One of the most expensive methods of volume control for an air system is the __________.
a) direct drive
b) v-belt drive
c) variable inlet vane control
d) outlet damper control
e) variable speed motor control
Answer: E
One of the most expensive methods of volume control for an air system is the __________.
a) direct drive
b) v-belt drive
c) variable inlet vane control
d) outlet damper control
e) variable speed motor control
Answer: E