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Welding > 2020-2021 > Flashcards

2020-2021 Flashcards

1
Q

Eyes are delicate and can be easily burned by welding flash. Flash consists of what tires of light rays?

A

Ultraviolet and infrared

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2
Q

Welding shield (also called welding helmets) provide eye and face protection. The welder looks through a window that contains a glass filter plate. The recommended shade of the filter plate for smaw is ___.

A

10 or 11

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3
Q

What type of electricity flows in more than one direction?

A

Alternating current

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4
Q

The voltage and current required to run a smaw machine can be supplied by _____.

A

Power lines or engine-driven alternators or generators

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5
Q

The device in a smaw power source that changes AC to DC is known as a(n)______.

A

Rectifier

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6
Q

What type of power source yields a small welding current change when there is a large arc voltage change?

A

Constant current power source

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7
Q

The percentage of a ten minute period that a power source operates at is rated output current setting is the machines ______

A

Duty cycle

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8
Q

The majority of smaw welding is done using direct current electrode positive(dcep). This is also known as

A

Reverse polarity

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9
Q

The electrode holder and cable are often referred to as the ______

A

Stinger

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10
Q

A DC power source that is turned off and on at very high speeds is known as an inverter that is using ____technology

A

Chopper

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11
Q

Which of the following is NOT a variable that will affect travel speed?

A

Temperature of the weld

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12
Q

When determining electrode amperages, be sure to consider_____.

A

Position of the weld

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13
Q

The two basic techniques to start an arc are_____.

A

Scratch and strike

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14
Q

Most of the smaw weld applications encountered will ______beads when welding a single pass weld or on the first pass of a multiple pass weld.

A

Stringer

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15
Q

For centuries, the only method used for metllurgically joining metals was ____welding

A

Forge

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16
Q

An innovation in 1932 placed a heavy layer of ____on the seam ahead of the carbon electrode.

A

Flux

17
Q

Smaw is a process for joining metals that used a _____.

A

Flux covered electrode

18
Q

A joint made by overlapping one piece of material over another is a____joint.

A

Lap

19
Q

The place at which the face of the weld and the base metal surfaces meet is called the ____.

A

Toe.

20
Q

Lap joints may be used to splice _____.

A

Quickly with minimum joint preparation

21
Q

A limitation of T-joint is ______.

A

Stress concentration at the joint root increased the risk of fatigue cracking

22
Q

What does a welding symbol include to show the location of a weld

A

Arrow

23
Q

The back and backing weld symbols are ____.

A

Identical

24
Q

Always wear ___.

A

Eye protection

25
Q

If it is necessary to couple lengths of cable together, make sure joints are ____.

A

Insulated

26
Q

Do not hold the welding or cutting to too close to your work; this will cause a(n)____.

A

Flashback

27
Q

Never leave your torch ____and go away from it

A

Burning

28
Q

Do not store cylinders in a room where the temperature is more than _____degrees Fahrenheit

A

80

29
Q

On which of the following metals should you always use air exhaust at the weld?

A

Chromium

30
Q

What should you do with an electrode holder when it is not in use?

A

Hang it in a welding machine

31
Q

Never use a torch as a______

A

Hammer, crowbar, or wedge

32
Q

Which of the following tools removes slag and residue after welding?

A

Chipping hammer

33
Q

Which of the following tools is used for cutting keyways in metal?

A

Cape chisel

34
Q

Which of the following tools is used for cutting v-grooves and cleaning out inside corners?

A

Diamond point chisel

35
Q

Tip drills are used ____.

A

To clean openings in tips

36
Q

Angle and straight grinders are used to _______.

A

Clean joints before and after a welding process

37
Q

A jitterbug ______.

A

Removed slag from welds

38
Q

What is shown through the use of multiple reference lines.

A

Sequence of the entire weld operation

Welding (1 decks)

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