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MCQs

Total Questions : 100 | Page 8 of 10 pages
Question 71. Which heavy metal is found in cooling water treatment?
  1.    Zinc
  2.    Arsenic
  3.    Lead
  4.    Copper
 Discuss Question
Answer: Option A. -> Zinc
Answer: (a).Zinc
Question 72. Colour is contributed to which of the following?
  1.    Natural organic matter
  2.    Inorganic compounds
  3.    Total dissolved solids
  4.    Suspended solids
 Discuss Question
Answer: Option A. -> Natural organic matter
Answer: (a).Natural organic matter
Question 73. How is hardness represented?
  1.    Hardness = 2 ( Ca²⁺) +2( Mg²⁺)
  2.    Hardness = Ca ²⁺ + 2 (Mg ²⁺)
  3.    Hardness = 3(Ca ²⁺) + Mg ²⁺
  4.    Hardness = 3(Ca ²⁺) +2( Mg²⁺)
 Discuss Question
Answer: Option A. -> Hardness = 2 ( Ca²⁺) +2( Mg²⁺)
Answer: (a).Hardness = 2 ( Ca²⁺) +2( Mg²⁺)
Question 74. What is the level of Calcium carbonate for a moderately hard water?
  1.    Hardness >150 ppm
  2.    Hardness= 50 ppm
  3.    Hardness is in between 50-100 ppm
  4.    Hardness <50 ppm
 Discuss Question
Answer: Option C. -> Hardness is in between 50-100 ppm
Answer: (c).Hardness is in between 50-100 ppm
Question 75. How is TDS and conductivity related?
  1.    TDS = 0.5 conductivity
  2.    Conductivity= 0.5 TDS
  3.    TDS=3 Conductivity
  4.    TDS=Conductivity
 Discuss Question
Answer: Option A. -> TDS = 0.5 conductivity
Answer: (a).TDS = 0.5 conductivity
Question 76. Poppet valves are used in piston engines.
  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. In globe valves, the flow rate control is determined by _______
  1.    Size of the opening
  2.    Lift of the valve plug
  3.    Pressure difference
  4.    Gravity
 Discuss Question
Answer: Option B. -> Lift of the valve plug
Answer: (b).Lift of the valve plug
Question 78. What is the purpose of pinch valve?
  1.    Hydraulic control
  2.    Slurry flow regulation
  3.    Flow control
  4.    Regulate fluids
 Discuss Question
Answer: Option B. -> Slurry flow regulation
Answer: (b).Slurry flow regulation
Question 79. Diaphragm valves are used to control flow by a movement of a diaphragm.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 80. What is the other name for the plug valve?
  1.    Needle valve
  2.    Slim valve
  3.    Poppet valve
  4.    Spool valve
 Discuss Question
Answer: Option B. -> Slim valve
Answer: (b).Slim valve

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