ELECTRICAL POWER TESTING PRACTICE
SOLUTION BANK
◉ When installing a wall-mounted fire telephone appliance to the
public, what is the acceptable maximum mounting height from the floor?
Answer: 66 inches
◉ Elevator lobby smoke detectors shall be mounted within a maximum
of which distance from the center-line of the door? Answer: 21 feet
◉ At minimum, when working near power lines with voltage of 600
volts and lower, an aerial lift operator shall maintain which distance
from the lines? Answer: 10 feet
◉ The use of unprotected EMT shall be permitted under which
conditions? Answer: when in direct contact with the earth
◉ According to NFPA 70, what is the maximum unsupported length of
1/2-inch flexible metallic conduit where flexibility is required after
installation? Answer: 4 1/2 feet
◉ What is the maximum bend (in degrees) permitted in a conduit run
between outlet boxes? Answer: 360 Degrees
, ◉ If the primary power is disconnected and the fire alarm system goes
into an alarm condition, what is the minimum acceptable time for
secondary power to operate the voice evacuation systems? Answer: 15
minutes
◉ A riser room temperature switch should activate when the temperature
falls below which level? Answer: 40 degrees F
◉ According to NFPA 72, what is the maximum sound pressure level
permitted in a space with notification appliances? Answer: 110 dBA
◉ What is the minimum interval for testing a single-station smoke
detector in multifamily units? Answer: Annually
◉ Where should a technician install a detector in relation to beam that is
less than 12 inches deep and less that 8 feet in center? Answer: At the
bottom of the beam
◉ An existing fire alarm cable in a drop ceiling will be spliced. which
one of the following splice locations will comply with NFPA 70?
Answer: secured inside a listed box or enclosure
◉ Which function shall be tested for each newly installed smoke
detector? Answer: smoke entry?