (spun) pipe, is
  1.    7.2 mm
  2.    7.9 mm
  3.    8.6 mm
  4.    10 mm
 Discuss Question
Answer: Option C. -> 8.6 mm
Question 27. The maximum depth of sedimentation tanks is limited to
  1.    3 m
  2.    4 m
  3.    5 m
  4.    6 m
 Discuss Question
Answer: Option D. -> 6 m
Question 28. Corrosion of well pipes may not be reduced by
  1.    reducing the draw down and the pumping rate
  2.    reducing the flow velocity
  3.    using thicker pipes
  4.    using screens having larger area of openings
 Discuss Question
Answer: Option D. -> using screens having larger area of openings
Question 29. Pick up the incorrect statement from the following. The underground sources of water, is from
  1.    wells
  2.    springs
  3.    infiltration wells
  4.    storage reservoirs
 Discuss Question
Answer: Option D. -> storage reservoirs
Question 30. Pick up the correct statement from the following:
  1.    The water level in a still well, represents the ground water table level
  2.    The difference between water table level and the water level in a well after pumping, is called depression head
  3.    The surface of water table surrounding a well during pumping, forms a cone of depression
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above

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