100+ Free GMAW NC II Practice Questions

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Key Facts: GMAW NC II Exam

₱3,361

Assessment Fee

TESDA Circular 072-2021

MIG/GMAW

Process

Competency

Passing Standard

TESDA

5 years

NC Validity

TESDA

TESDA GMAW NC II certifies MIG welders for carbon steel pipe work. Assessment is competency-based with written and practical parts. Fee ₱2,925 (Jan 2021 schedule).

Sample GMAW NC II Practice Questions

Try these sample questions to test your GMAW NC II exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What does GMAW stand for in TESDA welding qualifications?

A.Gas Metal Arc Welding

B.Gas Manual Arc Welding

C.General Metal Alloy Welding

D.Grounded Metal Arc Welding

Explanation: GMAW is Gas Metal Arc Welding, commonly called MIG welding. A continuously fed solid wire electrode melts in an arc shielded by external gas.

2In carbon steel pipe GMAW, which shielding gas mixture is most commonly specified for balanced arc stability and penetration?

A.75% argon / 25% CO₂ (C-25)

B.100% oxygen

C.100% acetylene

D.50% nitrogen / 50% helium

Explanation: A 75/25 argon-CO₂ blend (C-25) is widely used on carbon steel because argon stabilizes the arc while CO₂ increases penetration and wetting.

3What is the primary purpose of shielding gas in GMAW pipe welding?

A.Protect the molten weld pool and arc from atmospheric oxygen and nitrogen

B.Cool the weld bead rapidly to increase hardness

C.Replace the need for a filler wire electrode

D.Generate slag that floats on top of the weld

Explanation: Shielding gas displaces air around the arc and pool, preventing oxidation, porosity, and nitrogen absorption in the weld metal.

4ER70S-6 is a common solid wire for carbon steel GMAW. What does the "70" indicate?

A.Minimum tensile strength of the deposited weld metal of 70,000 psi

B.The wire diameter is 0.070 inches

C.The wire contains 70% copper

D.The wire must be used at 70 amperes minimum

Explanation: In AWS filler classifications, the first two digits after ER give minimum tensile strength in thousands of psi; 70 means 70 ksi (about 480 MPa).

5Which GMAW metal transfer mode uses low current and voltage so the wire repeatedly short-circuits into the weld pool?

A.Short-circuiting (dip) transfer

B.Spray transfer

C.Globular transfer

D.Submerged arc transfer

Explanation: Short-circuiting transfer occurs at low heat input; the wire touches the pool, arcs, and repeats—ideal for thin pipe and out-of-position work.

6Spray transfer in GMAW is generally preferred for thick carbon steel pipe in which position?

A.Flat or horizontal (e.g., 1G/2G) where gravity assists the pool

B.Overhead only (4G) on thin sheet

C.Vertical down on open-root pipe without backing

D.Any position because spray has the lowest heat input

Explanation: Spray transfer needs higher current and voltage, producing high heat and fluid pools best controlled in flat or horizontal pipe positions like 2G.

7Globular transfer in GMAW is generally avoided for quality pipe welds because it tends to produce:

A.Large irregular droplets, high spatter, and poor bead control

B.The deepest penetration with the least spatter

C.A perfectly smooth bead with no fusion issues

D.Zero heat input suitable for thin wall pipe

Explanation: Globular mode sits between short-circuit and spray; droplets are large and erratic, causing spatter and inconsistent fusion unsuitable for coded pipe work.

8Pulsed GMAW (GMAW-P) is advantageous for carbon steel pipe because it:

A.Alternates high-energy spray pulses with a lower background current to control heat in position welds

B.Eliminates the need for any shielding gas

C.Uses a flux-cored wire only

D.Operates without a welding power source

Explanation: Pulsed transfer combines spray-like deposition with reduced average heat, helping control the pool in 5G/6G pipe without excessive distortion.

9Pure CO₂ as a GMAW shielding gas on carbon steel typically produces:

A.Deeper penetration and higher spatter than argon-rich mixes

B.A completely inert arc with no oxidation

C.The softest arc ideal for thin sheet only

D.No need to adjust voltage or wire feed speed

Explanation: CO₂ is an active gas that increases arc energy and penetration but creates more spatter and a harsher arc than argon blends.

10The "S" in ER70S-6 indicates the filler is:

A.A solid wire electrode

B.A self-shielded flux-cored wire

C.A submerged-arc granular flux

D.A stick (SMAW) coated electrode

Explanation: In AWS designations, S means solid wire; 6 denotes higher silicon and manganese deoxidizers suited to rusty or mill-scale carbon steel.

About the GMAW NC II Exam

National GMAW/MIG welding certification practice covering shielding gases, wire selection, pipe welding knowledge, and weld quality.

Assessment

Performance-based assessment

Time Limit

4 to 8 hours

Passing Score

Competency-based

Exam Fee

₱3,361.00 (TESDA)

GMAW NC II Exam Content Outline

25%

GMAW Process & Gas Selection

Shielding gases, solid wire selection, modes of metal transfer concepts

35%

Pipe Welding Technique

Weld carbon steel pipes using GMAW to specifications

25%

Weld Quality & Defects

Visual inspection, discontinuities, and corrective actions

15%

Safety & Common Skills

Welding safety, drawings, fit-up, and shop calculations

How to Pass the GMAW NC II Exam

What You Need to Know

Passing score: Competency-based
Assessment: Performance-based assessment
Time limit: 4 to 8 hours
Exam fee: ₱3,361.00

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

GMAW NC II Study Tips from Top Performers

1Review Argon/CO2 mix concepts for carbon steel GMAW without claiming unverified exact ratios as absolute.

2Understand short-circuit vs spray transfer suitability by thickness and position.

3Drill porosity causes related to gas coverage and contamination.

4Practice interpreting WPS voltage/WFS relationships conceptually.

5Emphasize cylinder safety and hose/regulator checks.

Frequently Asked Questions

What does GMAW NC II cover?

Welding carbon steel pipes using gas metal arc welding (MIG) per drawings/WPS, with conformity references including AWS D1.1, ASME IX, API 1104, and ISO 9606-1 in TESDA welding TRs.

What is the fee?

Promulgated TESDA assessment fee ₱3,361.00 for Gas Metal Arc Welding (GMAW) NC II Full (TESDA Circular No. 072-2021, 6 Sep 2021).

Assessment methods?

Written test/questioning plus observation/demonstration with oral questioning and practical welds.

Passing standard?

Competency-based: Competent / Not Yet Competent.

Practice bank vs NC?

Practice questions prepare written knowledge only; NC requires full practical assessment.

100+ Free GMAW NC II Practice Questions

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