Prevention MCQ

Test your knowledge with important Prevention MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Prevention MCQs at Bissoy

• Which of the following is/are included in the general term avoid heterogeneity?
  ক

  Dissimilar metal contact

  খ

  Different phases such as vapor spaces

  গ

  Uneven heat and stress contribution

  ঘ

  Dissimilar metal contact, different phases such as vapor spaces, and uneven heat and stress distribution.
• Uneven temperature distribution leads to higher corrosion rates and may result in stress-corrosion cracking failure.
  ক

  True

  খ

  False
• Which of the following is not a design rule for corrosion prevention?
  ক

  Riveting the tanks rather than welding

  খ

  Specify operating and maintenance procedures

  গ

  Tank bottoms should be sloped toward drain holes

  ঘ

  Avoid electrical contact between dissimilar metals
• Which of the following is the design rule to reduce erosion-corrosion?
  ক

  Avoid excessive mechanical stress

  খ

  Avoid sharp bend in piping systems

  গ

  Avoid sharp bends in piping systems and provide thicker sections to reduce impingement effects

  ঘ

  Avoid sharp bends in the piping system and excessive mechanical stress
• Which of the following is/are the design rules for corrosion prevention?
  ক

  Weld rather than riveting containers

  খ

  Design systems for easy replacement of components that fails rapidly

  গ

  Avoid excessive mechanical stress and stress concentration

  ঘ

  Weld rather than riveting containers, design systems for easy replacements of components that fail rapidly, and avoid excessive mechanical stress and stress concentration
• What should be the approximate thickness of a wall for better performance if the corrosion rate of that wall is estimated as 1/8 inches in 1 year?
  ক

  1/2 inches

  খ

  1/8 inches

  গ

  1/4 inches

  ঘ

  1/16 inches
• Since corrosion is a penetrating action, it is necessary to make allowances for the reduction in thickness in designing pipes and tanks.
  ক

  True

  খ

  False
• Which of the following is/are the functions of magic devices or water-conditioning gadgets?
  ক

  Prevent scaling

  খ

  Destroy bacteria

  গ

  Reduce water hardness

  ঘ

  Prevent scaling, destroy bacteria and reduce water hardness
• Which of the following belongs to the alteration of the environment to minimize corrosion?
  ক

  Decreasing velocity

  খ

  Removing oxygen and oxidizers

  গ

  Changing concentration

  ঘ

  Decreasing velocity, removing oxygen and oxidizers and changing the concentration
• Boiling seawater is less corrosive than that of hot seawater.
  ক

  True

  খ

  False
• Which of the following type of materials possess excellent corrosion and high-temperature resistance?
  ক

  Metals

  খ

  Plastics

  গ

  Ceramics

  ঘ

  Both ceramics and metals
• Which of the following is/are the different classes of non-metallics?
  ক

  Ceramics and wood

  খ

  Plastics and ceramics

  গ

  Wood, ceramics, and plastic

  ঘ

  Ceramics only
• Which of the following type of zirconium is used in an atomic-energy application?
  ক

  Induction-melted zirconium

  খ

  Arc-melted zirconium

  গ

  Both arc-melted and induction-melted zirconium

  ঘ

  Neither arc-melted nor induction melted zirconium
• Which of the following material is used for handling hydrogen peroxide?
  ক

  Commercially pure metals

  খ

  Alloys

  গ

  Both commercially pure metal and alloys

  ঘ

  Neither commercially pure metals nor alloys
• Which of the following metal is/are the correct combination for reducing or non-oxidizing environment?
  ক

  Nickel and its alloys

  খ

  Copper and its alloys

  গ

  Stainless steels

  ঘ

  Nickel, copper and its alloys
• Which of the following metal is the best material selection combination for distilled water?
  ক

  Tin

  খ

  Lead

  গ

  Titanium

  ঘ

  Nickel
• Which of the following metal is the best material selection combination for the caustic environment?
  ক

  Titanium

  খ

  Nickel and its alloys

  গ

  Steels

  ঘ

  Aluminum and its alloys
• Which of the following metal is the best material selection combination for the nitric acid environment?
  ক

  Tin

  খ

  Nickel and its alloys

  গ

  Stainless steels

  ঘ

  Steel
• Which of the following types of corrosion in which stainless steels are more susceptible than ordinary steels?
  ক

  Pitting corrosion

  খ

  Stress-corrosion cracking

  গ

  Intergranular corrosion

  ঘ

  Stress-corrosion cracking, pitting and intergranular corrosion
• Which of the following composition range is correct regarding stainless steel?
  ক

  11.5 to 30% chromium and 10 to 22% nickel

  খ

  11.5 to 30% chromium and 0 to 22% nickel

  গ

  0 to 30% chromium and 0 to 22% nickel

  ঘ

  0 to 30% chromium and 10 to 22% nickel
• The most common method of preventing corrosion is the selection of the proper metal or alloy for a particular corrosive service.
  ক

  True

  খ

  False