Examination Questions And Correct
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Question 1
A fire alarm control panel (FACP) in a high-rise office building must be monitored
by a supervising station. According to NFPA 72, what is the maximum allowable
transmission time for a fire alarm signal from the FACP to the supervising station?
A. 10 seconds
B. 30 seconds
C. 60 seconds
D. 90 seconds
Answer: B. 30 seconds. NFPA 72, Section 26.6.3.3.1 requires that fire alarm
signals be transmitted to the supervising station within 30 seconds of activation
at the FACP. This ensures rapid notification of emergency personnel. Options A,
C, and D are incorrect because they do not align with the specific time
requirement; 10 seconds is too short for most digital communicators, while 60
and 90 seconds exceed the permissible delay.
Question 2
Which class of wiring, as defined by NFPA 72, provides the highest level of
survivability during a fire event?
A. Class A
B. Class B
,C. Class C
D. Class X
Answer: D. Class X. NFPA 72 defines Class X as the highest survivability pathway,
featuring redundant paths and isolation modules that allow the system to
continue operating even with multiple faults, including open and short circuits.
Class A provides redundancy for opens but not shorts; Class B offers no fault
tolerance; Class C is not a recognized NFPA 72 class for fire alarm circuits.
Question 3
A contractor installs a smoke detector in a corridor with a ceiling height of 15 feet.
According to NFPA 72, what is the maximum spacing between smoke detectors in
this corridor?
A. 30 feet
B. 41 feet
C. 50 feet
D. 60 feet
Answer: B. 41 feet. NFPA 72, Table 17.2.3.1.1, provides a nominal spacing of 30
feet for smooth ceilings, but for corridors, detectors can be spaced up to 41 feet
apart when ceiling height is under 30 feet, provided the corridor width does not
exceed 30 feet. Option A (30 feet) is for open areas, not corridors; C and D exceed
the corridor spacing limits.
Question 4
What is the minimum sound pressure level (SPL) required for audible notification
appliances in a sleeping area, measured at the pillow?
A. 65 dBA
B. 70 dBA
C. 75 dBA
D. 85 dBA
,Answer: C. 75 dBA. NFPA 72, Section 18.4.3.1, mandates that audible appliances
in sleeping areas produce a minimum of 75 dBA at the pillow, with a sound level
at least 15 dBA above ambient noise. Option A (65 dBA) applies to general
occupancy areas; B (70 dBA) is insufficient; D (85 dBA) is excessive and not
required by code.
Question 5
Which type of detector is most suitable for a dusty warehouse environment where
false alarms from airborne particulates are a concern?
A. Ionization smoke detector
B. Photoelectric smoke detector
C. Heat detector
D. Air-sampling smoke detector
Answer: C. Heat detector. Heat detectors are less susceptible to false alarms
from dust and particulates because they respond to temperature changes rather
than smoke particles. Ionization and photoelectric detectors are prone to
nuisance alarms in dusty conditions; air-sampling detectors are even more
sensitive and would be unsuitable.
Question 6
In a fire alarm system, what is the primary function of an end-of-line resistor
(EOLR)?
A. To limit current to the notification appliances
B. To provide supervision of the initiating device circuit
C. To step down voltage for the control panel
D. To store energy for auxiliary functions
Answer: B. To provide supervision of the initiating device circuit. The EOLR
allows the FACP to monitor circuit integrity by sensing a small current; if the
resistor is removed or the circuit opens, the panel triggers a trouble signal. It
, does not limit current for appliances (A), step down voltage (C), or store energy
(D).
Question 7
According to the International Building Code (IBC), which occupancy type requires
a fire alarm system with voice alarm communication?
A. Group B (Business)
B. Group E (Educational) with more than 100 occupants
C. Group F (Factory)
D. Group S (Storage)
Answer: B. Group E (Educational) with more than 100 occupants. IBC Section
907.5.2.3.1 requires voice alarm systems in Group E occupancies with occupant
loads exceeding 100. Group B generally does not require voice alarm unless
other conditions apply; Groups F and S typically have less stringent
requirements.
Question 8
A pull station must be mounted at what height above the finished floor, per NFPA
72?
A. 42 to 48 inches
B. 48 to 54 inches
C. 42 to 54 inches
D. 48 to 60 inches
Answer: A. 42 to 48 inches. NFPA 72, Section 17.14.5, specifies that manual fire
alarm boxes shall be located within 42 to 48 inches (1.07 to 1.22 m) above the
floor, measured to the operating handle. Option B is too high; C and D are
incorrect ranges.