CAT Blueprint Reading & Interpretation 3

Question 1

A blueprint legend shows a half-filled circle symbol. According to NFPA 72 conventions, this typically represents a:

Accepted Answer

Combination smoke/heat detector

Answer

A half-filled circle is commonly used to denote a combination smoke and heat detector on NFPA 72 compliant fire alarm drawings.

Question 2

What is the purpose of a 'detail' drawing referenced on a fire alarm plan?

Accepted Answer

To provide enlarged views of complex or critical installation areas

Answer

Detail drawings zoom in on specific areas to clarify complex installations that cannot be clearly shown at the standard plan scale.

Question 3

On a fire alarm blueprint, a solid triangle symbol pointing upward most commonly represents:

Accepted Answer

A manual pull station

Answer

A solid triangle or arrow-shaped symbol pointing upward is the NFPA 72 standard symbol for a manual pull station.

Question 4

Which document in a set of construction drawings would specify the wire type and insulation rating for fire alarm circuits?

Accepted Answer

Electrical specifications (Division 28)

Answer

Fire alarm wiring specifications, including conductor type and insulation rating, are found in Division 28 (Electronic Safety and Security) of the project specifications.

Question 5

A fire alarm drawing note states 'VFY W/AHJ'. What does this instruction require the technician to do?

Accepted Answer

Verify the requirement with the Authority Having Jurisdiction

Answer

AHJ stands for Authority Having Jurisdiction; this note instructs the installer to confirm the requirement with that governing body before proceeding.

(CAT) Certified Alarm Technician Level I Practice Test

(CAT) Certified Alarm Technician Level I Practice Test

CAT Blueprint Reading & Interpretation 3