TEST BANK
CWB LEVEL 2
CLOSED BOOK EXAM
Questions & Answers
TEST BANK
,Table of Contents
Module 01: PROC-303 — Welding Processes & Equipment .......................................... 2
Module 02: PSFW-301 Power Sources for Welding ..................................................... 11
Module 03: Electrodes & Consumables ........................................................................ 20
Module 04 RSDI-301 — Residual Stress and Distortion .............................................. 30
Module 05: Review of Physical Metallurgy................................................................... 39
Module 06: METL-303 — Introduction to Welding Metallurgy of Steel ....................... 49
Module 07: Welding Metallurgy of Stainless Steels ..................................................... 59
Module 08 MTWL-301 — Mechanical Testing of Welds .............................................. 69
Module 09: SURF-301 Surface Inspection ................................................................... 78
Module 10: RADI-301 Radiographic Inspection ........................................................... 88
Module 11: ULTR-301 — Ultrasonic Inspection ........................................................... 97
,Module 01: PROC-303 — Welding Processes & Equipment
1. What is the typical arc efficiency range for the Shielded Metal Arc Welding (SMAW)
process?
a. 30% to 50%
b. 50% to 85%
c. 80% to 90%
d. 90% to 99%
ANS: b.
2. Which shielding gas mixture is suitable for achieving spray transfer when welding
with 1.1 mm diameter GMAW ER49S-6 wire?
a. 100% CO2
b. 50% Argon - 50% CO2
c. 5% CO2 - 95% Argon
d. 100% Helium
ANS: c.
Rationale: Spray transfer in GMAW requires an Argon-rich mixture, such as the
specified 5% CO2 and 95% Argon ratio.
3. How is a ball formed on the end of a pure tungsten electrode when welding
aluminum using the Gas Tungsten Arc Welding (GTAW) process?
a. By grinding the tip into a hemispherical shape
b. By striking an arc on a copper block using AC or DCEP polarity
c. By increasing the gas pre-purge time
d. By using a direct current electrode negative (DCEN) setting
ANS: b.
, Rationale: Balling a pure tungsten electrode for aluminum is accomplished by striking
an arc on a copper block using AC or DCEP polarity.
4. Which of the following are recognized limitations or characteristics of the
Submerged Arc Welding (SAW) process?
a. Inability to perform out-of-position welding
b. Necessity for external shielding gas delivery
c. High deposition rate and duty cycle potential
d. Limited capability for flat position welding
ANS: a., c.
Rationale: SAW provides high productivity through high deposition rates but cannot be
used for out-of-position welding.
5. Which welding process can be utilized with or without a shielding gas depending on
the electrode type chosen?
a. Submerged Arc Welding (SAW)
b. Flux Cored Arc Welding (FCAW)
c. Gas Tungsten Arc Welding (GTAW)
d. Gas Metal Arc Welding (GMAW)
ANS: b.
Rationale: Flux Cored Arc Welding has variants that can operate with or without an
external shielding gas.
6. What is a major advantage associated with the Electron Beam Welding (EBW)
process?
a. High portability for field operations
b. Capability for full penetration on thick materials in a single pass
c. Ability to use non-shielded, low-current power sources
CWB LEVEL 2
CLOSED BOOK EXAM
Questions & Answers
TEST BANK
,Table of Contents
Module 01: PROC-303 — Welding Processes & Equipment .......................................... 2
Module 02: PSFW-301 Power Sources for Welding ..................................................... 11
Module 03: Electrodes & Consumables ........................................................................ 20
Module 04 RSDI-301 — Residual Stress and Distortion .............................................. 30
Module 05: Review of Physical Metallurgy................................................................... 39
Module 06: METL-303 — Introduction to Welding Metallurgy of Steel ....................... 49
Module 07: Welding Metallurgy of Stainless Steels ..................................................... 59
Module 08 MTWL-301 — Mechanical Testing of Welds .............................................. 69
Module 09: SURF-301 Surface Inspection ................................................................... 78
Module 10: RADI-301 Radiographic Inspection ........................................................... 88
Module 11: ULTR-301 — Ultrasonic Inspection ........................................................... 97
,Module 01: PROC-303 — Welding Processes & Equipment
1. What is the typical arc efficiency range for the Shielded Metal Arc Welding (SMAW)
process?
a. 30% to 50%
b. 50% to 85%
c. 80% to 90%
d. 90% to 99%
ANS: b.
2. Which shielding gas mixture is suitable for achieving spray transfer when welding
with 1.1 mm diameter GMAW ER49S-6 wire?
a. 100% CO2
b. 50% Argon - 50% CO2
c. 5% CO2 - 95% Argon
d. 100% Helium
ANS: c.
Rationale: Spray transfer in GMAW requires an Argon-rich mixture, such as the
specified 5% CO2 and 95% Argon ratio.
3. How is a ball formed on the end of a pure tungsten electrode when welding
aluminum using the Gas Tungsten Arc Welding (GTAW) process?
a. By grinding the tip into a hemispherical shape
b. By striking an arc on a copper block using AC or DCEP polarity
c. By increasing the gas pre-purge time
d. By using a direct current electrode negative (DCEN) setting
ANS: b.
, Rationale: Balling a pure tungsten electrode for aluminum is accomplished by striking
an arc on a copper block using AC or DCEP polarity.
4. Which of the following are recognized limitations or characteristics of the
Submerged Arc Welding (SAW) process?
a. Inability to perform out-of-position welding
b. Necessity for external shielding gas delivery
c. High deposition rate and duty cycle potential
d. Limited capability for flat position welding
ANS: a., c.
Rationale: SAW provides high productivity through high deposition rates but cannot be
used for out-of-position welding.
5. Which welding process can be utilized with or without a shielding gas depending on
the electrode type chosen?
a. Submerged Arc Welding (SAW)
b. Flux Cored Arc Welding (FCAW)
c. Gas Tungsten Arc Welding (GTAW)
d. Gas Metal Arc Welding (GMAW)
ANS: b.
Rationale: Flux Cored Arc Welding has variants that can operate with or without an
external shielding gas.
6. What is a major advantage associated with the Electron Beam Welding (EBW)
process?
a. High portability for field operations
b. Capability for full penetration on thick materials in a single pass
c. Ability to use non-shielded, low-current power sources
