Material of construction of surveying metallic tapes is __________ which has low coefficient of expansion & enough strength.

Question: Percentage of gaunge is maximum in the ore of
[A].

iron

[B].

gold

[C].

zinc

[D].

copper

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ is used as a material of construction for the blade of power saw.
[A].

Wrought iron

[B].

Stainless steel

[C].

Mild steel

[D].

High speed steel

Answer: Option D

Explanation:

No answer description available for this question.