A boiler inspection:
Must be done when the boiler inspector requests it.
A relatively new and safer chemical used in boiler cleaning and treatment is:
Chelates.
A boiler has been in operation for one year and is now taken off the line for cleaning, repair and inspection. The boiler is one of three in a battery and the other two will remain in operation. This one boiler is to be drained and cooled. Before any pers
Main steam, blow down and feedwater valves be closed, chained and tagged.
An inhibitor, when added to acid, will:
Minimise the effect the acid has on the metal.
For what hydrostatic test pressure is a closed expansion tank on a hot water heating system designed for?
2 1/2 times.
One of the main purposes of an external inspection is to:
Observe operation and maintenance practice.
Just before entering the waterside of the boiler it is important to:
Test the atmosphere with an O2 "sniffer".
What is the water pressure a boiler is subject to, when a hydrostatic test is being carried out?
1 1/2 times normal operating pressure.
A hydrostatic test on a high-pressure steam boiler:
Must be done on a new boiler.
The most popular acid for boiler cleaning is:
Hydrochloric
The external inspection of a boiler:
May include making sure the valves are in good operating condition.
When shutting down a boiler for internal cleaning, you should:
Allow it to cool, then drain, open up and flush.
Chemical cleaning of smaller boilers is not usually done because:
The cost to do so is not warranted or justified.
When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to:
Prevent a vacuum from forming in the boiler.
One of the legal responsibilities of the engineer during an inspection is:
Point out any known or suspected defects to the inspector.
When the boiler is removed from service, it can be drained once the temperature reaches approximately:
90�C.
For an alkaline boil out, the boiler is maintained at a desired steam pressure for about:
48 hours.
Before cleaning the waterside and as far as is possible:
A visual inspection of pressure parts should be completed.
A hydrostatic test should be applied to a boiler:
At the request of the boiler inspector.
The recommended procedures for a boiler inspection are stated in the:
ASME Boiler and Pressure Vessel Code, Section VII.