Welding Current Quiz: SMAW Exam Prep

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Questions and Answers

What is not required for SMAW process?

Gas Supply

What electrode is not suitable for all positions?

E7024

An engine-driven generator without a rectifier produces what form of current?

What is an incorrect statement about an E7018 electrode?

That they are only suitable for flat portions and horizontal fillet only Signup and view all the answers

The distance from the molten tip of the SMAW electrode to the surface of the weld pool should be...

one electrode diameter Signup and view all the answers

Which group of electrodes is of low hydrogen type?

E7015 E7016 E7018 Signup and view all the answers

"Arc Blow" is caused by?

Magnetic forces associated with direct current Signup and view all the answers

"Duty Cycle" is a term used to indicate the...

Percentage of time in a 10 min period a machine can operate at rated output Signup and view all the answers

When the welding machine is set to DECP, current flows (-,+) from the _ to the __.

work, electrode Signup and view all the answers

Which (of the following) welding cable sizes is the largest?

#2/0 Signup and view all the answers

Rectifiers are noted for their ability to...

Change A/C to D/C Signup and view all the answers

In North America, alternating current changes direction...

60 times per second also known as 60 Hz Signup and view all the answers

In order to reduce waste and control cost, you should weld until the electrode is...

down to the classification numbers Signup and view all the answers

The last digit in the electrode classification E7018 indicates...

Flux type and current/type of current Signup and view all the answers

The E7024 electrode can be used in...

flat and horizontal fillet Signup and view all the answers

The electrode classification that indicates a deep penetrating electrode that can be used with AC is...

E6011 Signup and view all the answers

Back stepping at the end of the weld with the SMAW process...

helps prevent crater cracking Signup and view all the answers

The first 2 digits of the electrode classification indicates...

Minimum tensile strength Signup and view all the answers

An E6010 deep penetrating electrode belongs to which F group?

F3 Signup and view all the answers

SMAW and GTAW machines both use...

Constant Current Signup and view all the answers

GMAW and FLAW machines use...

Constant Voltage Signup and view all the answers

When terminating a weld, the welding codes require that the crater be filled to the ________ of the weld.

Cross section Signup and view all the answers

In E8018 what does the 80 stand for?

Tensile strength Signup and view all the answers

In E8018 what does the 1 stand for?

Weld position Signup and view all the answers

In E8018 what does the second 8 position relate to?

Flux type and current Signup and view all the answers

E6013 is characterized by...

All, Titania Potassium, AC,DCEP,DCEN, Shallow penetration Signup and view all the answers

E7024 is used for...

Flat, Hor. Fillet, Titania Iron Powder, AC,DCEP,DCEN, Medium penetration, fast deposit Signup and view all the answers

E7018 is noted for...

All, Iron Powder Low-Hydrogen, AC,DCEP, Shallow to Medium Penetration Signup and view all the answers

E6010 is used for...

All, Cellulose Sodium, DCEP, Deep Penetration, Flat Beads Signup and view all the answers

SMAW equipment is portable because the welding machines can be powered with gasoline or diesel engines.

True Signup and view all the answers

Excessive spatter and undercutting of weld joints can be caused by current values being set too high.

True Signup and view all the answers

How many fillet weld gauges are there?

7 Signup and view all the answers

What is the welding current range for 3/32" 7018 Hyundai Electrodes?

F 60-90 V, OH 50-80 Signup and view all the answers

Study Notes

SMAW Welding Process Essentials

SMAW (Shielded Metal Arc Welding) does not require a gas supply for operation.
The E7024 electrode is not suitable for vertical or overhead positions.
Engine-driven generators without rectifiers provide alternating current (AC).
E7018 electrodes are incorrectly believed to be limited to flat and horizontal fillet welds; they can be used in various positions.
The ideal distance from the molten tip of the SMAW electrode to the weld pool is one electrode diameter for optimal welding.

Electrode Groups and Characteristics

Low-hydrogen electrodes include E7015, E7016, and E7018.
"Arc Blow" occurs due to magnetic forces related to direct current usage.
The duty cycle of a machine refers to the percentage of time in a 10-minute period that it can operate at its rated output.

Electrical Current and Setup

In direct current electrode positive (DCEP) settings, current flows from the workpiece to the electrode.
The largest welding cable size compared is #2/0.
Rectifiers convert alternating current (AC) to direct current (DC).
In North America, AC changes direction 60 times per second, known as 60 Hz.

Electrode Specifications

To minimize waste and costs, electrodes should be used down to their classification numbers.
In E7018 classification, the last digit indicates flux type and the type of current.
E7024 electrodes are suitable for flat and horizontal fillet welds.
E6011 electrodes are known for deep penetration and can be used with AC.

Techniques and Welding Positions

Back stepping at the end of a weld with SMAW prevents crater cracking.
The first two digits of the electrode classification indicate minimum tensile strength.
E6010 is classified under group F3 for deep penetration.

Current Settings and Welder Equipment

SMAW and GTAW (Gas Tungsten Arc Welding) machines operate on constant current.
GMAW (Gas Metal Arc Welding) and FLAW (Fluxed Gas Arc Welding) use constant voltage.
Welding codes require that a weld crater be filled to the cross-section of the weld when terminating.

Understanding Electrode Classifications

In E8018, '80' signifies tensile strength, and '1' represents the weld position. The second '8' indicates the flux type and current.
E6013 electrodes have shallow penetration and are versatile in current options (AC, DCEP, DCEN).
E7024 electrodes are iron powder type with medium penetration and fast deposit rate.
E7018 electrodes are low-hydrogen, providing shallow to medium penetration characteristics.

Miscellaneous Information

SMAW equipment is portable; it can be powered by gasoline or diesel engines.
Excessive spatter and undercutting may occur when current values are set too high.
There are seven different gauges for measuring fillet welds.
Welding current range for 3/32" 7018 Hyundai electrodes is F 60-90 volts and OH 50-80 amps.

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Prepare for your SMAW welding exam with this collection of flashcards. Each card provides essential definitions and concepts related to the SMAW process, including electrode types and current forms. Master the key points to excel in your welding certification test.

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