Air for combustion is bypassed around the...

Question 1 / 270705eccefa0bacbc34ba4d46ed0

Question 1 of 270705eccefa0bacbc34ba4d46ed0

Air for combustion is bypassed around the boiler air heater when the __________.

Question 1 of 27070

Air for combustion is bypassed around the boiler air heater when the __________.

🔍 Key Concepts

• boiler air heater purpose and how it affects efficiency and metal temperatures • conditions when you might want to reduce heat absorption from flue gas to or from incoming air • operating situations where hot surfaces or ash/soot deposits can be a damage or fire risk

💭 Think About

• Ask yourself: in which option would routing ALL combustion air through the air heater be undesirable or potentially harmful to the equipment? • Which operating condition is most likely to involve heavy soot/ash movement or changing gas paths through the boiler? • Under what circumstance would you deliberately sacrifice some efficiency to protect hardware or maintain safe operation?

✅ Before You Answer

• Identify which choice relates directly to soot/ash movement or deposition around the air heater surfaces. • Consider which options are just normal operating modes where you usually want maximum efficiency from the air heater. • Verify which situation would most likely make you concerned about overheating or burning off soot deposits on hot air‑heater surfaces.

Question 1 of 27070

Air for combustion is bypassed around the boiler air heater when the __________.

soot blowers are operating

control desuperheater is operating

combustion control system is in manual

boiler is steaming at low rates

Question 1 / 270705eccefa0bacbc34ba4d46ed0

Question 1 of 270705eccefa0bacbc34ba4d46ed0

Air for combustion is bypassed around the boiler air heater when the __________.

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Question 1 of 27070

Air for combustion is bypassed around the boiler air heater when the __________.