NOCTI Welding Certification Practice Test with
490 Questions and Correct Verified Answers/
Welding NOCTI exam Prep Test Bank
What does GTAW stand for? - ANSWER-Gas Tungsten Arc Welding
What is another common name for GTAW? - ANSWER-TIG welding
What type of electrode is used in GTAW? - ANSWER-Nonconsumable tungsten
electrode
What protects the weld pool in GTAW? - ANSWER-Inert shielding gas
What shielding gas is most commonly used for GTAW? - ANSWER-Argon
What creates the arc in GTAW? - ANSWER-Electric arc between tungsten and
workpiece
What supplies filler metal in GTAW? - ANSWER-Separate filler rod
What is the purpose of a foot pedal in GTAW? - ANSWER-Control amperage
during welding
What polarity is typically used for steel in GTAW? - ANSWER-DCEN (straight
polarity)
1
,What polarity is commonly used for aluminum in GTAW? - ANSWER-AC
What does AC current help remove when welding aluminum? - ANSWER-Oxide
layer
What component directs shielding gas around the weld? - ANSWER-Ceramic cup
or nozzle
What is the purpose of a collet? - ANSWER-Hold the tungsten electrode
Why must tungsten be sharpened to a point for DC welding? - ANSWER-Focus
the arc
What happens if tungsten touches the weld pool? - ANSWER-Contamination
occurs
What should be done if tungsten becomes contaminated? - ANSWER-Regrind or
replace
What is a common filler rod classification for mild steel? - ANSWER-ER70S-2 or
ER70S-6
What property allows metal to be hammered into shape without breaking? -
ANSWER-Malleability
What property allows metal to be drawn into wire? - ANSWER-Ductility
2
,What is hardness? - ANSWER-Resistance to scratching or wear
What is strength? - ANSWER-Ability to withstand applied force without failure
What is toughness? - ANSWER-Ability to absorb energy before breaking
What is brittleness? - ANSWER-Tendency to fracture with little deformation
What is elasticity? - ANSWER-Ability to return to original shape after stress
What is preheating metal before welding used for? - ANSWER-Reduce cracking
and thermal shock
What metals often require preheating? - ANSWER-High-carbon and thick steels
What is post-heating (postheat) used for? - ANSWER-Relieve stress and reduce
hydrogen cracking
What causes weld distortion? - ANSWER-Uneven heating and cooling
What is a common method to control distortion? - ANSWER-Clamping and tack
welding
What technique balances shrinkage to reduce warping? - ANSWER-Welding in
alternating or staggered sequence
3
, What is the purpose of welding symbols on drawings? - ANSWER-Communicate
weld requirements clearly
What line forms the base of a welding symbol? - ANSWER-Reference line
What does the arrow in a welding symbol indicate? - ANSWER-Location of the
weld joint
What does a fillet weld symbol look like? - ANSWER-Right triangle
Where is the weld placed if the symbol is below the reference line? - ANSWER-
Arrow side
Where is the weld placed if the symbol is above the reference line? - ANSWER-
Other side
What does a circle at the arrow junction indicate? - ANSWER-Weld all around
What does a flag at the arrow indicate? - ANSWER-Field weld
What number to the left of a fillet symbol represents? - ANSWER-Weld size
What number to the right of a weld symbol represents? - ANSWER-Weld length
What does the finish symbol indicate? - ANSWER-Method of finishing weld
(grind, machine, etc.)
4
490 Questions and Correct Verified Answers/
Welding NOCTI exam Prep Test Bank
What does GTAW stand for? - ANSWER-Gas Tungsten Arc Welding
What is another common name for GTAW? - ANSWER-TIG welding
What type of electrode is used in GTAW? - ANSWER-Nonconsumable tungsten
electrode
What protects the weld pool in GTAW? - ANSWER-Inert shielding gas
What shielding gas is most commonly used for GTAW? - ANSWER-Argon
What creates the arc in GTAW? - ANSWER-Electric arc between tungsten and
workpiece
What supplies filler metal in GTAW? - ANSWER-Separate filler rod
What is the purpose of a foot pedal in GTAW? - ANSWER-Control amperage
during welding
What polarity is typically used for steel in GTAW? - ANSWER-DCEN (straight
polarity)
1
,What polarity is commonly used for aluminum in GTAW? - ANSWER-AC
What does AC current help remove when welding aluminum? - ANSWER-Oxide
layer
What component directs shielding gas around the weld? - ANSWER-Ceramic cup
or nozzle
What is the purpose of a collet? - ANSWER-Hold the tungsten electrode
Why must tungsten be sharpened to a point for DC welding? - ANSWER-Focus
the arc
What happens if tungsten touches the weld pool? - ANSWER-Contamination
occurs
What should be done if tungsten becomes contaminated? - ANSWER-Regrind or
replace
What is a common filler rod classification for mild steel? - ANSWER-ER70S-2 or
ER70S-6
What property allows metal to be hammered into shape without breaking? -
ANSWER-Malleability
What property allows metal to be drawn into wire? - ANSWER-Ductility
2
,What is hardness? - ANSWER-Resistance to scratching or wear
What is strength? - ANSWER-Ability to withstand applied force without failure
What is toughness? - ANSWER-Ability to absorb energy before breaking
What is brittleness? - ANSWER-Tendency to fracture with little deformation
What is elasticity? - ANSWER-Ability to return to original shape after stress
What is preheating metal before welding used for? - ANSWER-Reduce cracking
and thermal shock
What metals often require preheating? - ANSWER-High-carbon and thick steels
What is post-heating (postheat) used for? - ANSWER-Relieve stress and reduce
hydrogen cracking
What causes weld distortion? - ANSWER-Uneven heating and cooling
What is a common method to control distortion? - ANSWER-Clamping and tack
welding
What technique balances shrinkage to reduce warping? - ANSWER-Welding in
alternating or staggered sequence
3
, What is the purpose of welding symbols on drawings? - ANSWER-Communicate
weld requirements clearly
What line forms the base of a welding symbol? - ANSWER-Reference line
What does the arrow in a welding symbol indicate? - ANSWER-Location of the
weld joint
What does a fillet weld symbol look like? - ANSWER-Right triangle
Where is the weld placed if the symbol is below the reference line? - ANSWER-
Arrow side
Where is the weld placed if the symbol is above the reference line? - ANSWER-
Other side
What does a circle at the arrow junction indicate? - ANSWER-Weld all around
What does a flag at the arrow indicate? - ANSWER-Field weld
What number to the left of a fillet symbol represents? - ANSWER-Weld size
What number to the right of a weld symbol represents? - ANSWER-Weld length
What does the finish symbol indicate? - ANSWER-Method of finishing weld
(grind, machine, etc.)
4
