Which of the following components may be...

🔍 Key Concepts

• Note where the exhaust gas path enters the waste heat boiler and how it flows past the internal tube bank at location B. • Think about which listed components must be in direct contact with, or very close to, the hot gas side of the boiler casing rather than mounted on the steam drum shell. • Recall the usual mounting location for a water level indicator, a mechanical burner, a soot blower, and a flue gas pyrometer on a marine boiler.

💭 Think About

• Look closely at how location B is drawn: Is it inside the gas pass, on the furnace front, or attached on the outside of the steam drum? • For each choice, ask yourself: does this device need to cover a wide area across many tubes, or is it a small, localized instrument/attachment? • Consider which of the options is normally arranged in rows across the tube bank to act on the heating surfaces exposed to exhaust gas.

✅ Before You Answer

• Verify whether a boiler water level indicator is ever installed deep inside the gas pass like B, instead of on the outside of the steam drum where an operator can see it. • Check where an oil‑fired mechanical burner is typically found in a boiler: near the furnace front/bottom vs. up in the convective tube bank. • Confirm which item—soot blower or pyrometer—is usually arranged along the tube banks in the gas path to keep heating surfaces clean.

Which of the following components may be installed at location "B", as shown in the illustration? See illustration MO-0128.

Boiler water level indicator

Oil fired mechanical burner

Boiler soot blower unit

Flue gas pyrometer

🔍 Key Concepts

💭 Think About

✅ Before You Answer