Ball bearings are, usually, made from

Question: Duralumin contains
[A].

3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium

[B].

3.5 to 4.5% copper, 1.2 to 1.7% managanese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

[C].

4 to 4.5% magnesium, 3 to 4% copper and rest aluminium

[D].

5 to 6% tin, 2 to 3% copper and rest aluminium

Answer: Option A

Explanation:

No answer description available for this question.

Question: Muntz metal (Yellow brass) contains
[A].

70% copper and 30% zinc

[B].

60% copper and 40% zinc

[C].

59% copper, 40% zinc and 1% tin

[D].

60.45% copper, 35.2% zinc and 5.35% nickel

Answer: Option B

Explanation:

No answer description available for this question.