Materials MCQ with Answers

Materials MCQ with Answers

1) As compared to steel, the density of aluminum is about

Answer is:

one-third

Explanation:

.

2) As compared to copper, the conductivity (both thermal and electrical ) of aluminium is about

Answer is:

59%

3) What is produced when aluminium is oxidized by water ?

Answer is:

Hydrogen

4) Which one of the following can penetrate the protective skin of aluminium and corrode the metal ?

Answer is:

Alkaline substances

5) Which one of the following metals has better electrical conductivity than copper ?

Answer is:

Silver