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Shielded Metal Arc Welding (SMAW) > Line D 6-7 > Flashcards

Line D 6-7 Flashcards

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1
Q

Cellulose in electrode coatings helps to:

a. Increase weld metal deposition rates.
b. Bind the flux ingredients together.
c. Increase penetration.
d. Produce a thick slag covering for the weld.

A

c. Increase penetration.

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2
Q

The formation of slag on the weld helps to:

a. Protect the weld as it cools.
b. Help shape the weld pool.
c. Float impurities to the surface of the weld.
d. All of the above.

A

d. All of the above.

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3
Q

How are SMAW electrodes measured?

a. Outer diameter of the electrode with the flux coating.
b. Outer diameter of the inner wire of the electrode.
c. The length of the electrode.
d. The weight of the electrode.

A

b. Outer diameter of the inner wire of the electrode.

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4
Q

What is the most common electrode length?

a. 254 mm (10 in).
b. 300 mm (12 in).
c. 350 mm (14 in).
d. 406 mm (16 in).

A

c. 350 mm (14 in).

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5
Q

Electrodes come in lengths of 225 mm (9 in) to:

a. 350 mm (14 in).
b. 609 mm (24 in).
c. 1000 mm (36 in).
d. 1219 mm (48 in).

A

c. 1000 mm (36 in)

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6
Q

Electrode diameters range from 1.6 mm (1/16 in) to:

a. 4 mm (5/32 in).
b. 4.8 mm (3/16 in).
c. 5.6 mm (7/32 in).
d. 6.4 mm (1/4 in).

A

d. 6.4 mm (1/4 in).

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7
Q

Electrodes grouped by operating characteristic fall into one of 4 categories: fast-freeze, fast-fill, low-hydrogen, and:

a. Slow-freeze.
b. Slow-fill.
c. Fill-freeze.
d. Fast-freeze and fill.

A

c. Fill-freeze.

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8
Q

Fast-fill electrodes are categorized by:

a. Heavy slag.
b. High deposition rates.
c. Used in flat and horizontal positions.
d. All of the above.

A

d. All of the above.

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9
Q

How does American Society of Mechanical Engineers (ASME) classify electrodes?

a. Letter code.
b. Number code.
c. Letter and number code.
d. F-number.

A

d. F-number.

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9
Q

Which category of electrode is well suited to welding sheet metal?

a. Fast-fill.
b. Fast-freeze.
c. Fill-freeze.
d. Low-hydrogen.

A

c. Fill-freeze.

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10
Q

What helps keep the weld metal in position when welding in the overhead position?

a. Gravity.
b. Gas expansion.
c. Electromagnetic force.
d. Surface tension.

A

d. Surface tension.

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11
Q

Gravity can both help and hinder metal transfer when shielded metal arc welding. True or false?

a. True.
b. False.

A

a. True.

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12
Q

What is the biggest difference between the CSA and AWS systems for classifying electrodes?

a. AWS number system is different than CSA.
b. CSA is in metric and AWS is imperial.
c. They are the same.
d. AWS letter system is different than CSA.

A

b. CSA is in metric and AWS is imperial.

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13
Q

The number 8 in the 4th position of an electrode code designates:

a. AC current only with a sodium coating.
b. AC or DCEP current and basic electrode coating.
c. DCEP current and cellulose electrode coating.
d. DCEN current and basic electrode coating.

A

b. AC or DCEP current and basic electrode coating.

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14
Q

What does the third digit slot in an electrode code designate?

a. Position it can be used in.
b. Polarity it is to be welded in.
c. Tensile strength.
d. Electrode coating type.

A

a. Position it can be used in.

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15
Q

Electrode classification doesn’t need to be printed on each electrode, the box is good enough. True or false?

a. True.
b. False.

A

b. False.

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15
Q

High deposition electrodes are usually used in _____ positions:

a. Vertical and overhead.
b. All.
c. Flat and horizontal.
d. Flat only.

A

c. Flat and horizontal.

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16
Q

What is the most commonly used electrode?

a. EXX10.
b. EXX14.
c. EXX18.
d. EXX24.

A

c. EXX18.

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17
Q

Smaller diameter electrodes are usually used for:

a. Out of position welding.
b. Sheet metal.
c. Anywhere requiring lower heat input.
d. All of the above.

A

d. All of the above.

18
Q

Which of the following electrodes would have the highest deposition rate per hour?

a. E4310 (E6010).
b. E4918 (E7018).
c. E4914 (E7014).
d. E4924 (E7024).

A

a. E4310 (E6010).

19
Q

Question 21: Which of the following is an all-position electrode?

a. E4918 (E7018).
b. E4924 (E7024).
c. E4310 (E6010).
d. E4326 (R7026).

A

c. E4310 (E6010).

20
Q

E4914 (E7014) can be used with all polarities. True or false?

a. True.
b. False.

A

a. True.

21
Q

Low-alloy electrodes are covered by CSA code:

a. A5.5.
b. W48.
c. W49.
d. A48.

A

a. A5.5.

22
Q

Low alloy electrode designations have a 2-digit suffix identifying alloying elements in the electrode. True or false?

a. True.
b. False.

A

a. True.

23
Q

The most common stainless-steel alloys are part of the _____ series.

a. 200.
b. 300.
c. 400.
d. 500.

A

b. 300.

24
Q

If a stainless-steel electrode code has an “L” attached to it, this indicates:

a. Low hydrogen.
b. Low carbon.
c. Low nickel.
d. Low iron.

A

b. Low carbon.

25
Q

Unlike low-carbon steel electrodes, the first 3 digits in an electrode code for stainless-steel electrodes indicate alloy type instead of tensile strength. True or false?

a. True.
b. False.

A

b. False

26
Q

Which stainless-steel electrode is used to join low-carbon steel to stainless steel?

a. E308-16.
b. E309-15.
c. E E308L.
d. E316-16.

A

a. E308-16.

27
Q

Cast iron electrodes are identified by a letter and number combination. True or false?

a. True.
b. False.

A

b. False.

28
Q

What is another name for ENi cast iron electrodes?

a. Nickel rod.
b. Ni-rod.
c. Cast rod.
d. Steel rod.

A

b. Ni-rod.

29
Q

How do you select which type of hardfacing electrode to use?

a. Type of working conditions.
b. Type of wear encountered.
c. Type of qualities required.
d. All of the above.

A

d. All of the above.

30
Q

Hardfacing electrodes don’t have a classification system. True or false?

a. True.
b. False.

A

a. True.

31
Q

Which hardfacing alloy is the hardest?

a. Tungsten carbides.
b. Manganese steels.
c. Austenitic stainless steels.
d. Chromium carbides.

A

a. Tungsten carbides.

32
Q

Which hardfacing electrode has excellent corrosion resistance?

a. Chromium carbides.
b. Austenitic stainless steels.
c. High-speed steel.
d. Tungsten carbides.

A

b. Austenitic stainless steels.

33
Q

Wet electrodes can be re-baked and used. True or false?

a. True.
b. False.

A

b. False.

34
Q

Question 36: At what temperature should low-hydrogen electrodes be stored in ovens?

a. 100 °C (212 °F).
b. 120 °C (248 °F).
c. 140 °C (284 °F).
d. 160 °C (320 °F).

A

b. 120 °C (248 °F).

35
Q

How long can low hydrogen electrodes be out in the ambient air before they are required to go back in the oven?

a. 1 hour.
b. 2 hours.
c. 3 hours.
d. 4 hours.

A

d. 4 hours.

36
Q

Primary variables include arc length, travel speed, and:

a. Work angle.
b. Travel angle.
c. Welding technique.
d. Welding current.

A

d. Welding current.

37
Q

Where are process specific variable settings usually found?

a. Welding machine manual.
b. Welding procedure data sheet.
c. Shop foreman.
d. Welding electrode specification chart.

A

b. Welding procedure data sheet.

38
Q

Arc length is measured from tip of the electrode to the weld pool surface. True or false?

a. True.
b. False.

A

a. True

39
Q

What is the first step in trying to set your welder up for welding?

a. Selecting polarity.
b. Selecting type of electrode.
c. Selecting weld joint design.
d. All of the above.

A

d. All of the above.

40
Q

What is work angle?

a. Electrode angle lengthwise down the joint.
b. Electrode angle across the weld joint.
c. Angle of the base metal to level.
d. Angle of the base metal to vertical.

A

a. Electrode angle lengthwise down the joint.

40
Q

What is the general rule of thumb to determine the arc length?

a. One times the inner core wire diameter of the electrode.
b. Two times the inner core wire diameter of the electrode.
c. Three times the inner core wire diameter of the electrode.
d. Four times the inner core wire diameter of the electrode.

A

a. One times the inner core wire diameter of the electrode.

41
Q

What is another name for “Inclination”?

a. Work angle.
b. Travel angle.
c. Downhill.
d. Uphill.

A

b. Travel angle.

42
Q

Welder comfort is the most important part for having good welding technique. True or false?

a. True.
b. False.

A

b. False.

42
Q

Weaving shouldn’t exceed _____ times the width of the electrode diameter.

a. 1 1/2 times.
b. 2 times.
c. 2 1/2 times.
d. 3 times.

A

c. 2 1/2 times.

Shielded Metal Arc Welding (SMAW) (4 decks)

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