Author Question: You are using the static pressure drop method to check airflow. After making an adjustment to the ... (Read 105 times)

tth · **on:** Jul 24, 2018

You are using the static pressure drop method to check airflow. After making an adjustment to the system airflow, the static pressure drop across the coil increases. This indicates that:

A) The evaporator coil became clogged during the adjustment period.
B) The airflow has increased.
C) Static pressure drop is not a reliable way to check system airflow.
D) The airflow has decreased.

Question 2

How are water pumps in hydronic heating systems checked?

A) By measuring the water flow in the system
B) By measuring the pump motor RPM using a digital tachometer
C) By measuring the impeller RPM using a stroboscope
D) By measuring the temperature of the pump motor