Which of the following test instruments provides direct readings in feet per minute?

The instrument that provides direct readings in feet per minute is the anemometer. An anemometer is specifically designed to measure the speed of airflow. This tool is widely used in HVAC applications to assess and ensure proper air distribution within a space. The reading of airflow in feet per minute helps technicians evaluate whether the desired air velocity is being achieved, which is crucial for maintaining comfort levels and efficiency in heating and cooling systems.

In contrast, the other instruments listed do not serve this function: a manometer measures pressure differences within ducts, a barometer measures atmospheric pressure, and a pyrometer is used to measure high temperatures. Understanding the specific functions of these instruments allows professionals to select the right tool for the job when assessing air distribution systems.