PAPER ELECTRICAL POWER TESTING SOLVED
QUESTIONS
◉ If combination audible/visible appliances are installed the location of
the installed appliance shall be determined by the requirements of
_______.
(Nfpa 72 18.4.8.1) Answer: the visible appliance
◉ What is the maximum number of 12 gauge THHN wires that can be
installed in 1" EMT?
(Nec Annex C tables) Answer: 26
◉ Two resistors are connected in parallel. R1 = 300 Ohms, R2 = 300
Ohms. What is their equivalent resistance? Answer: 150 ohms
◉ A Room is 200' long and 150' wide and the 8' high ceiling is smooth
and flat. A spot type heat detector has been selected that is listed for a 50'
maximum spacing between detectors. According to NFPA 72 how many
detectors will be needed to protect this room?
x = Answer: 12
,◉ According to NFPA 72 the minimum number of restorable fixed
temperature spot type heat detectors that must be tested during each
annual test is?
(NFPA 72 14.4.4.5.1) Answer: Two detectors or more on each initiating
device circuit
◉ According to NFPA 72 how many spot type heat detectors are
required for a space that is 80' long and 55 floor wide with a smooth 10'
ceiling? the detector is listed for a maximum space between detectors of
30' Answer: 6
◉ What color code requirement for a spot type heat detector rated at 200
゚F Answer: White (NFPA 72, Table 17.6.2.1)
◉ Unless otherwise recommended by the manufacturers published
instructions single and multiple stations smoke alarms installed in one
and 2 family dwellings shall be replaced every Answer: 10 years from
the day-of manufacture. (NFPA 72, 14.4.7.1)
◉ Fire alarm cables are permitted to be strapped to conduit to support
the cable Answer: False (NEC 760.143)
, ◉ Where non power limited wiring is installed exposed it must be
mechanically protected within_____of the finished floor Answer: 7' ft
◉ Fire-Warning equipment to be installed in residential occupancies
shall produce the audible emergency evacuation signal described in
Answer: ANSI S3.41
◉ According to NFPA 72, visible notification appliance for non-sleeping
areas must be mounted between ___ and ___ inches above the finished
floor Answer: 80 & 96
◉ If system impairment occurs, the owner must be notified ___ within
___ Answer: in writing & within 24 hours
◉ A 20 X 20' ft room with a 20'ft high ceiling requires at a minimum a
___ ceiling mounted strobe Answer: 30 candela
◉ According to NFPA 72, a 40 x 40'ft room or area with a 10'ft ceiling is
best covered by a ___ cd visible notification appliance, centered on one
wall. Answer: 60
◉ Conductors returning to the fire alarm control panel (FACP) from the
last field device on the circuit might indicate a _____ circuit Answer:
Class A