Quiz  /  Corrosion Class 10 MCQ Questions With Answers

  • 1. 
    Is this an example of corrosion?

  • Yes
  • No

  • 2. 
    Rusting is a special term, given to the corrosion metal is... .

  • Au
  • Fe
  • Pt
  • Ag

  • 3. 
    What is corrosion?

  • The release of oxygen
  • Breakdown of a metal

  • 4. 
    Name the two general classifications of corrosion

  • Direct chemical attack and Electrochemical attack
  • Fretting corrosion and Galvanic attack.

  • 5. 
    Iron rust in the presence of:

  • Oxygen
  • Vacuum
  • Moisture
  • Moisture and Oxygen

  • 6. 
    To protect iron against corrosion, the most durable metal plating on it, is:

  • Zinc plating
  • Nickel plating

  • 7. 
    What is the chemical nature of rust?

  • iron (II) oxide
  • hydrated iron (II) oxide
  • iron (III) oxide
  • hydrated iron(III) oxide

  • 8. 
    What conditions are required for rusting?

  • water only
  • oxygen only
  • water and oxygen

  • 9. 
    Rusting can be prevented by

  • Alloying
  • Tinning
  • Galvanizing
  • All of above

  • 10. 
    Which of these is a common cause of corrosion?

  • Untreated metal
  • Spilled battery acid
  • Incorrect alloying
  • Water in fuel

  • 11. 
    Which diagram shows the most favourable conditions for rust to appear on the nail?

  • A
  • B
  • C
  • D

  • 12. 
    Corrosion on magnesium can be identified as

  • Reddish - brown oxide
  • Blue - greenish powdery deposit
  • Grey colour deposits
  • White spots on the surface

  • 13. 
    Fretting corrosion occurs when there is

  • Deep scratch
  • Cut on the metal
  • Small movement between two materials against each other
  • Pitting corrosion

  • 14. 
    Electrochemical corrosion must have

  • Cathode, anode and electrolyte
  • Cathode ,anode and aluminium
  • Anode , cathode and nickel
  • Anode ,cathode and magnesium

  • 15. 
    Lead-acid battery acid deposits can be cleaned with

  • Sulphuric acid
  • Sulphur and Lime
  • Hot distilled water
  • Sodium bicarbonate

  • 16. 
    Corrosion at the grain boundaries is called

  • Fretting corrosion
  • Filiform corrosion
  • Surface corrosion
  • Intergranular corrosion

  • 17. 
    Anodising treatment of aluminium

  • produces a coating of aluminium oxide on the surface
  • produces a coating of iron oxide on the surface
  • produces a coating of magnesium oxide on the surface
  • produces a coating of titanium dioxide on the surface

  • 18. 
    The corrosion caused, when two dissimilar metals touch each other

  • Fatigue corrosion
  • Galvanic corrosion
  • Fretting corrosion
  • Surface corrosion

  • 19. 
    Corrosion on brass or bronze appears as

  • Reddish-brown oxide
  • White spots on the surface
  • Dark spots on the surface
  • Blue-green powdery deposit

  • 20. 
    Black marks from a rivet on engine cowling and wing skins are due to

  • Filiform corrosion
  • Pitting corrosion
  • Fretting corrosion
  • Intergranular corrosion
Report Question
warning
access_time
  Time