Sail E0 Webinar

MCQs

Total Questions : 918 | Page 3 of 92 pages
Question 21. Which is the most widely used coagulant for the treatment of turbid water?
  1.    Alum (aluminium sulphate)
  2.    Lime
  3.    Ferric chloride
  4.    Sodium aluminate
 Discuss Question
Answer: Option A. -> Alum (aluminium sulphate)
Question 22. Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
  1.    Hydrogen sulphide
  2.    Mercury
  3.    Cadmium
  4.    Asbestos
 Discuss Question
Answer: Option C. -> Cadmium
Question 23. Green house effect is accentuated by
  1.    Deforestation
  2.    Rapid industrialisation
  3.    Increased transportation activity
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 24. Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.
  1.    20
  2.    100
  3.    400
  4.    200
 Discuss Question
Answer: Option C. -> 400
Question 25. Inhalation of silica dust by human being causes
  1.    Asphyxiation
  2.    Shortness of breath
  3.    Tuberculosis
  4.    Both B & C
 Discuss Question
Answer: Option D. -> Both B & C
Question 26. Pick out the correct statement.
  1.    Noise from ball mills can be dealt with by fibre glass lined enclosures
  2.    Noise from vibrating chutes can be reduced by lining the metallic chute with rubber
  3.    Noise of conveyor belt system is reduced by using urethane coated cloth conveyor belts and rubber/plastic covered metallic rollers
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 27. Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?
  1.    Packed scrubber
  2.    Gravity settling chamber
  3.    Electrostatic precipitator
  4.    Hydrocyclone
 Discuss Question
Answer: Option C. -> Electrostatic precipitator
Question 28. Tolerable limit of nitrogen oxides in air is __________ ppm.
  1.    0.1
  2.    1
  3.    5
  4.    25
 Discuss Question
Answer: Option C. -> 5
Question 29. Pick out the wrong statement.
  1.    Caustic embrittlement of boiler's metallic parts is caused by high concentration of caustic soda in boiler feed water
  2.    Cooling and freezing of water kills the bacteria present in it
  3.    With increasing boiler operating pressure of steam, the maximum allowable concentration of silica in feed water goes on decreasing
  4.    Dissolved oxygen content in high pressure boiler feed water should be nil
 Discuss Question
Answer: Option B. -> Cooling and freezing of water kills the bacteria present in it
Question 30. Inorganic impurities causing water pollution is
  1.    Fats
  2.    Carbohydrates
  3.    Salts of metals
  4.    Protein
 Discuss Question
Answer: Option C. -> Salts of metals

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