Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is
A. Silver metal
B. Duralumin
C. Hastelloy
D. Invar
Answer: Option D
Solution (By Examveda Team)
Invar is an alloy of iron and nickel with a negligible coefficient of expansion,.and it is used in the making of clocks and scientific instruments like surveying tapes
This Question Belongs to Mechanical Engineering >> Engineering Materials
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