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Mechanical Engineering · Q31

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 31

Q31

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

Answer: Option D

Solution

Answer: Option D
Solution:
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
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