Ohio Sheet Metal Specialist Exam

Ohio Sheet Metal Specialist Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• Which type of sheet metal is most commonly used in residential

ductwork?

a) Stainless steel

b) Copper

c) Galvanized steel

d) Aluminum

Galvanized steel is preferred for residential ductwork due to its durability and resistance to corrosion.

• What is the standard gauge for residential ductwork?
• 12 gauge
• 20 gauge
• 26 gauge
• 30 gauge 1 / 4

26 gauge is the typical thickness for residential ducts, balancing strength and ease of handling.

• What is the main purpose of a sheet metal brake?

a) Cutting metal sheets

b) Bending metal sheets

c) Welding metal sheets

d) Polishing metal sheets

A brake is designed to bend sheet metal at precise angles without damaging it.

• Which joint type is commonly used to connect round duct sections?

a) Butt joint

b) Slip joint

c) Lap joint

d) Corner joint

Slip joints allow round ducts to fit into each other while maintaining airflow continuity.

• What does HVAC stand for?

a) Heating, Ventilation, and Vacuum

b) Heat, Vent, and Airflow Control

c) Heating, Ventilation, and Air Conditioning

d) Heat, Vapor, and Air Circulation

HVAC is the standard term for systems that control indoor climate and air quality. 2 / 4

• What tool is used to measure sheet metal thickness?

a) Ruler

b) Caliper

c) Micrometer

d) Tape measure

A micrometer provides precise measurements of sheet metal gauge or thickness.

• Which of the following is a primary advantage of aluminum ductwork?

a) Heavy and strong

b) Lightweight and corrosion-resistant

c) High cost

d) Difficult to fabricate

Aluminum is light, easy to work with, and naturally resistant to corrosion.

• What type of fastener is typically used for connecting duct sections?

a) Bolts and nuts

b) Sheet metal screws

c) Rivets only

d) Welding rods

Sheet metal screws provide secure connections and are easy to install on ductwork.

• What safety gear is essential when cutting sheet metal?

a) Earplugs only 3 / 4

b) Safety shoes only

c) Gloves, eye protection, and hearing protection

d) Hard hat only

Cutting sheet metal produces sharp edges, flying particles, and loud noise, requiring full PPE.

• What is the typical slope for a metal roof to allow drainage?
• 1/16 inch per foot
• 1 inch per foot
• 1/4 inch per foot
• 2 inches per foot

A 1/4 inch per foot slope is sufficient to allow water to drain off metal roofs.

• When fabricating ducts, what is the purpose of a lock seam?

a) To join insulation

b) To secure screws

c) To create a strong, airtight connection

d) To measure airflow

Lock seams provide a secure, continuous joint that reduces air leakage in ducts.

• What is the main advantage of using a hem on a sheet metal

edge?

a) Easier welding

b) Safety and strength

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