What fastener is commonly used with round flexible duct?

The atmosphere exerts a pressure of ____ at standard atmospheric conditions.

The simple way to check for airflow is to see if you can feel the airflow at a distance of about ____ from each register.

Duct systems can be plenum, extended plenum, reducing plenum, or perimeter loop.

One reason for using an extended plenum system is to ____.

The duct pressure equals the velocity pressure plus static pressure.

Airflow pressure in ductwork is measured in inches of ____.

To fasten a duct hanger strap to a floor joist, the nail used would be a ____.

To secure a flexible duct onto a duct collar, the best fastener would be a(n) ____.

For fastening two pieces of rough lumber together, the nail used would be a ____.