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NICET Inspection and Testing of Fire Alarm Systems Level I Exam Sample Questions (Q86-Q91):
NEW QUESTION # 86
At which interval do duct smoke detectors utilized for HVAC shutdown need to be tested?
- A. Semiannually
- B. Quarterly
- C. Monthly
- D. Annually
Answer: D
Explanation:
Duct detectors are used to shut down air handling systems to prevent smoke from circulating. NFPA 72 requires that these detectors and their shutdown functions be testedannually.
NFPA 72 (2022), Table 14.4.3.2 - Testing Frequencies:
"Duct-type smoke detectors with HVAC shutdown" # Frequency: Annually.
The test must verifydetector functionandHVAC control activation.
Correct answer: D. Annually
NEW QUESTION # 87
According to NFPA 72, in addition to the type of equipment, which additional factor should be considered when determining the frequency of cleaning system equipment?
- A. Local ambient conditions
- B. Number of devices per loop
- C. Frequency of periodic testing
- D. Age of the equipment
Answer: A
Explanation:
The need toclean devicessuch as detectors is influenced by theenvironment they are installed in, not just their type or age. Dusty, smoky, or humid environments will require more frequent cleaning.
NFPA 72 (2022), Section 14.4.1.3:
"The frequency of cleaning shall be determined by the manufacturer's instructions and the local ambient conditions." Correct answer: C. Local ambient conditions
NEW QUESTION # 88
In the event of power loss, how long shall a secondary power source for household fire alarm systems maintain operation?
- A. 24 hours in the normal condition followed by 9 minutes of alarm
- B. 24 hours in the normal condition followed by 60 minutes of alarm
- C. 24 hours in the normal condition followed by 10 minutes of alarm
- D. 24 hours in the normal condition followed by 4 minutes of alarm
Answer: C
Explanation:
Household fire alarm systems have different performance requirements from commercial systems, but still must support essential alarm functions under loss of primary power.
NFPA 72 (2022), Section 29.10.5.1.1:
"The secondary power supply shall be capable of powering the system under quiescent load for 24 hours and then capable of operating the system during alarm for a period of 4 minutes (for general fire alarm) or 10 minutes (for household fire alarm systems)." Correct answer: C. 24 hours in the normal condition followed by 10 minutes of alarm
NEW QUESTION # 89
When is a shunt trip operated to power down an elevator?
- A. When a sprinkler head is activated
- B. When a smoke detector is tripped
- C. When a pull station is activated
- D. When a heat detector is tripped
Answer: A
Explanation:
Elevators must beshut downwhen there iswater dischargein the hoistway to prevent electrical hazards and damage. This shutdown is done using ashunt trip breaker.
NFPA 72 (2022), Section 21.4.2:
"Where sprinklers are located in the elevator machine room, control space, or hoistway, means shall be provided to automatically disconnect the main power supply to the elevator prior to the application of water." This is triggeredby a waterflow switch or heat detector, but the standard design uses thesprinkler head activationas the point of shutdown via heat detector.
Important: While the heat detector usually triggers the shunt trip, thesprinkler head activationis the condition being detected.
Correct answer: D. When a sprinkler head is activated
NEW QUESTION # 90
Which of the following options is required while conducting annual testing of an audiovisual device?
- A. Confirm sound level based on design
- B. Verify proper setting of candela rating
- C. Confirm voice intelligibility
- D. Verify proper operation
Answer: D
Explanation:
When performingannual testingof notification appliances such as strobes or horns, NFPA 72 mandates functional testing- which means checking that they operate correctly when activated.
NFPA 72 (2022), Table 14.4.3.2 - Testing Frequencies and Methods:
Under "Notification Appliances," the required method for both audible and visible devices is:
"Functional test - verify proper operation."
While things likesound levelsandcandela settingsare verified duringacceptance testing or design review, the annual requirement issimply to verify that they work.
Correct answer: C. Verify proper operation
NEW QUESTION # 91
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