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Flashcards in 2020-2021 Deck (38)
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1

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

Ultraviolet and infrared

2

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 ___.

10 or 11

3

What type of electricity flows in more than one direction?

Alternating current

4

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

Power lines or engine-driven alternators or generators

5

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

Rectifier

6

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

Constant current power source

7

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

Duty cycle

8

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

Reverse polarity

9

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

Stinger

10

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

Chopper

11

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

Temperature of the weld

12

When determining electrode amperages, be sure to consider_____.

Position of the weld

13

The two basic techniques to start an arc are_____.

Scratch and strike

14

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.

Stringer

15

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

Forge

16

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

Flux

17

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

Flux covered electrode

18

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

Lap

19

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

Toe.

20

Lap joints may be used to splice _____.

Quickly with minimum joint preparation

21

A limitation of T-joint is ______.

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

22

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

Arrow

23

The back and backing weld symbols are ____.

Identical

24

Always wear ___.

Eye protection

25

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

Insulated

26

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

Flashback

27

Never leave your torch ____and go away from it

Burning

28

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

80

29

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

Chromium

30

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

Hang it in a welding machine