Questions with Correct
Answers Latest 2024-2025
Update
According to NFPA 72, what is the maximum allowable spacing for a spot-type heat
detector that is listed for 50'ft spacing if it is to be installed on a 25'ft ceiling that is
smooth and flat? - Answer- 23'ft - because detectors at or above 20'ft shall multiply the
listed detector spacing by 0.64.
Under what condition are heat detectors permitted to be installed on the bottom of
beams? - Answer- Where beams are less than 12"inch in depth and less then 8'ft on
center.
PLFA cables shall have a voltage rating of no less than ____ - Answer- 300 volts
An abnormal condition in a system due to a fault is known as a ________. - Answer-
Trouble condition
A horn will be installed in the hallway of a Holiday Inn (hotel). According to NFPA 72,
what is the minimum mounting height above the finished floor? - Answer- 90"inches
The standard evacuation signal shall be synchronized within a _________. - Answer-
Notification zone
Strobe lights are to be installed in a 25'ft wide hallway. According to NFPA 72, what are
the requirements for spacing the strobe lights in the hallway? - Answer- use the spacing
requirements for rooms.
Smoke detectors shall not be installed if ________. - Answer- The temperature is above
100*F
When connected to a supervising station, fire alarm systems installed on the protected
premises employing automatic fire detectors or waterflow detection devices shall
include a (an) _________. - Answer- Manual fire alarm pull box
, Trouble signals and their restoration to normal shall be indicated within ______ at the
fire alarm control panel for protected premises alarm systems. - Answer- 200 seconds
Which of the following is true about a DC circuit?
- Current only flows one way.
-Voltage across each element in the circuit is equal.
-The total current flow of the circuit is equal to the sum of the current flow through each
element.
-current flows in multiple directions - Answer- current only flows in one direction
A circuit contains three resistors in parallel. There values are R1=300, R2=300 and
R3=300. What is the total resistance of the circuit? - Answer- 100 ohms
Ohm's Law is? - Answer- R= E/I or E = I x R or I = V/R. They're interchangeable
Fire alarm cables were installed using RMC. What must be installed/provided when the
conduit is terminated at boxes, fittings and or other enclosures? - Answer- Bushings to
protect the fire alarm cable/conductors regardless of the RMC trade size
NFPLA circuit conductors shall be rated for ___________. - Answer- 600 Volts
Monitoring for integrity shall not be required for the interconnection between enclosures
containing control equipment located within ______ of each other where the conductors
are installed in conduit or equivalently protected against mechanical injury. - Answer-
20'ft
A series circuit has two resistors with values of R1 = 300 ohms and R2 = 200 ohms.
Calculate the total current of the circuit when 24VDC is applied to the circuit. - Answer-
0.048A = (I=V/R)
The fire alarm service provider shall report to the AHJ any fire alarm system that is out
of service for more than _____. - Answer- 8 hours
PLFA cables shall be permitted to be installed together with Class 1, NPLFA, and
medium-power network-powered broadband communications circuits where
__________. - Answer- the cables are seperated by a barrier
What is the value of a resistor with the following color bands: yellow, violet, red, gold? -
Answer- 4,700 ohms