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15 Questions

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Industrial Maintenance Tasks

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Questions and Answers

What is a common maintenance task for which operators are responsible?

Cleaning the boiler water level control system

Blowing down drip legs (correct)

Checking the steam trap installation

Inspecting the gauge glass isolation valves

When is drip leg blowdown commonly done?

Each shift (correct)

Once a day

Once a week

Once a month

What is the purpose of blowing down drip legs?

To clean the gauge glass isolation valves

To remove excess accumulations of condensate (correct)

To increase the pressure in the steam system

To test the secondary method of monitoring boiler water level

When can gauge glass valve stem leaks be repaired?

While the boiler is on-line Signup and view all the answers

What should be confirmed before proceeding with gauge glass blowdowns?

The functioning of the secondary method of monitoring boiler water level Signup and view all the answers

What should be closed during gauge glass blowdowns?

Both the steam side and waterside gauge glass isolation valves Signup and view all the answers

What should be done if the gauge glass cannot be suitably isolated during blowdowns?

Stop the blowdown immediately and call for help Signup and view all the answers

What is the first step to be taken once the boiler is depressurized?

Tighten the valve packing nuts Signup and view all the answers

What is the precaution before tightening the packing on a valve?

Depressurize the piping around the valve Signup and view all the answers

What should be ensured while tightening the packing gland nuts on a valve?

The gland remains perpendicular to the stem Signup and view all the answers

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 Signup and view all the answers

What is the purpose of a stuffing box in a centrifugal pump?

To allow a continuous flow between the shaft and packing Signup and view all the answers

What happens if the leakage in a centrifugal pump's stuffing box is completely stopped?

The packing will overheat and damage the pump shaft Signup and view all the answers

Why is it important to tighten valve packing nuts only once the boiler is depressurized?

To avoid injury from failed packing and flange gaskets Signup and view all the answers

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 Signup and view all the answers