Journeyman Electrician Practice Test
A 440 volts motor has a full load current of 34 amperes. what size disconnecting means is required? - Correct Answer
40 amperes
The rating of disconnecting means is 115% of full load current.34 * 1.15 = 39.1 amperes.The nearer rating is 40
amperes.
A continuous load is load where the maximum current is expected to continue for ............ hours or more. - Correct
Answer 3
According to the NEC, fixed outdoor deicing and snow melting equipment is to be considered as a _____ load. -
Correct Answer Continuous
a continuous load is a load expected to continue for three (3) hours or more.The installation requirements for fixed
outdoor electric deicing and snow melting equipment, fixed outdoor electric deicing and snow melting equipment shall
be considered a continuous load.When sizing conductors and overcurrent protection for the fixed outdoor equipment
you must take into consideration the equipment can operate over 3 hours, so it is considered a continuous load.
All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall always require
........................................... - Correct Answer Ground fault circuit interceptor
Conductors with _____ marked on the insulation are NOT approved for use in a wet location. - Correct Answer THHN
conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN,
THHW, and THW insulation are recognized for use in dry and wet locations.
Flexible cards may not be used in the following locations .......... - Correct Answer To replace a fixed wiring of a
structure
For a 300 ampere electrical circuit, what is the minimum size copper equipment grounding conductor as per NEC? -
Correct Answer 4 awg
4 AWG is the minimum size wire for a 300 ampere circuit
For a building or structure where the meter enclosure is adjacent to the service disconnecting means, it is permitted
to ground the meter enclosure to the _____ conductor on the load side of the service disconnect if ground-fault
protection is not provided. - Correct Answer Grounded
The meter enclosure to be grounded by connection on the load side of the service disconnect where (1) no ground-
fault protection is installed, (2) the meter enclosure is adjacent to the service disconnecting means, and (3) the
grounded service conductor is not smaller than the size specified
For dwelling units, GFCI protection is required for all single-phase, 125-volt, 15- and 20-ampere receptacles installed
within six (6) feet of the top inside edge of the bowl of sinks located in _____.
a. laundry rooms
b. bathrooms
c. garages
d. all of these areas - Correct Answer All of these areas
no matter what the location or room in a dwelling, where the 15- or 20-ampere, 125-volt eceptacles are installed
within six (6) feet from the top inside edge of the bowl of the sink, GFCI protection must be provided to prevent a
ground-fault shock hazard.
For stationary small motors rated less than .................., the branch circuit over current device may serve as a
controller. - Correct Answer 1/ 8 horse power
, Generally, in a movie theater the manual switch for controlling the emergency lighting systems is permitted to be
located _____. - Correct Answer in an accessible location in the lobby
apply buildings used as a theater or for a similar purpose. Section 520.8 mandates the control of emergency systems
in theaters to comply with the rules set forth in Article 700; Part V of Article 700 applies to the control of emergency
lighting circuits. Section 700.21 does not permit a manual control switch for emergency lighting to be placed in a
motion picture projection booth or on a stage or platform; the switch shall be located in the lobby or at a convenient
accessible location.Emergency lighting systems are designed and installed to maintain a specific degree of
illumination for means of egress of the building in the event of fire, or similar emergency, or if the normal power
supply fails.
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a 120/240 volt, single-phase,
electrical system from the local utility company. What is the MINIMUM size aluminum THW conductors required for
use as service-entrance conductors for this residence? - Correct Answer 4/0 AWG
one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be sized at an ampacity of not less
than 83% of the service rating. Therefore, 200 amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum
conductors with an allowable ampacity of 180 amperes should be selected for this dwelling.
If a 230 volts load is connected to 240 volts power source, what is the minimum voltage that can be supplied to load
as recommended by NEC? - Correct Answer 228 volts
If the panel board rating is 100 amperes, what shall be the over current device rating located in panel board? -
Correct Answer less than 100 amperes
The over current device rating must not be greater than panel board rating in which it is located
If two 4 ohm resistors are connected in series which are powered by 240 volts power source, what is the current flow
across one 4 ohm resistor? - Correct Answer 30 amperes
Total resistance of the circuit = 4 + 4 = 8 ohms
Current flow in the circuit = 240 /8 = 30 amperes
In series circuit flow in the circuit elements is same. so 30 amperes current will flow in both series resistors.
In a dwelling unit where a 125-volt, 15- or 20-ampere receptacle is located under the counter for an in-sink waste
disposer, the receptacle must be provided with _____.
a. AFCI protection only
b. GFCI protection only
c. both AFCI and GFCI protection
d. neither AFCI nor GFCI protection - Correct Answer Both AFCI and GFCI protection
Because of the presence of water and grounded surfaces that contributes to a potential shock hazard
any 125-volt, 15- or 20-ampere receptacle installed within six (6) feet of a sink is required to be GFCI protected.
Section 210.12(A) verifies AFCI protection is required for all 120-volt, 15- or 20-ampere branch-circuits that supply
outlets in kitchens in dwellings.AFCI devices are designed to determine resistance to unwanted tripping due to the
presence of arcing that occurs in utilization equipment under normal operating conditions or to a loading condition
that closely mimics an arcing fault.
In a metal wire-ways, the distance between supports shall not exceed .............. ft. - Correct Answer 10
In compliance with the NEC, the total marked rating of a 120-volt, cord-and-plug-connected room air conditioner shall
not exceed _____ of the rating of a branch circuit when lighting units, general-use receptacles, or other appliances
are supplied from the branch circuit. - Correct Answer 50%
the special provisions for room air conditioners which are (1) rated not over 250-volts ac, single-phase and (2) which
are cord-and-attachment plug connected. In order to prevent overloading the branch circuit, as per Section 40.62(C),
the total rating of the A/C unit shall not exceed 50% of the rating of a branch circuit where lighting units, general-use
receptacles or appliances are also supplied.
A 440 volts motor has a full load current of 34 amperes. what size disconnecting means is required? - Correct Answer
40 amperes
The rating of disconnecting means is 115% of full load current.34 * 1.15 = 39.1 amperes.The nearer rating is 40
amperes.
A continuous load is load where the maximum current is expected to continue for ............ hours or more. - Correct
Answer 3
According to the NEC, fixed outdoor deicing and snow melting equipment is to be considered as a _____ load. -
Correct Answer Continuous
a continuous load is a load expected to continue for three (3) hours or more.The installation requirements for fixed
outdoor electric deicing and snow melting equipment, fixed outdoor electric deicing and snow melting equipment shall
be considered a continuous load.When sizing conductors and overcurrent protection for the fixed outdoor equipment
you must take into consideration the equipment can operate over 3 hours, so it is considered a continuous load.
All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall always require
........................................... - Correct Answer Ground fault circuit interceptor
Conductors with _____ marked on the insulation are NOT approved for use in a wet location. - Correct Answer THHN
conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN,
THHW, and THW insulation are recognized for use in dry and wet locations.
Flexible cards may not be used in the following locations .......... - Correct Answer To replace a fixed wiring of a
structure
For a 300 ampere electrical circuit, what is the minimum size copper equipment grounding conductor as per NEC? -
Correct Answer 4 awg
4 AWG is the minimum size wire for a 300 ampere circuit
For a building or structure where the meter enclosure is adjacent to the service disconnecting means, it is permitted
to ground the meter enclosure to the _____ conductor on the load side of the service disconnect if ground-fault
protection is not provided. - Correct Answer Grounded
The meter enclosure to be grounded by connection on the load side of the service disconnect where (1) no ground-
fault protection is installed, (2) the meter enclosure is adjacent to the service disconnecting means, and (3) the
grounded service conductor is not smaller than the size specified
For dwelling units, GFCI protection is required for all single-phase, 125-volt, 15- and 20-ampere receptacles installed
within six (6) feet of the top inside edge of the bowl of sinks located in _____.
a. laundry rooms
b. bathrooms
c. garages
d. all of these areas - Correct Answer All of these areas
no matter what the location or room in a dwelling, where the 15- or 20-ampere, 125-volt eceptacles are installed
within six (6) feet from the top inside edge of the bowl of the sink, GFCI protection must be provided to prevent a
ground-fault shock hazard.
For stationary small motors rated less than .................., the branch circuit over current device may serve as a
controller. - Correct Answer 1/ 8 horse power
, Generally, in a movie theater the manual switch for controlling the emergency lighting systems is permitted to be
located _____. - Correct Answer in an accessible location in the lobby
apply buildings used as a theater or for a similar purpose. Section 520.8 mandates the control of emergency systems
in theaters to comply with the rules set forth in Article 700; Part V of Article 700 applies to the control of emergency
lighting circuits. Section 700.21 does not permit a manual control switch for emergency lighting to be placed in a
motion picture projection booth or on a stage or platform; the switch shall be located in the lobby or at a convenient
accessible location.Emergency lighting systems are designed and installed to maintain a specific degree of
illumination for means of egress of the building in the event of fire, or similar emergency, or if the normal power
supply fails.
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a 120/240 volt, single-phase,
electrical system from the local utility company. What is the MINIMUM size aluminum THW conductors required for
use as service-entrance conductors for this residence? - Correct Answer 4/0 AWG
one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be sized at an ampacity of not less
than 83% of the service rating. Therefore, 200 amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum
conductors with an allowable ampacity of 180 amperes should be selected for this dwelling.
If a 230 volts load is connected to 240 volts power source, what is the minimum voltage that can be supplied to load
as recommended by NEC? - Correct Answer 228 volts
If the panel board rating is 100 amperes, what shall be the over current device rating located in panel board? -
Correct Answer less than 100 amperes
The over current device rating must not be greater than panel board rating in which it is located
If two 4 ohm resistors are connected in series which are powered by 240 volts power source, what is the current flow
across one 4 ohm resistor? - Correct Answer 30 amperes
Total resistance of the circuit = 4 + 4 = 8 ohms
Current flow in the circuit = 240 /8 = 30 amperes
In series circuit flow in the circuit elements is same. so 30 amperes current will flow in both series resistors.
In a dwelling unit where a 125-volt, 15- or 20-ampere receptacle is located under the counter for an in-sink waste
disposer, the receptacle must be provided with _____.
a. AFCI protection only
b. GFCI protection only
c. both AFCI and GFCI protection
d. neither AFCI nor GFCI protection - Correct Answer Both AFCI and GFCI protection
Because of the presence of water and grounded surfaces that contributes to a potential shock hazard
any 125-volt, 15- or 20-ampere receptacle installed within six (6) feet of a sink is required to be GFCI protected.
Section 210.12(A) verifies AFCI protection is required for all 120-volt, 15- or 20-ampere branch-circuits that supply
outlets in kitchens in dwellings.AFCI devices are designed to determine resistance to unwanted tripping due to the
presence of arcing that occurs in utilization equipment under normal operating conditions or to a loading condition
that closely mimics an arcing fault.
In a metal wire-ways, the distance between supports shall not exceed .............. ft. - Correct Answer 10
In compliance with the NEC, the total marked rating of a 120-volt, cord-and-plug-connected room air conditioner shall
not exceed _____ of the rating of a branch circuit when lighting units, general-use receptacles, or other appliances
are supplied from the branch circuit. - Correct Answer 50%
the special provisions for room air conditioners which are (1) rated not over 250-volts ac, single-phase and (2) which
are cord-and-attachment plug connected. In order to prevent overloading the branch circuit, as per Section 40.62(C),
the total rating of the A/C unit shall not exceed 50% of the rating of a branch circuit where lighting units, general-use
receptacles or appliances are also supplied.
