CFPS Detection and Alarm Systems 2

Question 1

Under NFPA 72, which wiring class allows a single open or ground fault to render an entire circuit inoperable?

Accepted Answer

Class B

Answer

Class A

Answer

Class C

Answer

Class X

Question 2

A projected beam smoke detector measures which property to detect smoke?

Accepted Answer

Reduction in infrared light intensity across a path

Answer

Ionization chamber current drop

Answer

Air sample particle count

Answer

Rate of temperature rise

Question 3

NFPA 72 defines the Temporal-3 evacuation signal as:

Accepted Answer

Three short pulses, pause, repeated

Answer

Continuous tone

Answer

Slow whoop pattern

Answer

Three long pulses, pause, repeated

Question 4

Which initiating device would be MOST appropriate to detect a slow smoldering fire in a large warehouse?

Accepted Answer

Air-sampling (aspirating) smoke detector

Answer

Fixed-temperature heat detector

Answer

Rate-of-rise heat detector

Answer

Ultraviolet flame detector

Question 5

What is the purpose of a duct smoke detector installed in an HVAC return-air duct?

Accepted Answer

To prevent smoke from being recirculated through the HVAC system

Answer

To activate the building sprinkler system

Answer

To measure air velocity in the duct

Answer

To notify occupants to evacuate immediately

Question 6

According to NFPA 72, a supervisory signal from a sprinkler control valve indicates:

Accepted Answer

An abnormal condition requiring attention but not immediate evacuation

Answer

A fire condition requiring evacuation

Answer

A trouble condition in the alarm system wiring

Answer

Successful system self-test completion

Question 7

A flame detector that responds to radiant energy in the 4.3-micron CO₂ absorption band is classified as:

Accepted Answer

Infrared (IR) detector

Answer

Ultraviolet (UV) detector

Answer

Near-infrared (NIR) detector

Answer

Multi-spectrum infrared detector