Red Seal Sheet Metal Worker Practice Exam

What type of fitting is commonly used to turn corners in ductwork?

1. Elbow fittings

2. Tees

3. Reducers

4. Couplings

The correct answer is: Elbow fittings

Elbow fittings are specifically designed for changing the direction of airflow in ductwork, which is essential when constructing a system that needs to navigate around corners or obstacles. These fittings can come in various degrees of bend, commonly in 90-degree or 45-degree angles, allowing for versatile adjustments in direction without significantly disrupting the airflow. In contrast, tees are used primarily to create a branch off a main duct line, accommodating a split in flow rather than a directional change. Reducers are utilized to connect ducts of different diameters, facilitating a transition between sizes but not serving the purpose of changing direction. Couplings are used to join two sections of ductwork, providing a connection but not affecting direction. Thus, elbow fittings are the most appropriate choice for turning corners in ductwork.