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MIG WELDING 1 MIDTERM EXAM QUESTIONS AND VERIFIED ANSWERS
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MIG WELDING 1 MIDTERM EXAM QUESTIONS AND VERIFIED ANSWERS....
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MIG WELDING 1 MIDTERM EXAM QUESTIONSAND VERIFIED ANSWERS
Shielding gas is used to prevent [_____] of the molten metal during welding. -
ANSWER contamination
A constant [_____] power source is used for GMAW and FCAW. - ANSWER
voltage
two gases used for FCAW are - ANSWER carbon dioxide and argon
The standard for safety in welding, cutting, and allied processes is [_____] -
ANSWER Ansi Z49.1
What are the three main safety areas described in this chapter? - ANSWER
personal safety
welding process safety
welding environment safety
Liquefied gas cylinders are commonly called [_____] and are basically vacuum
bottles. - ANSWER Dewar flasks
work angle should - ANSWER split the joint
Why is some inductance beneficial in GMAW spray transfer mode? -
ANSWER arc starts
On an auxiliary wire feeder, the [_____] control prevents the wire from sticking
in the weld pool. - ANSWER burn back
What four factors determine the selection of material for the manufacture of
GMAW welding wire? - ANSWER chemical composition
mechanical properties
notch toughness values
impurity level limits
, As wire is drawn through a die to reduce its diameter, it becomes hard and must
be [_____] to make it soft. - ANSWER annealed
List five types of defects produced during the drawing operation that can make
wire unusable. - ANSWER cracks
seaming
center bursting
oxide formation
overlap
The AWS specification for stainless steel electrodes for GMAW and FCAW is
[_____]. - ANSWER AWS A5.22
What is a Certificate of Conformance? - ANSWER It is a statement that the
filler material meets the requirements of the material specification.
Level-layer wound electrode wire is used for GMAW hard wires? - ANSWER
false
How many bend tests are required for welder qualification of a groove weld? -
ANSWER 2
At what thickness can side bends be substituted for face and root bends? -
ANSWER 3/8 in
if a welder qualifies for a CJP groove weld he is also qualified to do PJP and
Fillet welds on any material thickness. - ANSWER true
If a welder tests on a 1G (flat) groove weld he is also qualified in what positions
for fillet welds on plate? - ANSWER flat and horizontal
According to the foot notes, what is the minimum diameter of pipe that a welder
is qualified to weld on after passing a plate test? - ANSWER 24 inches
The visual inspection of welds must cover the entire weld including weld tabs. -
ANSWER false
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