NM ES3J QUESTIONS &
ANSWERS(RATED A+)
NFPA 72 - ANSWERWhat is the NFPA code that refers to household firefighting
equipment?
22 (NEC 725.179 E) - ANSWERType PLTC nonmetallic sheathed shall be a minimum
size ___ gauge for class 3 circuits and have an insulation rating of atleast 300 V
Grounding Connection - ANSWERWhat is the function of a green wire in a
manufactured home?
2 Feet - ANSWERWhat is the minimum required clearance between a receiving
antenna and 250 volt line not insulated?
20 - ANSWERWhat is the maximum number of supervisory switches permitted to be
connected to a actuate a single transmitter?
18 (NEC 725.179 H) - ANSWERAccording to NEC class 3 circuits are allowed a
minimum wire size of what gauge?
8 Feet
NEC 250.5.2.5 - ANSWERWhat is the minimum length of a grounding rod in an
application of less than 50 volts?
Wooden plugs - ANSWERAccording to the NEC electrical equipment may not be
mounted to concrete, cinder block, or brick walls with one of these___.
300
(NEC 800.179) - ANSWERCommunication cables shall have a voltage rating of not less
than how many volts?
Connected
(NEC 550.16) - ANSWERIn a manufactured home the grounding bus shall be ___
through the green color insulated conductor in the supply cord or the feeder wiring to
the service ground in the service equipment located adjacent to the mobile home.
2
(NFPA 72 18.5.2.1) - ANSWERwhat is the maximum blink rate on a strobe light per
second?
10 foot gas pipe
(NEC 250.5.2 A) - ANSWERAll of the following is acceptable as a ground except?
, 1 1/4 inches
(NEC 300.4 A 1) - ANSWERWhat is the minimum clearance to the edge of a wood stud
for a wire hole?
2 Feet
(NEC 810.13) - ANSWERThe minimum clearance for an antenna to other conductors
is?
2 - ANSWERA basic alarm system will have __ power sources
60 Volts
(NEC 820.15) - ANSWERWhat is the maximum voltage that coax cable can carry?
50 Feet (NFPA 72 29.7.3.1) - ANSWERHeat detectors used within a family unit must be
listed as or approved for not less than ___ spacing?
3 hours - ANSWERThe NEC classifies Continuous Load as equipment running at a
maximum load of __ ____?
Class ll Division 1
(NEC 500.5 C1) - ANSWERDetermine the class and division for which location in which
sufficient quantities of combustible dust are normally present in the air to produce
explosive mixtures.
On the centerline of a doorway - ANSWERGiven: a smoke detection system is being
installed to automatically close a double doorway in response to smoke blowing in either
direction, the ceiling is smooth. Where must the smoke detector be installed?
Bottom of the beam - ANSWEROn a beam ceiling where the beams are less than 12
inches in depth and spacing is less than 96 inches where should the smoke detectors
be mounted?
Safe Electrical Installation - ANSWERThe purpose of NEC is to provide?
Boxes or Junction Boxes - ANSWERWhere are splices allowed in conductors in surface
metal raceways if they do not have removable covers?
UF (NEC 340.10) - ANSWERWhat type of wire is used for common direct burial?
2
NFPA 72 24.4.1.2.1 - ANSWEROn a voice alarm system what is the minimum number
of cycles it has to report an evacuation procedure?
Heat Detector - ANSWERWhat is the detector that is mounted on the ceiling or wall that
reacts to convected thermal reaction?
ANSWERS(RATED A+)
NFPA 72 - ANSWERWhat is the NFPA code that refers to household firefighting
equipment?
22 (NEC 725.179 E) - ANSWERType PLTC nonmetallic sheathed shall be a minimum
size ___ gauge for class 3 circuits and have an insulation rating of atleast 300 V
Grounding Connection - ANSWERWhat is the function of a green wire in a
manufactured home?
2 Feet - ANSWERWhat is the minimum required clearance between a receiving
antenna and 250 volt line not insulated?
20 - ANSWERWhat is the maximum number of supervisory switches permitted to be
connected to a actuate a single transmitter?
18 (NEC 725.179 H) - ANSWERAccording to NEC class 3 circuits are allowed a
minimum wire size of what gauge?
8 Feet
NEC 250.5.2.5 - ANSWERWhat is the minimum length of a grounding rod in an
application of less than 50 volts?
Wooden plugs - ANSWERAccording to the NEC electrical equipment may not be
mounted to concrete, cinder block, or brick walls with one of these___.
300
(NEC 800.179) - ANSWERCommunication cables shall have a voltage rating of not less
than how many volts?
Connected
(NEC 550.16) - ANSWERIn a manufactured home the grounding bus shall be ___
through the green color insulated conductor in the supply cord or the feeder wiring to
the service ground in the service equipment located adjacent to the mobile home.
2
(NFPA 72 18.5.2.1) - ANSWERwhat is the maximum blink rate on a strobe light per
second?
10 foot gas pipe
(NEC 250.5.2 A) - ANSWERAll of the following is acceptable as a ground except?
, 1 1/4 inches
(NEC 300.4 A 1) - ANSWERWhat is the minimum clearance to the edge of a wood stud
for a wire hole?
2 Feet
(NEC 810.13) - ANSWERThe minimum clearance for an antenna to other conductors
is?
2 - ANSWERA basic alarm system will have __ power sources
60 Volts
(NEC 820.15) - ANSWERWhat is the maximum voltage that coax cable can carry?
50 Feet (NFPA 72 29.7.3.1) - ANSWERHeat detectors used within a family unit must be
listed as or approved for not less than ___ spacing?
3 hours - ANSWERThe NEC classifies Continuous Load as equipment running at a
maximum load of __ ____?
Class ll Division 1
(NEC 500.5 C1) - ANSWERDetermine the class and division for which location in which
sufficient quantities of combustible dust are normally present in the air to produce
explosive mixtures.
On the centerline of a doorway - ANSWERGiven: a smoke detection system is being
installed to automatically close a double doorway in response to smoke blowing in either
direction, the ceiling is smooth. Where must the smoke detector be installed?
Bottom of the beam - ANSWEROn a beam ceiling where the beams are less than 12
inches in depth and spacing is less than 96 inches where should the smoke detectors
be mounted?
Safe Electrical Installation - ANSWERThe purpose of NEC is to provide?
Boxes or Junction Boxes - ANSWERWhere are splices allowed in conductors in surface
metal raceways if they do not have removable covers?
UF (NEC 340.10) - ANSWERWhat type of wire is used for common direct burial?
2
NFPA 72 24.4.1.2.1 - ANSWEROn a voice alarm system what is the minimum number
of cycles it has to report an evacuation procedure?
Heat Detector - ANSWERWhat is the detector that is mounted on the ceiling or wall that
reacts to convected thermal reaction?
