True/False
Indicate whether the sentence or statement is true or
false.
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1.
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AC welders are very popular
because the initial cost is low and they can handle most common welding jobs.
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2.
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DC welders are generator type
welding machines that are powered by electric motors, gas engines or other power
sources.
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3.
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One advantage of a DC welder is
that it needs to be plugged into a power source.
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4.
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Polarity is the direction in
which the current flows across the arc.
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5.
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AC/DC welders have the
advantage of only being able to do free hand welding, and automatic welding.
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6.
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A TIG welder can only be used
on an AC setting.
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7.
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The “Tig” process
of welding is called tungsten inert gas.
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8.
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The “Mig” process
of welding is called metallic inverted gas
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9.
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When welding with the mig a
consumable wire electrode is used instead of a rod.
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Multiple
Choice
Identify the letter of the choice that best completes the statement or answers the
question.
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10.
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What does alternating current
mean? a. | accelerating current | c. | advancing current | b. | alternating current | d. | none of the above | | | | |
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11.
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An AC welder reverses or
alternates it’s direction of flow how many times per second?
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12.
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What does direct current
mean? a. | descending current | c. | divisional current | b. | directional current | d. | direct current | | | | |
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13.
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DC flows steadily and
constantly: a. | in one direction | c. | through the welding
machine | b. | across the arc | d. | all of the above are
correct | | | | |
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14.
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Reverse polarity should be used
to weld what types of metal? a. | mild steel | c. | aluminum, bronze and mild
steel | b. | cast iron, thin steel | d. | cast iron, copper, mild steel and
brass | | | | |
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15.
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The Tig process can also be
referred to as: a. | gas tungsten arc welding | c. | shielded metal arc
welding | b. | gas metal arc welding | d. | none of the above are
correct | | | | |
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16.
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Some advantages of the tig
welding process are: a. | welds are free of corrosive
residue | c. | there is no splatter when welding | b. | welds are free of fumes and slag | d. | all of the above are
correct | | | | |
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17.
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Which of the following are
other forms of welding? a. | Laser | c. | cybergas | b. | submerged arc and electroslag | d. | both a and b are
correct | | | | |
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