Babcock & Wilcox boiler — classification check Verify the statement: “A Babcock and Wilcox boiler is a stationary water-tube boiler.”

Introduction / Context:
Babcock & Wilcox is an archetypal water-tube boiler used where higher pressures, faster steaming, and safer large capacities are required. Recognizing its category is basic boiler literacy.

Given Data / Assumptions:

• Inclined water tubes connecting headers and a steam drum.
• Combustion external to tubes; hot gases wash over tube banks.
• Fixed installation in power or process plants.

Concept / Approach:
Water-tube boilers carry water/steam inside tubes with hot gases outside, enabling higher operating pressures than shell fire-tube types. The Babcock & Wilcox arrangement is standard, horizontal/stationary, with superheater/economiser add-ons in many plants.

Step-by-Step Solution:

Verification / Alternative check:
Manufacturer literature and textbooks consistently depict B&W as a stationary water-tube unit, often used for high-pressure service.

Why Other Options Are Wrong:

• Fire-tube claim: reverses the role of gas and water paths.
• Marine/vertical caveats: special-purpose designs exist, but the canonical B&W studied in fundamentals is stationary and horizontal.

Common Pitfalls:
Equating “water-tube” with “water-wall” only; overlooking that B&W predates modern membrane-wall furnaces yet shares the same basic flow principle.

Final Answer: