Block 2 - Maintain Boilers & Ancillary Equipment Self Assessment Flashcards
What should be done if deposits are not fully removed by flushing during an inspection?
Consult the boiler manufacturer’s authorized representative
What is a proper procedure when performing a pop test on a safety valve?
Allow the valve to open and reseat under normal service conditions
Who is responsible for ensuring a boiler is maintained and inspected?
The equipment owner and operator
What is the maximum amount of time between an internal inspection for steam boilers?
Every 2 years
How often should the pressure vessel waterside be inspected after the initial three-month inspection?
Every 6, 9, or 12 months depending on conditions
What should be checked during an external boiler inspection?
1) Piping connections for leaks
2) Signs of flue gas condensation
3) Painted surfaces for gasket failures
In extreme cases, what method may be necessary to remove scale buildup?
Acid cleaning
What issue can extreme scale buildup cause in watertube boilers, particularly in coil tube designs?
Impeded water flow
Why should a boiler be cooled gradually during shutdown?
To avoid damaging temperature differentials and harmful stresses
Who is typically present during an internal waterside inspection?
The water treatment specialist and the owner/operator
What is the primary reason for maintaining a boiler on a regular schedule?
To maintain boiler safety and efficiency
What is the main cause of deterioration in the pressure vessel?
Improper water treatment
What is the recommended action after inspecting the low water cut-off (LWCO) head(s)?
Remove all sludge and scale
Why should serviced safety valves not be stored on shelves for long periods?
The serviced date is time-sensitive
What is a sign of combustion issues on the fireside of a firetube boiler?
Flame impingement and soot deposits
What should be done after cleaning the waterside of a boiler?
Replace all waterside handhole and manhole gaskets
What is the primary consequence of scale formation in firetube boilers?
Overheating of boiler metal
Where is scaling most likely to be observed in a boiler system?
At the point where feedwater enters the boiler
What should be checked when installing gaskets and sealing materials?
Ensure proper alignment and smooth application of the pulp layer
What is a sign of active oxygen corrosion?
Black iron oxide or shiny metal under a reddish-brown cap
What is a key function of a boiler inspection?
To provide assurance of equipment integrity and minimize safety issues
What is the preferred method for long-term boiler storage?
Dry layup with complete drainage and ventilation
What does excessive sludge deposit in a firetube boiler indicate?
Hard water intrusion or insufficient bottom blowdown
What should be done if the refractory liner in the furnace shows signs of deterioration?
Perform a full replacement if necessary, following the manufacturer’s instructions
What should be done before entering a boiler for inspection?
1) Notify operators and workers
2) Lockout/tagout online valves
3) Test oxygen levels and ensure proper ventilation
