15 Questions
What is a common maintenance task for which operators are responsible?
Blowing down drip legs
When is drip leg blowdown commonly done?
Each shift
What is the purpose of blowing down drip legs?
To remove excess accumulations of condensate
When can gauge glass valve stem leaks be repaired?
While the boiler is on-line
What should be confirmed before proceeding with gauge glass blowdowns?
The functioning of the secondary method of monitoring boiler water level
What should be closed during gauge glass blowdowns?
Both the steam side and waterside gauge glass isolation valves
What should be done if the gauge glass cannot be suitably isolated during blowdowns?
Stop the blowdown immediately and call for help
What is the first step to be taken once the boiler is depressurized?
Tighten the valve packing nuts
What is the precaution before tightening the packing on a valve?
Depressurize the piping around the valve
What should be ensured while tightening the packing gland nuts on a valve?
The gland remains perpendicular to the stem
How should a cross bolting pattern be used on a bonnet or flange to prevent leaks?
Ensure that the flange or bonnet does not distort
What is the purpose of a stuffing box in a centrifugal pump?
To allow a continuous flow between the shaft and packing
What happens if the leakage in a centrifugal pump's stuffing box is completely stopped?
The packing will overheat and damage the pump shaft
Why is it important to tighten valve packing nuts only once the boiler is depressurized?
To avoid injury from failed packing and flange gaskets
What should be ensured when tightening the packing gland on a valve or pump shaft?
The gland is adjusted evenly so that it remains perpendicular to the stem/shaft
Learn about common maintenance tasks for operators including blowing down drip legs, repairing gauge glass leaks, and assessing packing leaks in a steam system.
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