Fuel/Gas Cutting and Welding Flashcards

1
Q

The size of a gas cylinder is measured in what units?

A

Cubic Feet

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2
Q

Acetylene cylinders are packed with a porous material saturated with ________, used to absorb a large
quantity of acetylene under pressure.

A

Acetone

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3
Q

Oxy-acetylene system design restricts the oxygen line from being placed in the acetylene side by

A

making the threads of the acetylene connections left handed

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4
Q

. Which type of flame will have an “acetylene feather”, indicating that more oxygen needs to be added

A

Carbonizing

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5
Q

When cutting with oxy-acetylene, what is the common reason for a rough edge and uncut material?

A

Travel Speed too Fast

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6
Q

When piercing plate or pipe, approach the material surface at a _________ angle.

A

45 degree

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7
Q

A braze weld color that is darker than the original brazing rod is an indication of

A

too little heat or too fast a travel speed

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8
Q

When cutting with a hacksaw, select a blade tpi size that allows at least ______ teeth to contact the
material at one time.

A

Three

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9
Q

The hole size for a tap is typically _______ than the tap size for course threads.

A

1/16 Inch

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10
Q

Adjust the tool rest of a stationary grinder within _________ of the wheel

A

1/16 Inch

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11
Q

Annealing means to ____.

A

heat metal to a high temperature and cool very slowly

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12
Q

The purpose of the flux coating on an electrode is to ___

A

Protect the weld from oxygen

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13
Q

All SMAW welding machines are constant current; this means they

A

provide an even supply of amperage to the electrode

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14
Q

A machine’s ____ is a rating that indicates how long the machine can continuously operate at a given
amperage during a ten-minute period without overheating

A

Duty Cycle

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15
Q

What is Slag?

A

weld waste and impurities that form at the top of the weld bead

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16
Q

What is unique about fast freeze electrode

A

provide deep penetration, light slag, and the ability to weld out of position

17
Q

A diffuser on a plasma cutter, also known as a swirl ring, does what to the gas?

A

Causes the gas to swirl and energize

18
Q

When plasma cutting, dross is

A

The debris caused by the cutting process

19
Q

The two main differences between a dedicated SMAW machine and one designed for GTAW are

A

the addition of shielding gas flow rate and amperage controls

20
Q

The difference in the hazards between GTAW and SMAW is that GTAW produces….

A

More light and less smoke

21
Q

What does GTAW stand for?

A

Gas tungsten arc welding

22
Q

What does SMAW stand for?

A

Shielded metal arc welding

23
Q

The first industrial robot was built to do what job?

A

Spot weld on a factory line

24
Q

How many welding jobs will be available by 2025?

A

370,000 open positions