LA City Welder Certification Quiz!

2.

What is the maximum diameter of E7018 electrode that can be used for a weld in the vertical position?
- 5/32"
- 1/8"
- 1/4"
- 7/32"
Correct Answer

A. 5/32"

Explanation

Table 3.6 Prequalified WPS Requirements - there is a notion of a lower case "b" that states all EXX14 and EXX15, EXX16 and EXX18(low hydrogen electrodes) shall be a maximum diameter of 5/32" for Vertical and Overhead positions

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1
3.

What is the maximum prequalified size a single pass 2F weld on ASTM A 36 plate be according to AWS D1.1, if welded with an E 7018 electrode?
- 3/8"
- 1/2"
- 5/16"
- 1/4"
Correct Answer

A. 5/16"

Explanation

Table 3.6 Prequalified WPS Requirements find by looking in index for MAXIMUM ELECTRODE DIAMETER

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1
4.

What size spacer is required on a prequalified joint B-U3a-S?
- 1/4" x 1/2"
- 1/8" x 5/8"
- 1/4" x 3/16"
- 1/4" x 5/8"
Correct Answer

A. 1/4" x 5/8"

Explanation

Figure 3.3 Prequalified CJP Groove Welded Joint DetailsThis is one of those questions you can't find by looking in the index, you have to know that Figure 3.3 and 3.2 is where you look up prequalified joints, First go to the Legend on page 65, which lets you know what the letters and numbers mean, B=butt joint, U unlimited, 3=double V groove, a= backing (I know this because my teacher had us write it in the book along with the letter b =no backing, and c= other minor differences) The book states lower case letters are used to differentiate between joints that would otherwise have the same joint designation and S = SAW. Now look for joint B-U3a-S in the Figure 3.3 Page 85 it will show you Spacer = 1/4 x R, R =5/8 so your answer is 1/4 x 5/8 ....

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3
5.

For a joint with a base metal 3/4" thick, what designation hole type IQI should be used?
- 20
- 10
- 12
- 17
Correct Answer

A. 17

Explanation

Table 6.4 Hole -Type IQI Requirements see nominal material thickness range(they are in decimal format) you have to convert from fraction to decimal or write in the fraction next to it now in your book, answers is 17.Index IQI

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1
6.

Prequalified welding procedures may be used to weld studs with the following process______
- FCAW, GMAW, SMAW
- SMAW
- GTAW, GMAW
- Prequalified welding process are not acceptable for welding studs
Correct Answer

A. FCAW, GMAW, SMAW

Explanation

Clause 7.5.5 FCAW, GMAW, SMAW FIllet Weld Option -at the option of the Contractor, studs may be welded using prequalified FCAW, GMAW, or SMAW process, provided the following requirements are met in clauses 7.5.5.1 - 7.5.5.7 Page 247 look in the Index under Studs prequalified processes

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1
7.

For what position(s) is/are a WPS qualified when the qualification test welds are slot welds in the horizontal position?
- Flat and horizontal
- All except overhead
- All
- Horizontal
Correct Answer

A. Horizontal

Explanation

Table 4.1 WPS Qualification- Production Welding Positions Qualified by Plate, Pipe and Box Tube Tests - Plug/Slot only qualifies for only the position tested Page 120 Index WPS qualification

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1
8.

For GMAW, the shielding gases must exhibit a dew point of ________?
- -20 degrees F[ -20 degrees C ] or lower
- -40 degrees F [-40 degrees C] or lower
- -40 degrees F
- -20 degrees C or lower
Correct Answer

A. -40 degrees F [-40 degrees C] or lower

Explanation

C (Commentary) -5.3.1.3 Shielding Gas therefore it is mandatory to have -40 degree F[-40 degree C] or lower dew point in shielding gas Page 505-506 INDEX- shielding gas

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1
9.

Which of the following electrodes can be used on a weathering steel like ASTM A558?
- EXXXX-B2L
- E6010
- E7018
- Option4
Correct Answer

A. EXXXX-B2L

Explanation

Table 3.4 - Approved electrodes that deposit weld metal meeting a B2L, C1, C1L, C2, C2L, C3, or WX analysis per A5.5 *see notion "a" deposited weld metal shall have a chemical composition the same as that for any one of the weld metals in this table Page 60 Index weathering steel

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2
10.

When stress relieving a weldment at a temperature of 150 degrees F below the minimum specified temperature, what is the minimum holding time per inch of thickness?
- 2 hours
- 4 hours
- 10 hours
- 20 hours
Correct Answer

A. 10 hours

Explanation

Table 5.3 Alternate Stress- Relief Heat Treatment [Index] Stress Relief, alternate temperatures PAGE 180

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1
11.

On flexible connections, the maximum length of the end return is _______times the nominal size of weld?
- 3
- 4
- 5
- 2
Correct Answer

A. 4

Explanation

Figure 2.7 - End Return at Flexible Connections Return is greater than or equal to 2W less than or equal to 4W W =nominal size of weld. Page 40 Index End Returns (write note next to Fig. 2.7 max and min.)

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1
12.

What is the root opening for a prequalified joint TC-U4a with a 45 degree angle?
- 1/8"
- 3/8"
- Not specified
- 1/4"
Correct Answer

A. 1/4"

Explanation

Figure 3.3 Prequalified CJP Groove Welded Joint Details Page 87

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3
13.

Using E6010 in the 3G position what is the maximum electrode diameter?
- 3/16"
- 5/32"
- 1/4"
- 5/16"
Correct Answer

A. 3/16"

Explanation

Table 3.6 Prequalified WPS Requirements page 61 [INDEX] Max. Electrode Diameter

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1
14.

The recommended nominal thickness of backing bars for the GMAW process is
- 1/4"
- 1/8"
- 3/16"
- Not specified
Correct Answer

A. 1/4"

Explanation

C-5.9.1.3 Backing Thickness page 509 INDEX Backing Thickness

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1
15.

What percentage of wire feed speed would require a WPS requalification for the FCAW process?
- >25%
- No change
- > 10%
- <15%
Correct Answer

A. > 10%

Explanation

Table 4.5 PQR Variable Changes requiring WPS requalification for SMAW, SAW ,GMAW, FCAW, and GTAW page 124 [INDEX] wire feed speed

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2
16.

What is the minimum fillet weld size requirement for welding a 7/8" stud?
- 3/16"
- 1/4"
- 1/8"
- 5/16"
Correct Answer

A. 5/16"

Explanation

Table 7.2 min. fillet weld size for small diameter studs [INDEX-STUDS fillet weld size 7.5.5.4] PAGE 251, 247

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2

LA City Welder Certification Quiz!

When may studs be furnished without flux?

Quiz Preview

What is the maximum diameter of E7018 electrode that can be used for a weld in the vertical position?

What is the maximum prequalified size a single pass 2F weld on ASTM A 36 plate be according to AWS D1.1, if welded with an E 7018 electrode?

What size spacer is required on a prequalified joint B-U3a-S?

For a joint with a base metal 3/4" thick, what designation hole type IQI should be used?

Prequalified welding procedures may be used to weld studs with the following process______

For what position(s) is/are a WPS qualified when the qualification test welds are slot welds in the horizontal position?

For GMAW, the shielding gases must exhibit a dew point of ________?

Which of the following electrodes can be used on a weathering steel like ASTM A558?

When stress relieving a weldment at a temperature of 150 degrees F below the minimum specified temperature, what is the minimum holding time per inch of thickness?

On flexible connections, the maximum length of the end return is _______times the nominal size of weld?

What is the root opening for a prequalified joint TC-U4a with a 45 degree angle?

Using E6010 in the 3G position what is the maximum electrode diameter?

The recommended nominal thickness of backing bars for the GMAW process is

What percentage of wire feed speed would require a WPS requalification for the FCAW process?

What is the minimum fillet weld size requirement for welding a 7/8" stud?