Quiz on Sheet Metal Mechanics

When installing flexible duct, the support strap must be a minimum of _____ wide to avoid tearing the duct.

• ¼ inch

• ½ inch

• 1 inch

• 2 inches

The acronym for CFM on a mechanical drawing indicates _____.

• Constant Fan Monitoring

• Concentric Fan Module

• Cubic Feet per Minute

• Cost Free Maintenance

A Pittsburg lock is ______.

• A longitudinal seam used to assemble sides of duct together

• Used to hold turn vanes together

• Used to hold round pipe together

• Not used in the industry

The multiplier used to determine the amount of duct needed between two 45-degree elbows is _____.

• 4.141

• 1.154

• 1.141

• 1.414

The acronym V.A.V. indicates ______.

• Voice Activated Volume

• Volume Air Verification

• Velocity and Volume

• Variable Air Volume

The length of the stretch-out for a cylinder development is equal to ______.

• The area of the cylinder

• The circumference of the cylinder

• The volume of the cylinder

• The length of the cylinder

Which of the following methods is used to determine equipment size, capacity, and location when evaluating a structure?

• Ballpark sizing

• Heat gain/loss analysis

• Internal factors analysis

• Static regain analysis

Reducing the height of a change joint transition requires ____ its width.

• No change to

• An increase of

• A decrease of

• A table to determine

In Class B sealed duct, ______ are sealed for the 3 inches wg pressure class.

Combination of fire and smoke dampers can be either of the ______ type or the ______ type.