Author Question: The formula for determining the static available for the duct system is: A) Available duct static ... (Read 169 times)

Lobcity · **on:** Jul 24, 2018

The formula for determining the static available for the duct system is:

A) Available duct static = total available static - total fixed static losses.
B) Available duct static = total fixed static losses.
C) Available duct static = 0.15 to 0.2 in WC.
D) Total available duct static = 0.1 in WC.

Question 2

How is the water flow in a hydronic heating system checked?

A) By measuring the impeller RPM using a stroboscope
B) By measuring the pressure drop across the water pump and comparing it to a pumping performance chart
C) By measuring the amp draw of the pump motor and applying the formula gp = amps 1.73
D) By measuring the pump motor RPM using a digital tachometer