To change the nature of hard creosote deposits the most
common method is the issue of __________.
Chemicals
The most difficult brush to reverse in the flue is __________.
Flat wire brush
,
Air is blown into a mask or hood when you use a _________
respirator.
Positive
Sweeps choose aluminum ladders over fiberglass because
they are __________ and__________.
Lighter;
less expensive
,
Sweeps should use polypropylene brushes to sweep oil
flues because they are __________.
Resistant to corrosion
The primary tool for dust control is the __________.
Vacuum