19) Question: - A property of metal by virtue of which it can resist wear, penetration and scratching by
other materials is known as its __________
Option A: -Machineability
Option B: -toughness
Option C: -tensile strength
Option D: -hardness
20) Question: - An alloy used in making parts of aeroplane is.....
Option A: - Brass
Option B: - Duralumin
Option C: - stainless steel
Option D: - Gun metal
Answers
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Answer:option b - toughness
Explanation:
vedubhaiya:
answer for 20th question plz
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