Author Question: Why don't variable-air-volume zone systems need any method of controlling excess air? A) Any ... (Read 162 times)

urbanoutfitters · **on:** Jul 24, 2018

Why don't variable-air-volume zone systems need any method of controlling excess air?

A) Any excess air is automatically diverted outside.
B) All the dampers pass a little air, even when they are closed.
C) They reduce the system airflow to match the number of zones calling.
D) The fans used are not capable of producing excess air.

Question 2

What type of oil delivery system is recommended when the vacuum required for lifting the oil from the tank to the furnace is 16 in Hg?

A) A two-pipe oil delivery system with a single-stage oil pump
B) A single-pipe oil delivery system with a single-stage pump
C) A two-pipe oil delivery system with a two-stage oil pump
D) A single-pipe oil delivery system with a two-stage oil pump