QUESTIONS AND VERIFIED 100% CORRECT
ANSWERS GRADED A+
◉ Annually. Answer: What is the testing frequency of a strobe?
◉ 15. Answer: In a corridor application, visible appliances shall be rated
not less than ________ cd?
◉ 4 hours. Answer: Consider a household fire alarm system where the
primary power is provided by a circuit that can be switched off by means
other than a circuit breaker. The battery must be recharged
in____________
◉ The control unit shall identify the affected detector when the
compensation limit has been reached.. Answer: Where automatic drift
compensation of detectors is provided:
◉ 3. Answer: A fire alarm system requires the use of smoke detectors in
a corridor. The corridor is 10' wide and 120' long. The ceiling of the
corridor is smooth and flat and 10' high. What is the minimum number
of smoke detectors in the corridor.
◉ One half smooth ceiling
, NFPA 72 17.7.3.2.4.2(2)bi pg 98. Answer: The fire alarm system design
for a room called for smoke detector spacing based on a smooth flat
ceiling. Upon inspecting the room, it is determined that the ceiling has
beams. The beam spacing is less than 40% of the ceiling height.
NFPA72 permits smooth ceiling spacing in the direction parallel to the
beams and __________ spacing in the direction perpendicular to the
beams.
◉ 3. Answer: The working drawings for a fire alarm system show that 2
duct detectors are required. The building is a single story with 4 HVAC
units (1-5,000 cfm, 1-4000 cfm, 1-3000 cfm, 1-2000 cfm) How many
duct detectors are required?
◉ 15
NFPA72 18.4.3.1 pg107. Answer: The fire alarm system for a building
requires the use of audible notification appliances for public mode
notification. To ensure public mode signals are clearly heard, they shall
have a sound level of at least _______ db above the average ambient
sound level?
◉ Location of utilities. Answer: Site plans typically include:
◉ Level. Answer: A ceiling surface has a slope of 1 in 9. This is
considered a ____________ ceiling.