Sail E0 Webinar

MCQs

Total Questions : 828 | Page 81 of 83 pages
Question 801. Cleaning is done by________________?
1) scraping and removal in filters slow sand
2) back washing in slow sand filters
3) scraping and removal in filters rapid sand
4) back washing in rapid sand filters
The correct answer is
  1.    (1) and (2)
  2.    (2) and (3)
  3.    (1) and (4)
  4.    (2) and (4)
 Discuss Question
Answer: Option C. -> (1) and (4)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 802. The chemical most commonly used to increase speed of sedimentation of sewage is_______________?
  1.    sulphuric acid
  2.    copper sulphate
  3.    lime
  4.    sodium permanganate
 Discuss Question
Answer: Option C. -> lime
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 803. The amount of coagulant needed for coagulation of water increases with_______________?
1) increase in turbidity of water
2) decrease in turbidity of water
3) increase in temperature of water
4) decrease in temperature of water
The correct answer is?
  1.    (1) and (2)
  2.    (1)and (4)
  3.    (2) and (3)
  4.    (2) and (4)
 Discuss Question
Answer: Option B. -> (1)and (4)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 804. The detention period in coagulation tanks is usually kept as_______________?
  1.    1 to 2 minutes
  2.    30 to 45 minutes
  3.    2 to 6 hours
  4.    2 to 6 days
 Discuss Question
Answer: Option C. -> 2 to 6 hours
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 805. The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about______________?
  1.    0.01 to 0.05 ppm
  2.    0.05 to 0.5 ppm
  3.    0.5 to 1.0 ppm
  4.    1.0 to 5.0 ppm
 Discuss Question
Answer: Option B. -> 0.05 to 0.5 ppm
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 806. The settling velocity of a particle in a sedimentation tank depends on__________________?
  1.    depth of tank
  2.    surface area of tank
  3.    both depth and surface area of tank
  4.    none of the above
 Discuss Question
Answer: Option B. -> surface area of tank
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 807. The settling velocity of a particle in a sedimentation tank increases if_________________?
  1.    particle size is decreased
  2.    the surface area of tank is increased
  3.    the depth of tank is decreased
  4.    none of the above
 Discuss Question
Answer: Option D. -> none of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 808. For a given discharge, the efficiency of sedimentation tank can be increased by______________?
  1.    increasing the depth of tank
  2.    decreasing the depth of tank
  3.    increasing the surface area of tank
  4.    decreasing the surface area of tank
 Discuss Question
Answer: Option C. -> increasing the surface area of tank
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 809. Orthotolidine test is used for determination of________________?
  1.    dissolved oxygen
  2.    residual chlorine
  3.    biochemical oxygen demand
  4.    dose of coagulant
 Discuss Question
Answer: Option B. -> residual chlorine
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 810. The velocity of flow of water in a sedimentation tank is about__________________?
  1.    5 to 10 cm/sec.
  2.    15 to 30 cm/sec.
  3.    15 to 30 cm/minute
  4.    15 to 30 cm/hour
 Discuss Question
Answer: Option C. -> 15 to 30 cm/minute
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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

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
DSP Combined 1 Free Revision Test SAIL JO E-0