You are using the temperature rise method to check system airflow. After making an adjustment to the system airflow, the supply air temperature drops. This indicates that
A) The airflow has increased
B) Temperature rise is not a reliable way to check system airflow
C) The furnace was allowed to cool between adjustments
D) The airflow has decreased
Question 2
What tool is used to remove the hex head machine screws in equipment panels?
A) Adjustable wrench B) The nut driver
C) Locking pliers D) Phillips head screwdriver