1.

Which of the following is NOT true about PVC pipes?

A. They have no problem of incrustation
B. They possess low coefficient of expansion as compared to cast-iron or galvanized-iron pipes
C. They have good insulation properties hence the temperature of water passing through such pipes is not effected by outside temperature
D. They possess high Hazen Williams Constant and it results into adaptation of smaller size of PVC pipes compared to other conventional materials
Answer» C. They have good insulation properties hence the temperature of water passing through such pipes is not effected by outside temperature


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