Author Question: When installing units requiring three-phase power, the voltages between any two power leads must be: ... (Read 73 times)

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

When installing units requiring three-phase power, the voltages between any two power leads must be:

A) Within 10 percent of each other. B) Within 3 percent of each other.
C) Exactly the same. D) Within 15 percent of each other.

Question 2

How does a power burner differ from an atmospheric burner?

A) A power burner uses air forced into the combustion area by a fan.
B) Power burners are primarily for residential use.
C) An atmospheric burner has a fan used to force air into combustion.
D) Atmospheric burners are rarely used today.