CPI Blueprint & Schematic Interpretation 2

Question 1

On an electrical schematic, what does a dashed line between two components typically represent?

Accepted Answer

A mechanical linkage or association

Answer

Dashed lines on schematics indicate a mechanical linkage, enclosure boundary, or non-electrical association between components.

Question 2

A blueprint dimension shown as '4'-6"' means the measurement is:

Accepted Answer

4 feet 6 inches

Answer

The foot-inch notation uses an apostrophe for feet and quotation mark for inches, so 4'-6" equals 4 feet and 6 inches.

Question 3

Which view in a set of blueprints shows the building from above looking straight down?

Accepted Answer

Plan view

Answer

A plan view (floor plan) is a horizontal cut through the structure viewed from above, showing layout and dimensions.

Question 4

On a piping and instrumentation diagram (P&ID), what does a circle with a letter-number tag represent?

Accepted Answer

An instrument or control device

Answer

Tagged circles (bubbles) on a P&ID represent instruments such as transmitters, indicators, controllers, or recorders.

Question 5

When a blueprint note reads 'NTS,' it means:

Accepted Answer

Not to scale

Answer

NTS stands for 'Not to Scale,' warning the reader that the drawing dimensions should not be measured directly from the printed image.

(CPI) Certified Professional Installer Practice Test