Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
Correct answer: A. Removed by acid pickling
- A. Removed by acid pickling
- B. Hammered into the surface
- C. Removed with coarse emery cloth
- D. Left as such to protect the surface
Explanation
Annealing can leave an oxide scale on a non-ferrous metal surface, and acid pickling dissolves this scale without mechanically damaging the underlying metal. Emery cloth is a mechanical cleaning method but is not the usual treatment specified here.
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
Case hardening is not done by________________?
Chlorine acts as a bleaching agent only in the presence of ______________________?
Powder metallurgy technique is used in the production of ____________________ tools ?
Which of the following is not used as a bearing material ?
Shampoos are commercially not available in the form of ___________________?
Which of the following is an ore dressing operation ?