NCCER Ironworker Final Exam Questions/Answer Graded A+
2025/2026
A condition in which the flame burns inside the tip, torch or hose is known as a -
flashback
acetylene cylinder valves should be opened only approximately one to one-and-a-half
turns to - provide quick closure in case of an emergency
most oxygen and fuel gas regulators have gauges that measure actual pressure in the
cylinder and - pressure at the torch
while oxygen cylinder pressure may be as high as 2200 psi, working pressure ranges
from_______to______psi. - 1, 50
which is the best flame for welding and cutting? - Neutral
Which of the following conditions will cause carburizing or reducing flame? - excess
acetylene
If an operator using an OFC process produced an irregular cut surface with pitting and
undercutting, the most likely cause is - a dirty cutting tip
which of the following is basic definition of concrete? - artificially made rock
what is the term for the weight of all moving and constantly acting loads? - live load
which of the following is not one of the three basic components of concrete? - lime
which of the following is the most accurate range of strengths for concrete? - 3000 to
20,000 psi
when reinforcing concrete, what does the steel add to the concrete? - tensile strength
what size wire is used to tie most rebar? - 16
which of the following is a low foundation wall of sufficient depth to extend below the
frost line? - grade beam
concrete is strong in compression and______, but weak in______. - shear, tension
what are the small "U" or "W" shaped bars placed across a beam to resist diagonal
tension known as? - stirrups
Bar supports are also referred to as - accessories
, the function of the______is to safely transmit the superstructure loads to the ground
without causing settlement. - foundation
in order to connect the column to its supports,______are required. - dowels
in erecting a wall where the footings have been previously doweled, it is necessary for
all dowels to be______and______. - straight, in-line
columns are made up of vertical bars and - bands or ties
what are the end supports for a beam bridge called? - abutments
SMAW uses which of the following electrode polarities? - all of the above
All arc-welding processes require a continuous supply of electrical current. What type of
current can be used for SMAW? - AC or DC
What type of power source yields a small welding current change when there is a large
arc voltage change? - constant current power source.
the majority of SMAW welding is done using direct current electrode positive (DCEP).
This is also known as______. - reverse polarity
Arc length can be defined as the distance from the end of the electrode to the______. -
work piece
The electrode assembly for a specific welding application is selected based on
the______being used to weld. - amperage
If a cable that is too small in diameter is used for a welding application, then what could
be the result? - heat up and could cause a fire
There are 4 main groups of electrodes. These include fast-freeze, fast-fill, fill-freeze and
low______. - hydrogen
An electrode is classified as E7024. What does the 2 stand for? - flat and horizontal
An electrode is classified as E6010. What does the 60 stand for? - tensile strength
Which of the following is the first step to follow when choosing a SMAW electrode for a
specific welding application? - select the required tensile strength
What can be the result of low hydrogen rods picking up moisture in the coating? -
hydrogen-induced cracking of the weld.
2025/2026
A condition in which the flame burns inside the tip, torch or hose is known as a -
flashback
acetylene cylinder valves should be opened only approximately one to one-and-a-half
turns to - provide quick closure in case of an emergency
most oxygen and fuel gas regulators have gauges that measure actual pressure in the
cylinder and - pressure at the torch
while oxygen cylinder pressure may be as high as 2200 psi, working pressure ranges
from_______to______psi. - 1, 50
which is the best flame for welding and cutting? - Neutral
Which of the following conditions will cause carburizing or reducing flame? - excess
acetylene
If an operator using an OFC process produced an irregular cut surface with pitting and
undercutting, the most likely cause is - a dirty cutting tip
which of the following is basic definition of concrete? - artificially made rock
what is the term for the weight of all moving and constantly acting loads? - live load
which of the following is not one of the three basic components of concrete? - lime
which of the following is the most accurate range of strengths for concrete? - 3000 to
20,000 psi
when reinforcing concrete, what does the steel add to the concrete? - tensile strength
what size wire is used to tie most rebar? - 16
which of the following is a low foundation wall of sufficient depth to extend below the
frost line? - grade beam
concrete is strong in compression and______, but weak in______. - shear, tension
what are the small "U" or "W" shaped bars placed across a beam to resist diagonal
tension known as? - stirrups
Bar supports are also referred to as - accessories
, the function of the______is to safely transmit the superstructure loads to the ground
without causing settlement. - foundation
in order to connect the column to its supports,______are required. - dowels
in erecting a wall where the footings have been previously doweled, it is necessary for
all dowels to be______and______. - straight, in-line
columns are made up of vertical bars and - bands or ties
what are the end supports for a beam bridge called? - abutments
SMAW uses which of the following electrode polarities? - all of the above
All arc-welding processes require a continuous supply of electrical current. What type of
current can be used for SMAW? - AC or DC
What type of power source yields a small welding current change when there is a large
arc voltage change? - constant current power source.
the majority of SMAW welding is done using direct current electrode positive (DCEP).
This is also known as______. - reverse polarity
Arc length can be defined as the distance from the end of the electrode to the______. -
work piece
The electrode assembly for a specific welding application is selected based on
the______being used to weld. - amperage
If a cable that is too small in diameter is used for a welding application, then what could
be the result? - heat up and could cause a fire
There are 4 main groups of electrodes. These include fast-freeze, fast-fill, fill-freeze and
low______. - hydrogen
An electrode is classified as E7024. What does the 2 stand for? - flat and horizontal
An electrode is classified as E6010. What does the 60 stand for? - tensile strength
Which of the following is the first step to follow when choosing a SMAW electrode for a
specific welding application? - select the required tensile strength
What can be the result of low hydrogen rods picking up moisture in the coating? -
hydrogen-induced cracking of the weld.
