ARIZONA (AZ) R-17 STRUCTURAL STEEL AND ALUMINUM Practice Exam
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This practice exam prepares candidates for the R-17 Structural Steel and Aluminum license in Arizona. It covers structural steel and aluminum installation, welding, and fabrication techniques, as well as building code compliance. Candidates will be tested on their ability to work with steel and alu...
1. Which personal protective equipment (PPE) is essential when welding
structural steel?
A. Safety goggles
B. Welding helmet
C. Earplugs
D. Both A and B
Answer: D. Both A and B
Explanation: Welding helmets protect the eyes and face from intense light and sparks, while
safety goggles offer additional eye protection. Earplugs are not typically essential unless in a
particularly noisy environment.
2. What is the primary purpose of proper ventilation during welding
operations?
A. To keep the workspace cool
B. To remove harmful fumes and gases
C. To supply oxygen for combustion
D. To reduce noise levels
Answer: B. To remove harmful fumes and gases
Explanation: Proper ventilation is crucial to remove hazardous fumes and gases produced
during welding, ensuring the safety and health of the welder and others in the vicinity.
3. In the AWS welding symbols, what does a horizontal line on the tail side of
the symbol indicate?
A. No additional information
B. Supplemental symbols or instructions
C. The welding process to be used
D. The size of the weld
Answer: B. Supplemental symbols or instructions
Explanation: Horizontal lines on the tail side of welding symbols provide supplementary
information such as welding procedures, specifications, or additional instructions.
4. Which welding process is most commonly used for welding structural steel?
A. Gas Tungsten Arc Welding (GTAW)
B. Shielded Metal Arc Welding (SMAW)
C. Gas Metal Arc Welding (GMAW)
D. Submerged Arc Welding (SAW)
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, ARIZONA (AZ) R-17 STRUCTURAL STEEL AND ALUMINUM
Answer: C. Gas Metal Arc Welding (GMAW)
Explanation: GMAW, also known as MIG welding, is widely used for structural steel due to
its efficiency, speed, and ability to produce high-quality welds.
5. What is the significance of the American Welding Society (AWS) D1.1
standard?
A. It covers welding procedures for aluminum
B. It provides guidelines for welding structural steel
C. It regulates welding certifications
D. It sets safety standards for welding equipment
Answer: B. It provides guidelines for welding structural steel
Explanation: AWS D1.1 is the structural welding code for steel, outlining standards and
guidelines for welding structural steel to ensure safety and integrity in construction.
6. When welding aluminum, why is it important to use a spool gun?
A. To increase welding speed
B. To reduce wire feeding issues
C. To enhance weld penetration
D. To minimize spatter
Answer: B. To reduce wire feeding issues
Explanation: Aluminum wire is soft and can cause feeding problems in standard MIG guns.
A spool gun helps in feeding the wire smoothly, improving weld quality.
7. What is the primary difference between SMAW and GMAW welding
processes?
A. SMAW uses a continuous wire feed
B. GMAW uses consumable electrodes
C. SMAW requires a shielding gas
D. GMAW typically has higher deposition rates
Answer: D. GMAW typically has higher deposition rates
Explanation: GMAW generally offers higher deposition rates compared to SMAW, making
it more efficient for large-scale structural welding projects.
8. Which type of electrode is commonly used for welding mild steel in the
SMAW process?
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, ARIZONA (AZ) R-17 STRUCTURAL STEEL AND ALUMINUM
A. E6010
B. E7018
C. E308
D. E4043
Answer: B. E7018
Explanation: E7018 electrodes are low-hydrogen rods commonly used for welding mild
steel, providing strong, ductile welds with good impact properties.
9. What is the purpose of preheating steel before welding?
A. To clean the surface
B. To reduce thermal shock
C. To increase the welding speed
D. To change the color of the metal
Answer: B. To reduce thermal shock
Explanation: Preheating helps to minimize the risk of cracking by reducing the temperature
gradient between the weld area and the base metal, thereby reducing thermal shock.
10. Which welding position is generally considered the most challenging?
A. Flat
B. Horizontal
C. Vertical
D. Overhead
Answer: D. Overhead
Explanation: Overhead welding is challenging due to gravity acting on the molten weld
pool, making it difficult to control and requiring advanced technique.
11. In welding terminology, what does "porosity" refer to?
A. Cracks in the weld
B. Incomplete fusion between weld and base metal
C. Presence of gas pockets in the weld
D. Excessive spatter
Answer: C. Presence of gas pockets in the weld
Explanation: Porosity refers to small gas pockets or voids within the weld, which can
weaken the joint and reduce its integrity.
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, ARIZONA (AZ) R-17 STRUCTURAL STEEL AND ALUMINUM
12. What is the recommended shielding gas for welding aluminum using
GMAW?
A. Pure CO2
B. 75% Argon / 25% CO2
C. 100% Argon
D. Helium
Answer: C. 100% Argon
Explanation: 100% Argon is typically used for MIG welding aluminum as it provides stable
arc characteristics and adequate shielding to protect the weld pool.
13. Which factor is NOT typically considered when selecting a welding
process for structural steel?
A. Material thickness
B. Position of welding
C. Color of the metal
D. Production speed
Answer: C. Color of the metal
Explanation: The color of the metal does not influence the selection of a welding process.
Material thickness, welding position, and production speed are critical factors.
14. What is the main advantage of using flux-cored wire in GMAW for
structural steel?
A. It requires no shielding gas
B. It produces cleaner welds
C. It allows for welding in windy conditions
D. It increases the welding speed
Answer: A. It requires no shielding gas
Explanation: Flux-cored wire contains flux within the core, eliminating the need for an
external shielding gas, making it suitable for outdoor or windy environments.
15. What does "duty cycle" refer to in welding equipment?
A. The frequency of welds per hour
B. The percentage of time the equipment can operate at a given amperage
C. The lifespan of the welding machine
D. The speed at which the electrode feeds
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