1.

The pressure in distribution mains in a residential building up to three storeys is ____________

A. 2kg/cm<sup>2</sup>
B. 5kg/cm<sup>2</sup>
C. 7kg/cm<sup>2</sup>
D. 10kg/cm<sup>2</sup>
Answer» B. 5kg/cm<sup>2</sup>


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