Author Question: Sealed combustion oil furnaces use A) Special sealed air-tight barometric draft regulators B) A ... (Read 33 times)

Pea0909berry · **on:** Jul 27, 2018

Sealed combustion oil furnaces use

A) Special sealed air-tight barometric draft regulators
B) A separate bottled oxygen supply for cleaner combustion
C) No vent because the combustion chamber is sealed
D) High static oil burners

Question 2

The best method to prepare a cast iron weld joint is:

A) Machining B) Grinding C) Sawing D) All of the above