Blueprint Reading Flashcards

What does the abbreviation 'TYP' mean when placed next to a dimension on a blueprint?

Answer: Typical — applies to all similar features

'TYP' means 'Typical' and indicates that the dimension or note applies to all identical or similar features on the drawing.

In a piping isometric drawing, what does a small circle on a pipe line with an X through it typically represent?

Answer: A globe valve (closed)

A circle with an X symbol on piping isometrics commonly represents a globe valve, with the X indicating the handwheel or closure device.

What is the purpose of a revision cloud on a blueprint?

Answer: To highlight areas that have been changed since the last issue

A revision cloud is a series of arcs drawn around an area of a drawing to highlight changes made after the original issue.

On a structural steel blueprint, what does the designation W8x31 refer to?

Answer: A wide-flange beam 8 inches deep weighing 31 pounds per foot

W8x31 designates a wide-flange (W-shape) structural steel section that is approximately 8 inches deep and weighs 31 pounds per linear foot.

What does the symbol '⌀' (diameter symbol) before a number on a blueprint indicate?

Answer: The dimension refers to a circular feature's diameter

The ⌀ symbol placed before a dimension value indicates that the measurement is the diameter of a circular feature such as a hole or shaft.

What is the function of a match line on a large blueprint set?

Answer: It shows where one drawing sheet continues on another sheet

A match line shows where a large drawing has been split across multiple sheets and where the adjoining sheet continues the plan.

On a blueprint, what does the abbreviation 'NTS' mean?

Answer: Not To Scale

'NTS' means Not To Scale, indicating that the drawn feature or dimension should not be measured directly from the drawing.