Which of the following is an example of cathodic protection of metals against corrosion ?
Correct answer: B. Galvanised iron
- A. Painted steel
- B. Galvanised iron
- C. Case hardened steel
- D. Lead lined reactor
Explanation
In galvanised iron, zinc acts as a sacrificial anode and corrodes preferentially, keeping the underlying iron cathodic and protected. Paint provides a barrier but is not, by itself, cathodic protection.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
With increase in ___________________ Knocking tendency in a spark ignition petrol engine decreases?
An atom bomb works on the principle of __________________?
Neutrons are present in all atoms except that of ___________________?
Out of the following, the alloy which has equal percentage of constituents, is__________________?
Tesla metre per ampere (T. m/A) is the unit for the measurement of_______________?
Silicon crystal can be converted to p-type semi-conductor by doping with__________________?