NCCER IRONWORKER EXAM 2026
UPDATE QUESTIONS AND CORRECT
VERIFIED ANSWERS ALREADY
GRADED A+ (BRAND NEW VISION)
When should a de-oxide compound be used? - ANS-During an aluminum-copper
connection
A conduit bending Hickey can be used to bend conduit from? - ANS-0-15 degrees
All of the following information is found on a one-line diagram of a substation EXCEPT?
- ANS-The Scale
What are the 3 elements in every electrical circuit? - ANS-Power source, wire, and
load
What are the 2 most commonly used methods of terminating grounding? - ANS-
Exothermic (caldwelding) and mechanical
Chico sealing compound is to be applied in an EYD fitting, the electrician must make
sure that? - ANS-The drain remains clear
The point of attachment of service drop conductors (must) provide minimum clearance
as specified in what NEC table? - ANS-230-24
The color of the outer finish required to mark a phase busbar or the conductor having
the higher voltage to ground is? - ANS-Orange
How does a battery produce voltage? - ANS-By chemical reaction
Which of the following should be used to cool dry a transformer? - ANS-Fans
What does thermal overload protect in a starter or MCC? - ANS-The Motor
How are the primary leads identified in a transformer? - ANS-H1, H2, H3
,What test equipment can be used to locate a suspected short circuit in one phase of a
3phase motor? - ANS-Megger
Normally you would need all of the following in a wire pull operation EXCEPT? - ANS-
Scaffolding
Which of the following components is part of a DUAL ELEMENT FUSE? - ANS-Time
Delay
A holding contact in a motor starter normally connected in parallel with? - ANS-The
start push button
The potential across the circuit is 480 volts and the current is 50 amps, what is the
resistance of the circuit? - ANS-9.6 ohms
A device labeled CO/ALR can be used with ______ wire. - ANS-Aluminum, copper, or
copper-clad aluminum
Specific data for a hazardous material is found in? - ANS-The MSDS
The type and size of overcurrent protection may be found in the - ANS-Panelboard
schedule
The requirements and proper applications of boxes and fittings can be found in - ANS-
NEC Section 300-15
After a hazard review is completed, ________ determine(s) the classification of a
confined space as a nonpermit or permit-required confined space - ANS-The
supervisor and project/safety managers
When busbars are secured to withstand the torque created by the available amount of
short circuit current, they are said to be? - ANS-Braced
It is not a good idea to use needle-nose pliers to bend wire in preparation for a
termination because? - ANS-Gripping the conductor and bending it with needle-
nose pliers can scar or weaken the conductor
The correct receptacle terminal and wire color code is? - ANS-Green terminal- ground
wire, silver-white conductor, brass-black conductor
A sectional drawing is a? - ANS-Cutaway view of a building or object
When splicing small sizes stranded conductors using crimp-type connectors ______
may be a problem - ANS-Lost strands
, Where several conductors are pulled together, they should be arranged ______ on the
fish tape. - ANS-Staggered
Of the 16 usual divisions found in written specifications, Division_deals mainly with
electrical work. - ANS-16
The NEC states that? - ANS-All disconnect devices for circuits, feeders, and
equipment must be clearly and permanently marked to show their purpose unless
clearly evident
Staggered Utility metering equipment is used to_____ of an electrical service. - ANS-
Measure the power consumption
_____ conduit is too thin to be threaded. - ANS-EMT
Before a splice or connection can be made to a Type THHN conductor, the ______ -
ANS-Conductor ends must be stripped and cleaned
To strip insulation when splicing wire, ______ should be used. - ANS-Wire strippers
The device used to prevent the passage of gases, vapors, and flames through a conduit
is a - ANS-Sealing fitting
Two clevis types are - ANS-Straight and swivel
The voltage drop of conductors carrying alternating current in PVC will be ______ that
of identical conductors in metal conduit. - ANS-Less than
Keyed interlocks (kirklocks) may be? - ANS-Used to control equipment operation
sequences
A(n). ______ operates on the same principle as a current transformer. - ANS-Clamp-on
ammeter
The type of drawing that shows the general arrangement of service entrance equipment
and panelboards, along with the related services and feeder conduit/conductors, is a? -
ANS-Power-riser diagram
The type of fitting used to suspend cables in long vertical runs of cable tray is a? - ANS-
Cable hanger elbow
The least desirable method of exiting cable from a cable tray is? - ANS-From the end
of the tray without a dropout plate
The best device for transporting very large cable reels is a? - ANS-cable reel
transporter
UPDATE QUESTIONS AND CORRECT
VERIFIED ANSWERS ALREADY
GRADED A+ (BRAND NEW VISION)
When should a de-oxide compound be used? - ANS-During an aluminum-copper
connection
A conduit bending Hickey can be used to bend conduit from? - ANS-0-15 degrees
All of the following information is found on a one-line diagram of a substation EXCEPT?
- ANS-The Scale
What are the 3 elements in every electrical circuit? - ANS-Power source, wire, and
load
What are the 2 most commonly used methods of terminating grounding? - ANS-
Exothermic (caldwelding) and mechanical
Chico sealing compound is to be applied in an EYD fitting, the electrician must make
sure that? - ANS-The drain remains clear
The point of attachment of service drop conductors (must) provide minimum clearance
as specified in what NEC table? - ANS-230-24
The color of the outer finish required to mark a phase busbar or the conductor having
the higher voltage to ground is? - ANS-Orange
How does a battery produce voltage? - ANS-By chemical reaction
Which of the following should be used to cool dry a transformer? - ANS-Fans
What does thermal overload protect in a starter or MCC? - ANS-The Motor
How are the primary leads identified in a transformer? - ANS-H1, H2, H3
,What test equipment can be used to locate a suspected short circuit in one phase of a
3phase motor? - ANS-Megger
Normally you would need all of the following in a wire pull operation EXCEPT? - ANS-
Scaffolding
Which of the following components is part of a DUAL ELEMENT FUSE? - ANS-Time
Delay
A holding contact in a motor starter normally connected in parallel with? - ANS-The
start push button
The potential across the circuit is 480 volts and the current is 50 amps, what is the
resistance of the circuit? - ANS-9.6 ohms
A device labeled CO/ALR can be used with ______ wire. - ANS-Aluminum, copper, or
copper-clad aluminum
Specific data for a hazardous material is found in? - ANS-The MSDS
The type and size of overcurrent protection may be found in the - ANS-Panelboard
schedule
The requirements and proper applications of boxes and fittings can be found in - ANS-
NEC Section 300-15
After a hazard review is completed, ________ determine(s) the classification of a
confined space as a nonpermit or permit-required confined space - ANS-The
supervisor and project/safety managers
When busbars are secured to withstand the torque created by the available amount of
short circuit current, they are said to be? - ANS-Braced
It is not a good idea to use needle-nose pliers to bend wire in preparation for a
termination because? - ANS-Gripping the conductor and bending it with needle-
nose pliers can scar or weaken the conductor
The correct receptacle terminal and wire color code is? - ANS-Green terminal- ground
wire, silver-white conductor, brass-black conductor
A sectional drawing is a? - ANS-Cutaway view of a building or object
When splicing small sizes stranded conductors using crimp-type connectors ______
may be a problem - ANS-Lost strands
, Where several conductors are pulled together, they should be arranged ______ on the
fish tape. - ANS-Staggered
Of the 16 usual divisions found in written specifications, Division_deals mainly with
electrical work. - ANS-16
The NEC states that? - ANS-All disconnect devices for circuits, feeders, and
equipment must be clearly and permanently marked to show their purpose unless
clearly evident
Staggered Utility metering equipment is used to_____ of an electrical service. - ANS-
Measure the power consumption
_____ conduit is too thin to be threaded. - ANS-EMT
Before a splice or connection can be made to a Type THHN conductor, the ______ -
ANS-Conductor ends must be stripped and cleaned
To strip insulation when splicing wire, ______ should be used. - ANS-Wire strippers
The device used to prevent the passage of gases, vapors, and flames through a conduit
is a - ANS-Sealing fitting
Two clevis types are - ANS-Straight and swivel
The voltage drop of conductors carrying alternating current in PVC will be ______ that
of identical conductors in metal conduit. - ANS-Less than
Keyed interlocks (kirklocks) may be? - ANS-Used to control equipment operation
sequences
A(n). ______ operates on the same principle as a current transformer. - ANS-Clamp-on
ammeter
The type of drawing that shows the general arrangement of service entrance equipment
and panelboards, along with the related services and feeder conduit/conductors, is a? -
ANS-Power-riser diagram
The type of fitting used to suspend cables in long vertical runs of cable tray is a? - ANS-
Cable hanger elbow
The least desirable method of exiting cable from a cable tray is? - ANS-From the end
of the tray without a dropout plate
The best device for transporting very large cable reels is a? - ANS-cable reel
transporter
