Question

Schedule numbers such as 40, 60, 80 are used to designate:

A) nominal inside diameter
B) actual inside diameter
C) nominal outside diameter
D) wall thickness
E) outside diameter

Answer 1

Schedule numbers like 40, 60, 80 refer to the wall thickness of pipes in a standardized system, with higher numbers indicating thicker walls.

Step-by-step explanation:

The term 'schedule numbers' such as 40, 60, 80 are used to designate the wall thickness of pipes, not their inside or outside diameters. These numbers are part of a standardized piping system that engineers and builders use to reference the thickness of the pipe walls in relation to its size. The higher the schedule number, the thicker the wall of the pipe, which generally implies a higher capacity to withstand pressure. So the correct answer to the question would be D) wall thickness.