NCCER Ironworker Final Exam Questions/Answer Graded A+
2026/2027
the kindling temperature of steel is - correct answer -1600 degrees
one advantage of the OFC process is that it is - correct answer -portable
the materials that can be cut with OFC are limited primarily to _______materials - correct answer -
ferrous
A welder opens the cylinder valve slightly and closes it immediately. what process did he/she perform? -
correct answer -cracking the cylinder
A device that prevents the reverse flow of gasses that would result in a combustible mixture in the
welding hose is a - correct answer -check valve
A condition in which the flame burns inside the tip, torch or hose is known as a - correct answer -
flashback
acetylene cylinder valves should be opened only approximately one to one-and-a-half turns to - correct
answer -provide quick closure in case of an emergency
most oxygen and fuel gas regulators have gauges that measure actual pressure in the cylinder and -
correct answer -pressure at the torch
while oxygen cylinder pressure may be as high as 2200 psi, working pressure ranges
from_______to______psi. - correct answer -1, 50
, NCCER Ironworker Final Exam Questions/Answer Graded A+
2026/2027
which is the best flame for welding and cutting? - correct answer -Neutral
Which of the following conditions will cause carburizing or reducing flame? - correct answer -excess
acetylene
If an operator using an OFC process produced an irregular cut surface with pitting and undercutting, the
most likely cause is - correct answer -a dirty cutting tip
which of the following is basic definition of concrete? - correct answer -artificially made rock
what is the term for the weight of all moving and constantly acting loads? - correct answer -live load
which of the following is not one of the three basic components of concrete? - correct answer -lime
which of the following is the most accurate range of strengths for concrete? - correct answer -3000 to
20,000 psi
when reinforcing concrete, what does the steel add to the concrete? - correct answer -tensile strength
what size wire is used to tie most rebar? - correct answer -16
which of the following is a low foundation wall of sufficient depth to extend below the frost line? -
correct answer -grade beam
concrete is strong in compression and______, but weak in______. - correct answer -shear, tension
what are the small "U" or "W" shaped bars placed across a beam to resist diagonal tension known as? -
correct answer -stirrups
2026/2027
the kindling temperature of steel is - correct answer -1600 degrees
one advantage of the OFC process is that it is - correct answer -portable
the materials that can be cut with OFC are limited primarily to _______materials - correct answer -
ferrous
A welder opens the cylinder valve slightly and closes it immediately. what process did he/she perform? -
correct answer -cracking the cylinder
A device that prevents the reverse flow of gasses that would result in a combustible mixture in the
welding hose is a - correct answer -check valve
A condition in which the flame burns inside the tip, torch or hose is known as a - correct answer -
flashback
acetylene cylinder valves should be opened only approximately one to one-and-a-half turns to - correct
answer -provide quick closure in case of an emergency
most oxygen and fuel gas regulators have gauges that measure actual pressure in the cylinder and -
correct answer -pressure at the torch
while oxygen cylinder pressure may be as high as 2200 psi, working pressure ranges
from_______to______psi. - correct answer -1, 50
, NCCER Ironworker Final Exam Questions/Answer Graded A+
2026/2027
which is the best flame for welding and cutting? - correct answer -Neutral
Which of the following conditions will cause carburizing or reducing flame? - correct answer -excess
acetylene
If an operator using an OFC process produced an irregular cut surface with pitting and undercutting, the
most likely cause is - correct answer -a dirty cutting tip
which of the following is basic definition of concrete? - correct answer -artificially made rock
what is the term for the weight of all moving and constantly acting loads? - correct answer -live load
which of the following is not one of the three basic components of concrete? - correct answer -lime
which of the following is the most accurate range of strengths for concrete? - correct answer -3000 to
20,000 psi
when reinforcing concrete, what does the steel add to the concrete? - correct answer -tensile strength
what size wire is used to tie most rebar? - correct answer -16
which of the following is a low foundation wall of sufficient depth to extend below the frost line? -
correct answer -grade beam
concrete is strong in compression and______, but weak in______. - correct answer -shear, tension
what are the small "U" or "W" shaped bars placed across a beam to resist diagonal tension known as? -
correct answer -stirrups
