Sheet Metal Worker Journeyman
Licensing Practice Examination 100
Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A Instant Download Pdf
1. What does a lower sheet metal gauge number indicate?
A. Thinner metal
B. Softer metal
C. Thicker metal
D. More corrosion-resistant metal
Lower gauge numbers correspond to thicker sheet metal; for example, 22-
gauge is thicker than 26-gauge.
2. Which tool is specifically designed to make curved cuts in sheet metal?
A. Straight tin snips
B. Aviation snips
C. Hacksaw
D. Cold chisel
Aviation snips are available in left-cut, right-cut, and straight-cut
configurations for cutting curves and angles in sheet metal.
3. What is the primary purpose of a Pittsburgh lock seam?
A. To provide a decorative finish
B. To join round duct sections
C. To join rectangular duct sections securely
D. To attach insulation
,The Pittsburgh lock is a mechanical seam used to join flat rectangular duct
sections and provides strength and rigidity.
4. Which metal is most commonly used for HVAC ductwork because of its
balance of corrosion resistance, strength, and cost?
A. Copper
B. Aluminum
C. Galvanized steel
D. Stainless steel
Galvanized steel is widely used in HVAC duct systems because the zinc coating
provides corrosion resistance at a relatively low cost.
5. When welding, brazing, or torch-cutting galvanized steel, what hazard is
created by the zinc coating?
A. Hydrogen embrittlement
B. Metal fume fever
C. Lead poisoning
D. Silicosis
Heating galvanized steel vaporizes the zinc coating; inhaling zinc oxide fume
causes metal fume fever, so the coating should be removed from the weld
zone and ventilation or respiratory protection used.
6. What is the minimum point-of-operation guarding requirement for a press
brake under OSHA general machine guarding rules?
A. A warning sign only
B. A guard or device that prevents hands from entering the point of operation
C. A trained operator only
D. Reduced tonnage
OSHA 1910.212(a)(3)(ii) requires point-of-operation guarding on machines
such as press brakes to prevent employees from contacting the danger zone.
, 7. Which layout method is best suited for developing a pattern for a square-
to-round transition?
A. Parallel-line development
B. Radial-line development
C. Triangulation
D. Simple stretch-out
Triangulation divides an irregular surface into a series of triangles and is used
for transitions such as square-to-round fittings.
8. What is the primary purpose of a snap-lock seam?
A. Joining rectangular duct corners
B. Joining round duct sections
C. Providing a decorative edge
D. Attaching hangers
Snap-lock seams are commonly used to join round spiral duct sections and
allow quick assembly.
9. Which SMACNA pressure class is commonly used as the minimum basis for
low-pressure ductwork when no other class is specified?
A. ½-inch w.g.
B. 1-inch w.g.
C. 3-inch w.g.
D. 10-inch w.g.
SMACNA uses 1-inch water gauge (250 Pa) as a common low-pressure basis
when the designer does not specify a pressure class.
10. What is the maximum sheet metal thickness covered by AWS D9.1, Sheet
Metal Welding Code?
A. 10 gauge
B. 6 gauge
Licensing Practice Examination 100
Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A Instant Download Pdf
1. What does a lower sheet metal gauge number indicate?
A. Thinner metal
B. Softer metal
C. Thicker metal
D. More corrosion-resistant metal
Lower gauge numbers correspond to thicker sheet metal; for example, 22-
gauge is thicker than 26-gauge.
2. Which tool is specifically designed to make curved cuts in sheet metal?
A. Straight tin snips
B. Aviation snips
C. Hacksaw
D. Cold chisel
Aviation snips are available in left-cut, right-cut, and straight-cut
configurations for cutting curves and angles in sheet metal.
3. What is the primary purpose of a Pittsburgh lock seam?
A. To provide a decorative finish
B. To join round duct sections
C. To join rectangular duct sections securely
D. To attach insulation
,The Pittsburgh lock is a mechanical seam used to join flat rectangular duct
sections and provides strength and rigidity.
4. Which metal is most commonly used for HVAC ductwork because of its
balance of corrosion resistance, strength, and cost?
A. Copper
B. Aluminum
C. Galvanized steel
D. Stainless steel
Galvanized steel is widely used in HVAC duct systems because the zinc coating
provides corrosion resistance at a relatively low cost.
5. When welding, brazing, or torch-cutting galvanized steel, what hazard is
created by the zinc coating?
A. Hydrogen embrittlement
B. Metal fume fever
C. Lead poisoning
D. Silicosis
Heating galvanized steel vaporizes the zinc coating; inhaling zinc oxide fume
causes metal fume fever, so the coating should be removed from the weld
zone and ventilation or respiratory protection used.
6. What is the minimum point-of-operation guarding requirement for a press
brake under OSHA general machine guarding rules?
A. A warning sign only
B. A guard or device that prevents hands from entering the point of operation
C. A trained operator only
D. Reduced tonnage
OSHA 1910.212(a)(3)(ii) requires point-of-operation guarding on machines
such as press brakes to prevent employees from contacting the danger zone.
, 7. Which layout method is best suited for developing a pattern for a square-
to-round transition?
A. Parallel-line development
B. Radial-line development
C. Triangulation
D. Simple stretch-out
Triangulation divides an irregular surface into a series of triangles and is used
for transitions such as square-to-round fittings.
8. What is the primary purpose of a snap-lock seam?
A. Joining rectangular duct corners
B. Joining round duct sections
C. Providing a decorative edge
D. Attaching hangers
Snap-lock seams are commonly used to join round spiral duct sections and
allow quick assembly.
9. Which SMACNA pressure class is commonly used as the minimum basis for
low-pressure ductwork when no other class is specified?
A. ½-inch w.g.
B. 1-inch w.g.
C. 3-inch w.g.
D. 10-inch w.g.
SMACNA uses 1-inch water gauge (250 Pa) as a common low-pressure basis
when the designer does not specify a pressure class.
10. What is the maximum sheet metal thickness covered by AWS D9.1, Sheet
Metal Welding Code?
A. 10 gauge
B. 6 gauge
