F89 Fire Protection Systems 4

Question 1

What is the minimum water supply duration required for a high-rise sprinkler system under NFPA 13?

Accepted Answer

60 minutes

Answer

NFPA 13 requires a minimum water supply duration of 60 minutes for high-rise sprinkler systems.

Question 2

A dry-pipe sprinkler system is most appropriate for which of the following environments?

Accepted Answer

An unheated parking garage in a cold climate

Answer

Dry-pipe systems use pressurized air instead of water, preventing pipe freezing in unheated spaces.

Question 3

Which component in a wet-pipe sprinkler system prevents water from flowing backward into the public water supply?

Accepted Answer

Backflow preventer

Answer

A backflow preventer stops contaminated water from re-entering the potable water supply.

Question 4

In a fire alarm system, what does a 'supervisory signal' indicate?

Accepted Answer

A system component is impaired but no fire exists

Answer

A supervisory signal alerts personnel to an off-normal condition that could affect system performance, such as a closed sprinkler valve.

Question 5

When a sprinkler system control valve is closed for maintenance, the Fire and Life Safety Director must:

Accepted Answer

Implement a fire watch and notify the AHJ and fire department

Answer

Closing a sprinkler control valve impairs fire protection, requiring an immediate fire watch and notification to the AHJ and fire department.

F89 - Fire and Life Safety Director Practice Test