FACP Power Supply & Battery Systems 2

Question 1

For a non-sprinklered building, what is the minimum secondary (standby) power duration required by NFPA 72?

Accepted Answer

60 hours

Answer

12 hours

Answer

24 hours

Answer

48 hours

Question 2

What happens to an FACP when AC primary power is lost?

Accepted Answer

The panel automatically switches to secondary battery power and generates a trouble signal

Answer

The panel shuts down immediately

Answer

The panel activates all notification appliances

Answer

The panel enters a diagnostic test mode

Question 3

What is 'float charging' in the context of FACP battery systems?

Accepted Answer

A continuous low-level charge that maintains fully charged batteries while compensating for self-discharge

Answer

Charging batteries to 100% then disconnecting the charger

Answer

Rapidly charging a depleted battery to full capacity

Answer

Periodically testing battery capacity at set intervals

Question 4

When calculating battery size for an FACP, how is the alarm load component determined?

Accepted Answer

Alarm current multiplied by alarm duration converted to hours

Answer

Standby current multiplied by standby hours

Answer

Peak current multiplied by 24 hours

Answer

Total ampere-hours multiplied by 0.80

Question 5

Which condition requires FACP battery replacement per NFPA 72?

Accepted Answer

Battery capacity falls below 80% of its rated ampere-hour value

Answer

Battery terminal voltage drops below 14.4 V during normal standby

Answer

Battery temperature exceeds 77°F (25°C) during operation

Answer

Battery has been installed for more than 3 years

Question 6

What is the purpose of a battery supervision circuit in an FACP?

Accepted Answer

To detect an open circuit or disconnection of the battery and generate a trouble signal

Answer

To display the battery charge percentage on the annunciator

Answer

To automatically limit the charge current to safe levels

Answer

To perform automatic periodic capacity tests

Question 7

What is the typical regulated DC output voltage of an FACP power supply used to power field devices?

Accepted Answer

24 VDC

Answer

12 VDC

Answer

48 VDC

Answer

120 VDC