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MCQs

Total Questions : 88 | Page 8 of 9 pages
Question 71. What is the chemical used to prevent H₂S gas formation from Magnesium hydroxide?
  1.    Calcium nitrate
  2.    Ferric nitrate
  3.    Oxygen injection
  4.    Carbon injection
 Discuss Question
Answer: Option A. -> Calcium nitrate
Answer: (a).Calcium nitrate
Question 72. What is the chemical used to prevent H₂S gas formation from Sodium hydroxide?
  1.    Ferric chloride
  2.    Magnesium hydroxide
  3.    Ferric nitrate
  4.    Calcium nitrate
 Discuss Question
Answer: Option C. -> Ferric nitrate
Answer: (c).Ferric nitrate
Question 73. What is the limit of H₂S exposure for 30 minutes?
  1.    0.5 ppm
  2.    1 ppm
  3.    1.5 ppm
  4.    2 ppm
 Discuss Question
Answer: Option D. -> 2 ppm
Answer: (d).2 ppm
Question 74. What is the chemical used to prevent H₂S gas formation from Ferric chloride?
  1.    Magnesium hydroxide
  2.    Sodium hydroxide
  3.    Oxygen injection
  4.    Ferric nitrate
 Discuss Question
Answer: Option C. -> Oxygen injection
Answer: (c).Oxygen injection
Question 75. Water is recycled into the atmosphere by vegetation through the process called ______
  1.    Evaporation
  2.    Evapotranspiration
  3.    Precipitation
  4.    Runoff
 Discuss Question
Answer: Option B. -> Evapotranspiration
Answer: (b).Evapotranspiration
Question 76. Storm water can even occur as snow melts.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 77. Pollutants entering surface waters during precipitation events is termed ________
  1.    Runoff
  2.    Polluted runoff
  3.    Contaminated runoff
  4.    Water flow
 Discuss Question
Answer: Option B. -> Polluted runoff
Answer: (b).Polluted runoff
Question 78. Which of the following is not a negative effect of storm water?
  1.    Volume
  2.    Runoff
  3.    Potential contaminants
  4.    Evaporation
 Discuss Question
Answer: Option D. -> Evaporation
Answer: (d).Evaporation
Question 79. What is the power of diminishment of van der Waals force with respect to distance?
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6
Answer: (c).6
Question 80. The European WC contains attached trap.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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