Author Question: What materials are boilers commonly made from? A) Most boilers are either cast iron or brass B) ... (Read 90 times)

lak · **on:** Jul 26, 2018

What materials are boilers commonly made from?

A) Most boilers are either cast iron or brass B) Most boilers are either aluminum or copper
C) Most boilers are either steel or aluminum D) Most boilers are either cast iron or steel

Question 2

What kind of expansion tank must be installed above the highest terminal unit?

A) diaphragm-type B) closed-type
C) pressure-relief type D) open-type