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- 1. Multiple ChoiceWhat is corrosion?The release of oxygenBreakdown of a metal
- 2. Multiple ChoiceWhat is an ore?A combination of carbon and ironA combination of metal and other elementsA combination of elements and oxideA combination of metal and carbon
- 3. Multiple ChoiceWhich of the following is NOT a harmful effect of corrosion?Bad appearanceMaintenance costClean productPlant shutdown
- 4. Multiple ChoiceIron rust in the presence of:VacuumMoistureOxygenMoisture and Oxygen
- 5. Multiple Choice
Is this an example of corrosion?YesNo - 6. Multiple Choice
What is the chemical nature of rust?
iron (II) oxide
hydrated iron (II) oxide
iron (III) oxide
hydrated iron(III) oxide
- 7. Multiple ChoiceTo protect iron against corrosion, the most durable metal plating on it, is:Zinc platingNickel plating
- 8. Multiple Choice
Which diagram shows the most favourable conditions for rust to appear on the nail?
A
B
C
D
- 9. Multiple Choice
Which of the following is / are examples of sacrificial protection against rusting?
(1) Iron object coated with tin
(2) Underground iron pipes connected to magnesium bars
(3) Iron railings coated with paint
(1) only
(2) only
(1) and (3) only
(2) and (3) only
- 10. Multiple Choice
Galvanizing is a process of:
Applying a Zinc coating to bare steel
Washing the body with the phosphate coating
dipping a body in E-COAT
Chemically etching primer to steel
- Answer choicesTagsAnswer choicesTags