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Questions and Answers
What is the purpose of the low water fuel cut-off (LWCO) in a boiler?
What is the purpose of the low water fuel cut-off (LWCO) in a boiler?
- To regulate the fuel flow into the boiler
- To detect the level of water in the boiler and shut off the burner if the water level drops to an unsafe level (correct)
- To increase the pressure in the boiler
- To cool down the boiler system
Which type of boilers do not require low water fuel cut-offs?
Which type of boilers do not require low water fuel cut-offs?
- Electrode-type electric boilers (correct)
- High-pressure boilers
- Gas-fired boilers
- Boilers with fin tube design
What is the lowest permissible water level (LPWL) for a boiler?
What is the lowest permissible water level (LPWL) for a boiler?
- The minimum water level allowed in the boiler
- The maximum water level allowed in the boiler
- The lowest water level at which a boiler can be safely operated (correct)
- A level determined by the fuel type used in the boiler
Why are low water fuel cut-offs considered an important safety control for boilers?
Why are low water fuel cut-offs considered an important safety control for boilers?
What is essential to consider when repairing or replacing LWCOs in a boiler?
What is essential to consider when repairing or replacing LWCOs in a boiler?
What does a low water fuel cut-off (LWCO) directly detect in a boiler?
What does a low water fuel cut-off (LWCO) directly detect in a boiler?
What is the function of the low water fuel cut-off when the water level drops to level C?
What is the function of the low water fuel cut-off when the water level drops to level C?
What happens to the low water fuel cut-off when the water level drops below the upper probe in the electric probe type cut-off?
What happens to the low water fuel cut-off when the water level drops below the upper probe in the electric probe type cut-off?
What is a possible cause of rapidly falling water level in the boiler?
What is a possible cause of rapidly falling water level in the boiler?
How does the low water fuel cut-off respond when the water level drops to level B during normal operation?
How does the low water fuel cut-off respond when the water level drops to level B during normal operation?
What is the advantage of the electric probe type low water fuel cut-off?
What is the advantage of the electric probe type low water fuel cut-off?
What does Figure 7 show in relation to low water fuel cut-off?
What does Figure 7 show in relation to low water fuel cut-off?
What triggers the alarm circuit in a low water fuel cut-off device?
What triggers the alarm circuit in a low water fuel cut-off device?
In what scenario will manual reset of a low water fuel cut-off possibly be required?
In what scenario will manual reset of a low water fuel cut-off possibly be required?
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