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MCQs

Total Questions : 70 | Page 1 of 7 pages
Question 1. What is pH below which pH increases?
  1.    7
  2.    5
  3.    4
  4.    3
 Discuss Question
Answer: Option C. -> 4
Answer: (c).4
Question 2. What is pH range for oxygen removal?
  1.    3.5-4.5
  2.    6.5-8.5
  3.    10-12
  4.    12-13.5
 Discuss Question
Answer: Option B. -> 6.5-8.5
Answer: (b).6.5-8.5
Question 3. Stainless steel is protected by _______
  1.    Iron oxide
  2.    Nitrous oxide
  3.    Chromium sesquioxide
  4.    Carbon monoxide
 Discuss Question
Answer: Option C. -> Chromium sesquioxide
Answer: (c).Chromium sesquioxide
Question 4. Increase in __________ concentration usually gives an increase in corrosion rate.
  1.    Carbon
  2.    Oxygen
  3.    Nitrogen
  4.    Iron
 Discuss Question
Answer: Option B. -> Oxygen
Answer: (b).Oxygen
Question 5. ______ are classified as dangerous inhibitors.
  1.    Cathodic inhibitors
  2.    Anodic inhibitors
  3.    Voltage
  4.    Current flow
 Discuss Question
Answer: Option B. -> Anodic inhibitors
Answer: (b).Anodic inhibitors
Question 6. Which ions are used as cathodic inhibitors?
  1.    Ferric irons
  2.    Aluminium ions
  3.    Zinc ions
  4.    Nickel ions
 Discuss Question
Answer: Option C. -> Zinc ions
Answer: (c).Zinc ions
Question 7. What is the reduced potential required to prevent the corrosion of steel?
  1.    350 mV
  2.    250 mV
  3.    150 mV
  4.    50 mV
 Discuss Question
Answer: Option A. -> 350 mV
Answer: (a).350 mV
Question 8. _______ is suited for open channel monitoring applications.
  1.    pH sensor
  2.    Ultrasonic technology
  3.    Infrared technology
  4.    Monitoring meters
 Discuss Question
Answer: Option B. -> Ultrasonic technology
Answer: (b).Ultrasonic technology
Question 9. Galvanizing is the process of applying _______ over steel.
  1.    Carbon
  2.    Aluminium
  3.    Zinc
  4.    Nickel
 Discuss Question
Answer: Option C. -> Zinc
Answer: (c).Zinc
Question 10. PH sensor must remain clean for an accurate reading.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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