Plumbing Blueprint & Isometric Drawing Reading 2

Question 1

On a plan drawn at 1/4" = 1'-0", a pipe run measures 3 inches. What is its actual length?

Accepted Answer

12 ft

Answer

At 1/4" per foot, 3" equals 12 feet (3 ÷ 0.25).

Question 2

What should you check first when you find an unfamiliar symbol on a plumbing plan?

Accepted Answer

The legend or symbol list

Answer

The legend defines every symbol and line type used on that drawing set.

Question 3

What is the purpose of a section cut line on a plan?

Accepted Answer

Indicate where the object is sliced to produce a separate interior view

Answer

The cut line with arrows tells you where and from which direction the section view is taken.

Question 4

Which view is best for finding vertical heights of fixtures and pipe from the floor?

Accepted Answer

Elevation view

Answer

Elevation views show the building from the side, displaying vertical dimensions.

Question 5

In a standard isometric drawing, horizontal pipe runs in the two principal directions are drawn at what angle from the horizontal?

Accepted Answer

30 degrees

Answer

Isometric axes are drawn at 30° to the horizontal with vertical lines kept vertical.

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