You are using the static pressure drop method to check airflow. ...

[tth]

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

[mfedorka]

Answer to Question 1

B

Answer to Question 2

A

[tth]

Excellent

[duy1981999]

Gracias!