Arizona Driving Permit Written Practice Exam

What is boiler blowdown?

Blowing air into the furnace Discharging water from the boiler to reduce dissolved solids and sludge Releasing excess steam pressure Cooling the boiler down quickly

Correct Answer:

Discharging water from the boiler to reduce dissolved solids and sludge

Explanation:

Blowdown controls the concentration of dissolved and suspended solids in boiler water to prevent scale and foaming.

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