Author Question: Compared to the over-fire draft, the stack draft should be: A) More negative than the over-fire ... (Read 133 times)

gonzo233 · **on:** Jul 24, 2018

Compared to the over-fire draft, the stack draft should be:

A) More negative than the over-fire draft. B) About the same as the over-fire draft.
C) A positive pressure. D) Less negative than the over-fire draft.

Question 2

Why is minimizing duct restriction so important?

A) The system cannot operate properly against excessive air restriction.
B) Incorrect terminal velocities can cause discomfort.
C) Excessive restriction can increase operating cost.
D) Excessive restriction causes excessive noise.