Book 1: 2-10 - Boiler Programming Controls Flashcards
What is the name given to the component that coordinates and sequences the boiler operation?
Select one:
A. Plant controller
B. Boiler master
C. Programming controller
D. Air/fuel ratio controller
E. Header pressure controller
C. Programming controller
What is the device used to determine that the fan motor is working:
Select one:
A. Indicator light
B. Air flow switch
C. Flame scanner
D. Power amperage draw meter
E. Motor contactor
B. Air flow switch
The two types of boiler combustion control include:
1. On-Off
2. Automatic
3. Modulating
4. Manual
Select one:
A. 2, 3
B. 3, 4
C. 1, 2
D. 2, 4
E. 1, 3
E. 1, 3
The switch in the operating control of a steam boiler is closed by:
Select one:
A. Falling steam temperature
B. Rising steam temperature
C. Falling water pressure
D. Falling steam pressure
E. Rising steam pressure
D. Falling steam pressure
The programmed startup sequence of oil-fired boilers with no pilot light is as follows:
1. The flame detector senses the flame and causes the flame relay to close
2. The spark from the ignition transformer ignites the main burner
3. The load relay energizes the ignition transformer, fuel oil shut-off valve, and motor driving the air fan and fuel pump
4. The ignition transformer is then de-energized
5. The operating control closes a switch
Select one:
A. 1, 2, 3, 4, 5
B. 4, 5, 2, 1, 3
C. 5, 3, 2, 1, 4
D. 2, 5, 1, 4, 3
E. 3, 2, 1, 5, 4
C. 5, 3, 2, 1, 4
The lock-out switch will be actuated when the:
Select one:
A. Operating control opens
B. Operating control closes
C. Flame scanner loses the flame
D. Low water fuel cut-off opens
E. Power fails
C. Flame scanner loses the flame
Purging a furnace means forcing a flow of:
Select one:
A. Water through a furnace for a set period of time when the burner is in operation.
B. Air through a furnace for a set period of time when the burner is in operation.
C. Fuel through a furnace for a set period of time when the burner is in operation.
D. Fuel through a furnace for a set period of time when the burner is not in operation.
E. Air through a furnace for a set period of time when the burner is not in operation.
E. Air through a furnace for a set period of time when the burner is not in operation.
Before a steam or hot water boiler can be started by a programming control, all but one of the following conditions must be fulfilled:
Select one:
A. The main power switch or breaker must be closed
B. The steam pressure or water temperature must be at or below the cut-in setting of the operating control
C. The water in the boiler drum must be above the cut-off point of the low-water fuel cut-off
D. All manually operated valves in the fuel lines to the pilot and main burner must be closed
E. If the boiler is gas-fired, the fuel supply pressure to the burner valves must be above the cutout point of the low gas pressure cut-off
D. All manually operated valves in the fuel lines to the pilot and main burner must be closed
Each time the boiler starts up it has to go through:
Select one:
A. Standard checks associated with a safe startup procedure.
B. Standard checks on the water quality
C. A test of the combustion control
D. A water purge procedure
E. Standard fuel system safety checks
A. Standard checks associated with a safe startup procedure.
If the blower starts but stops again after 5-10 seconds:
Select one:
A. Check the low air pressure switch
B. Replace motor
C. Reset safety lock-out switch
D. Refer to manufacturer’s manual
E. Close the blower switch
A. Check the low air pressure switch
The switch in the operating control of a hot water boiler is closed by:
Select one:
A. Falling water pressure
B. Falling water temperature
C. Rising steam temperature
D. Rising water pressure
E. Falling steam temperature
B. Falling water temperature
The switch in the operating control of a steam boiler is opened by:
Select one:
A. Falling steam temperature
B. Falling steam pressure
C. Rising steam temperature
D. Rising steam pressure
E. Falling water pressure
D. Rising steam pressure
If the pilot burner fails to ignite, or if the pilot does go on, the gas burner fails to ignite a lockout switch will be energized after a short trial period of _____ seconds from the time of startup.
Select one:
A. 30 to 50
B. 20 to 40
C. 10 to 20
D. 15 to 30
E. 5 to 10
D. 15 to 30
If the combustion control safety lock-out switch is tripped:
Select one:
A. Refer to manufacturer’s manual
B. Check the low air pressure switch
C. Reset safety lock-out switch
D. Close the blower switch
E. Replace motor
C. Reset safety lock-out switch
If the burner fails to ignite during the ignition trial period, the lock-out switch is activated and the boiler cannot be restarted until:
Select one:
A. A short time period has passed
B. The furnace has been purged
C. The switch has been manually reset
D. The switch resets automatically
E. The fuel valve has been reset
C. The switch has been manually reset
The switch in the operating control of a hot water boiler is opened by:
Select one:
A. Rising water pressure
B. Rising water temperature
C. Falling water pressure
D. Rising steam temperature
E. Falling water temperature
B. Rising water temperature
