Boiler Primary Control System Quiz

What is the first step in the typical sequence of operation for most programming controllers mentioned in the text?

When does the BMS start the draft fan according to the sequence of operation outlined in the text?

What initiates the increase in fan speed or combustion air damper position to high-fire position as per the text?

What marks the completion of the purge process as per the typical sequence of operation discussed in the text?

When does the BMS ignite the pilot flame based on the sequence of operation detailed in the text?

What is the purpose of waiting up to 10 seconds after starting the igniter according to the text?

What happens when the steam pressure or hot water temperature rises above the set point of the operating control?

What occurs during the programming controller's post-purge phase?

What does the programming controller do during standby mode?

If the SSOV proof-of-closure switches do not close during standby, what does the programming controller do?

When a call for heat is received and all permissives are satisfied, what does the programming controller do?

What will the BMS do if the pilot is too small to reliably light off the main burner?

During the main flame trial for ignition period, what happens if the main flame is not established within 10 seconds?

What initiates the Safe Start stage in the operating sequence chart?

What happens if a flame is detected during the safe start check according to the text?

During the Pilot Trial for Ignition period, what is expected if the pilot flame is not proven within 10 seconds?

What does the BMS do if a permissive switch opens during the run period?

What happens if a flame is not detected during safe start check?

Which component must be at the proper pressure to satisfy the low atomizing medium cut-off switch for an oil-fired boiler?

What must be running to satisfy the low fuel pressure cut-off switch for an oil-fired boiler?

In a dual fuel boiler, what must be placed on either oil or gas depending on the fuel used?

What is required to initiate the boiler ignition sequence according to the text?

What does closing the on-off switch during initial startup lead to?

What is needed for the programming controller to move from standby mode to safe start check mode?

What happens if the pilot fails to light within 15 to 90 seconds?

If the main flame goes out during the run period, what action does the burner take?

What does the primary controller do in case of a second failed attempt to establish a pilot?

What action is taken if the number of main flame failures in a call for heat cycle reaches 5?

What must the operator do if there is an ignition failure during boiler startup?

What are the conditions that must be satisfied before a boiler can be started by its programming controller?

What does the programming controller do if permissives and pre-ignition interlocks are not satisfied?

What happens if there is a main burner failure during operation?

What happens if there is an ignition failure during boiler startup?

What happens in case of a main flame failure during operation?

What happens when a safety shutdown and lockout occurs during the PILOT TRIAL-FOR-IGNITION PERIOD (PTFI)?

When does the burner restart automatically in an automatically fired boiler?

Which component of a natural draft gas-fired boiler is energized to light the pilot flame?

What is a requirement for all fuel-fired boilers?

What is indicated directly on the controller during a safety shutdown and lockout?

What happens during a safety shutdown if an SSOV proof-of-closure switch opens during the RUN period?

Which condition is likely to trigger a safety shutdown and lockout during the INITIATE period?

What occurs when an operating control opens in an automatically fired boiler?

'Shutdown without Lockout' occurs in an automatically fired boiler when:

'Safety Shutdown and Lockout' closes all SSOVs and locks itself out when: