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1. |
I.D. of 1/4″ schedule 40 pipe is 0.364″. I.D. of a 1/2″ schedule 40 pipe would be ______________ inch? |
A. | 4.728 |
B. | 0.5 |
C. | 0.622 |
D. | 0.474 |
Answer» D. 0.474 | |