NM ES3J - Detailed Questions With Smart Solutions
What is the NFPA code that refers to household firefighting equipment?
Correct Ans - NFPA 72
Type PLTC nonmetallic sheathed shall be a minimum size ___ gauge for class 3
circuits and have an insulation rating of atleast 300 V Correct Ans - 22
(NEC 725.179 E)
What is the function of a green wire in a manufactured home? Correct Ans -
Grounding Connection
What is the minimum required clearance between a receiving antenna and
250 volt line not insulated? Correct Ans - 2 Feet
What is the maximum number of supervisory switches permitted to be
connected to a actuate a single transmitter? Correct Ans - 20
According to NEC class 3 circuits are allowed a minimum wire size of what
gauge? Correct Ans - 18 (NEC 725.179 H)
What is the minimum length of a grounding rod in an application of less than
50 volts? Correct Ans - 8 Feet
NEC 250.5.2.5
According to the NEC electrical equipment may not be mounted to concrete,
cinder block, or brick walls with one of these___. Correct Ans - Wooden
plugs
Communication cables shall have a voltage rating of not less than how many
volts? Correct Ans - 300
(NEC 800.179)
In 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.
Correct Ans - Connected
(NEC 550.16)
, what is the maximum blink rate on a strobe light per second? Correct Ans -
2
(NFPA 72 18.5.2.1)
All of the following is acceptable as a ground except? Correct Ans - 10 foot
gas pipe
(NEC 250.5.2 A)
What is the minimum clearance to the edge of a wood stud for a wire hole?
Correct Ans - 1 1/4 inches
(NEC 300.4 A 1)
The minimum clearance for an antenna to other conductors is? Correct Ans
- 2 Feet
(NEC 810.13)
A basic alarm system will have __ power sources Correct Ans - 2
What is the maximum voltage that coax cable can carry? Correct Ans - 60
Volts
(NEC 820.15)
Heat detectors used within a family unit must be listed as or approved for not
less than ___ spacing? Correct Ans - 50 Feet (NFPA 72 29.7.3.1)
The NEC classifies Continuous Load as equipment running at a maximum load
of __ ____? Correct Ans - 3 hours
Determine the class and division for which location in which sufficient
quantities of combustible dust are normally present in the air to produce
explosive mixtures. Correct Ans - Class ll Division 1
(NEC 500.5 C1)
Given: 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? Correct Ans - On
the centerline of a doorway
What is the NFPA code that refers to household firefighting equipment?
Correct Ans - NFPA 72
Type PLTC nonmetallic sheathed shall be a minimum size ___ gauge for class 3
circuits and have an insulation rating of atleast 300 V Correct Ans - 22
(NEC 725.179 E)
What is the function of a green wire in a manufactured home? Correct Ans -
Grounding Connection
What is the minimum required clearance between a receiving antenna and
250 volt line not insulated? Correct Ans - 2 Feet
What is the maximum number of supervisory switches permitted to be
connected to a actuate a single transmitter? Correct Ans - 20
According to NEC class 3 circuits are allowed a minimum wire size of what
gauge? Correct Ans - 18 (NEC 725.179 H)
What is the minimum length of a grounding rod in an application of less than
50 volts? Correct Ans - 8 Feet
NEC 250.5.2.5
According to the NEC electrical equipment may not be mounted to concrete,
cinder block, or brick walls with one of these___. Correct Ans - Wooden
plugs
Communication cables shall have a voltage rating of not less than how many
volts? Correct Ans - 300
(NEC 800.179)
In 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.
Correct Ans - Connected
(NEC 550.16)
, what is the maximum blink rate on a strobe light per second? Correct Ans -
2
(NFPA 72 18.5.2.1)
All of the following is acceptable as a ground except? Correct Ans - 10 foot
gas pipe
(NEC 250.5.2 A)
What is the minimum clearance to the edge of a wood stud for a wire hole?
Correct Ans - 1 1/4 inches
(NEC 300.4 A 1)
The minimum clearance for an antenna to other conductors is? Correct Ans
- 2 Feet
(NEC 810.13)
A basic alarm system will have __ power sources Correct Ans - 2
What is the maximum voltage that coax cable can carry? Correct Ans - 60
Volts
(NEC 820.15)
Heat detectors used within a family unit must be listed as or approved for not
less than ___ spacing? Correct Ans - 50 Feet (NFPA 72 29.7.3.1)
The NEC classifies Continuous Load as equipment running at a maximum load
of __ ____? Correct Ans - 3 hours
Determine the class and division for which location in which sufficient
quantities of combustible dust are normally present in the air to produce
explosive mixtures. Correct Ans - Class ll Division 1
(NEC 500.5 C1)
Given: 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? Correct Ans - On
the centerline of a doorway
