Civil Engineering - Building Materials - Discussion

27. 

The type of steel used for precision levelling staff, is

[A]. Titanium steel
[B]. Carbon steel
[C]. Invar
[D]. Stainless steel.

Answer: Option C

Explanation:

No answer description available for this question.

Peter Parker said: (May 14, 2013)  
Invar has less expasion property due to change in temperature.

Inayat Ullah Khan said: (Feb 4, 2021)  
Due to low coefficient of thermal expansion, it is mostly used for precision levelling staff.

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