CAT Blueprint Reading & Interpretation 2

Question 1

On a fire alarm blueprint, what does a dashed line typically represent?

Accepted Answer

A concealed or hidden conduit run

Answer

Dashed lines on electrical/fire alarm blueprints indicate wiring or conduit that runs concealed inside walls, ceilings, or floors.

Question 2

Which drawing type shows a cross-sectional view of a wall or floor assembly as if it were cut through?

Accepted Answer

Section view

Answer

A section view (or sectional drawing) cuts through the structure to reveal interior construction details and assembly layers.

Question 3

What does the abbreviation 'AFF' mean on a fire alarm installation drawing?

Accepted Answer

Above Finished Floor

Answer

AFF stands for Above Finished Floor and indicates the mounting height of a device measured from the completed floor surface.

Question 4

A fire alarm blueprint shows a symbol with a circle containing the letter 'S'. What does this most likely represent?

Accepted Answer

Smoke detector

Answer

A circle with 'S' is the standard NFPA 72 symbol for a smoke detector on fire alarm drawings.

Question 5

On a reflected ceiling plan (RCP), what does the drawing represent?

Accepted Answer

The ceiling as if a mirror were placed on the floor looking up

Answer

An RCP shows the ceiling layout as if you placed a mirror on the floor—you see the ceiling above you but oriented as a plan view.

(CAT) Certified Alarm Technician Level I Practice Test