S95 - Supervision of Fire Alarm System Inspection and Testing Procedures Questions and Answers 1

Question 1

According to NFPA 72, what is the required initial and subsequent testing frequency for smoke detector sensitivity?

Accepted Answer

Initially within 1 year of installation, then every alternate year. If two consecutive tests are stable, the interval can extend to 5 years.

Answer

NFPA 72 requires smoke detector sensitivity to be tested within one year of installation. After the initial test, it must be tested every other year. However, if two consecutive biennial tests show the detector is within the required sensitivity range, the time between tests can be extended to a maximum of five years.

Question 2

An S-95 Certificate of Fitness holder is supervising a fire alarm system when a single smoke detector is replaced. Which of the following best describes the reacceptance testing required by NFPA 72 for this modification?

Accepted Answer

The new detector, all functions affected by the change, and 10% of unaffected initiating devices (up to 50) must be tested.

Answer

When a change is made to site-specific software, such as adding or replacing an addressable device, NFPA 72 requires more than just testing the new device. It mandates testing all functions known to be affected by the change, plus a functional test of an additional 10 percent of initiating devices not affected by the change, up to a maximum of 50 devices, to verify system stability.

Question 3

During a monthly inspection of a fire alarm system's secondary power supply, what is a key visual check an S-95 holder must perform on the lead-acid batteries?

Accepted Answer

Check for corrosion on terminals and signs of leakage from the battery case.

Answer

Monthly visual inspections of batteries are crucial. The S-95 holder should look for signs of deterioration such as corrosion on the terminals or leakage of battery fluid, as these can impede performance during a power failure.

Question 4

A facility manager schedules an annual fire alarm system test in a fully occupied office building. What is a critical procedural step that must be taken prior to beginning the test?

Accepted Answer

Ensure the fire department is on-site to witness the entire test.

Answer

Before conducting any testing that could result in an alarm transmission, it is essential to notify both the building occupants (to prevent panic) and the central monitoring station (to prevent an unnecessary fire department dispatch). This is a standard and critical part of any fire alarm testing procedure.

Question 5

When performing an acceptance test on a new fire alarm system, what is the NFPA 72 requirement for testing the secondary power supply (batteries)?

Accepted Answer

The primary (AC) power must be disconnected, and the system must be operated under battery power for a specified duration.

Answer

For an acceptance test, NFPA 72 requires disconnecting the primary AC power to verify the system can operate correctly on its secondary power supply. The system is then operated on batteries for a specified duration (e.g., 5 minutes for general alarm, 15 for voice evacuation) to simulate a power outage and ensure the batteries can handle the full system load.

(S95) Supervision of Fire Alarm System Practice Test

(S95) Supervision of Fire Alarm System Practice Test

S95 - Supervision of Fire Alarm System Inspection and Testing Procedures Questions and Answers 1