Boiler mounting function check: A fitting that empties the boiler when required and discharges mud, scale, or sediment from the lowest part of the shell is called the blow-off cock. Is this identification correct?

Introduction / Context:
Boiler mountings are essential safety and control devices. The blow-off arrangement is particularly important for removing sludge and for draining the boiler during maintenance, washing, or inspection.

Given Data / Assumptions:

• Mounting located at the lowest point of the boiler water space.
• Operated under proper procedures to avoid thermal shock and erosion.
• Applicable to both fire-tube and water-tube designs with appropriate fittings.

Concept / Approach:
The blow-off cock or blow-down valve provides a direct outlet from the mud drum or lowest shell point to discharge water and settled solids. Periodic short-duration blows maintain water quality and remove sludge. For full draining, the same connection is used under controlled conditions. This function is distinct from safety valves (overpressure protection) and fusible plugs (overheat protection).

Step-by-Step Solution:
Identify location: lowest point to capture sediments.Identify function: intermittent blow-down and complete draining.Separate from other mountings: not a level control, not an overpressure device.Conclude: the description correctly matches a blow-off cock.

Verification / Alternative check:
P&IDs show blow-down lines with valves and cooling/flash arrangements leading to blow-down tanks for safe disposal.

Why Other Options Are Wrong:
Fusible plug melts on overheat; safety valve relieves pressure; neither drains sludge.

Limiting to water-tube boilers is incorrect; both main classes use blow-down devices.

Common Pitfalls:
Operating the blow-down valve for too long, risking level loss or tube exposure; blowing down at inappropriate pressures or without proper cooling arrangements.

Final Answer:
Yes