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Millwright Block 2 (harmonized) NS > SMAW (stick) > Flashcards

SMAW (stick) Flashcards

1
Q

What does SMAW stand for?

A

Shielded metal arc welding

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2
Q

What is shielded metal arc welding?

A

Stick (arc welding)

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3
Q

What is the basic explanation of shielded metal arc welding?

A

Coated electrodes (sticks) are melted by an electric arc to form a weld

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4
Q

What is the common temperature of shielded metal arc welding?

A

Over 9000 degrees Fahrenheit ( 4980 degrees Celsius)

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5
Q

What does ac stand for in terms of power

A

Alternating current

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6
Q

What does dc stand for in terms. Of power

A

Direct current

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7
Q

What does cc stand for in terms of power ?

A

Constant current

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8
Q

What does cv stand for in terms of power?

A

Constant voltage

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9
Q

What is a power source called that can accommodate both cc and cv power?

A

Multi process power sources

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10
Q

What power source is amperage adjustable on?

A

Cc output (constant current)

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11
Q

What power source is output and voltage adjustable on?

A

Cv output (constant voltage)

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12
Q

What determines the amperage output and duty cycle in reference to smaw and where is it found?

A

Thickness of metal
Continuous welding time
Nameplate of the power source and in the owners manual

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13
Q

What is the duty cycle?

A

The percentage of a 10 minute period that a welding power source can be safely operated at a given output

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14
Q

What are the two types of electrode holders?

A

Alligator jaw
Short stub

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15
Q

How are gases used in SMAW processes?

A

From flux burned of the electrode

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16
Q

What does slag do?

A

Protects the weld during cooling

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17
Q

What is the minimum temperature a rod oven should be kept at?

A

120 degrees C (250F)

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18
Q

What should be done with electrodes that have been left exposed to air for a length of time?

A

Dried for 1 hour between 370-430 C (700-800F)

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19
Q

What electrode should NOT be put in an oven?

A

E6010

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20
Q

What type of electrodes MUST be kept dry?

A

Low hydrogen

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21
Q

What is the American welding society (AWS) ID?

A

Electrode code

22
Q

What does the letter E mean in a AWS (American welding society) ID?

A

A covered arc welding electrode

23
Q

What do the first 2 digits indicate in an AWS (American welding society) ID?

A

Minimum tensile strength
In thousands of pounds per square inch (psi)

Ex. 70=70,000psi

24
Q

What does the third digit indicate in an AWS (American Welding Society) ID?

A

The position the electrode can be used in

25
Q

How many position options are there?

A

4

26
Q

What does the #1 in E7018 mean?

A

All position

27
Q

What does the #2 in E7024 mean?

A

Flat and horizontal position

28
Q

What does a #3 in the third digit of a AWS (American welding society) ID mean?

A

Electrode can be used in flat position only

29
Q

What does a #4 in the third digit of a AWS (American welding society) ID mean?

A

Electrode can only be used in a flat and down position

30
Q

What does the final digit indicate in a AWS (American weld Society) ID mean?

A

Indicates the type of coating and polarity

31
Q

What does DCEN mean?

A

Direct current electrode negative

32
Q

What does DCEP mean?

A

Direct Current electrode positive

33
Q

What does the work clamp do?

A

Completes the welding circuit

34
Q

How can a poor work connection be identified with SMAW ?

A

Checking the welding connections for warmth

35
Q

If a welding connection is warm what should you do?

A

Up the wire size or check connections

36
Q

If a welding current in SMAW is between 60-160 what colour shade should you be wearing?

A

8-10

37
Q

If the welding current is between 250-550 what colour shade should you be wearing?

A

11-14

38
Q

What is a magnifier in terms of welding shields?

A

A lens to replace wearing prescription glasses

39
Q

What are the 4 types of welds used to fill a gap?

A

Root weld
Filler
Cover
Finish

40
Q

What weld goes on the bottom of a gap?

A

Root weld

41
Q

What weld fills the most space and gives the most strength?

A

A filler weld

42
Q

How many welding position numbers are there?

A

4

43
Q

I’m terms of electrode identification what numbers indicate no oven?

A

0 and 1 for type of coating

44
Q

What do the first 2 digits on an electrode identification mean?

A

Tensile strength x1000

45
Q

What does the 3rd digit on an electrode identification mean?

A

Welding positions

46
Q

What number means all position on an electrode identification?

A

Third digit #1 only

47
Q

What does fast freeze mean in terms of electrodes (SMAW)

A

Takes form quickly ideal for horizontal and overhead

48
Q

What does fast fill mean in terms of SMAW electrodes?

A

An electrode with a high deposit rate

49
Q

How can you tell if the amperage is too high? (SMAW)

A

Electrode turns red
Weld is red 3/4” after stopping arc

50
Q

How large should the weld size be in comparison to the electrode?

A

2x the diameter of the core size

51
Q

What is a keyhole in terms of SMAW?

A

Slight groove on the end/beginning of the weld indicating proper penetration

52
Q

When is a weld too tall with not enough penetration?

A

If it’s 1/8” above the metal or greater

Millwright Block 2 (harmonized) NS (17 decks)

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