chapter 10 Flashcards
The purpose of purging a boiler combustion chamber is:
a. Prepare the combustion chamber for post purge
b. Lower the temperature in the combustion chamber in preparation for burner light-off
c. Provide air sufficient for ignition of the pilot
d. Remove any combustible gases that may have collected while the burner was off
d
A combustion controller is not required on a natural draft boiler
True False
false
With direct spark ignition:
a. The ignitor is de-energized after the pilot is lit
b. The ignitor remains energized while the main gas valve is energized
c. There is no pilot fuel valve
d. There is no igniter
c
The programming control
a. Provides proper sequencing of the combustion processes during boiler start-up and shut-down
d. Keeps the main burner in operation until the desired pre-set operating condition is reached
c. Ensures safe operating conditions during boiler operation
d. All of the above
d
If the pilot fails to light, the boiler’s combustion contoller will
a. Shut down and lock out
b. Recycle the ignition sequence until the pilot lights
c. Open the main flame to provide sufficient light-off fuel
d. Continue to spark the ignitor until the pilot does light
a
What is the device used to determine that the boiler’s blower fan motor is working
a) Indicator light
b) Motor contactor
c) Air-flow switch
d) Power amperage draw meter
c
In a combustion controller, the flame relay controls:
a) power to the safety valve
b) power to the main SSOV
c) power to the scanner
d) power to the modulating motor
b
If the boiler programming control reports a “low fire switch open,” the ______________ may have failed.
a) SSOV
b) low gas pressure switch
c) damper motor
d) the air proving switch
c
The programming control
a) Provides proper sequencing of the combustion processes during boiler start-up and shut-down
b) Keeps the main burner in operation until the desired pre-set operating condition is reached
c) Ensures safe operating conditions during boiler operation
d) All of the above
d
The purpose of purging a boiler combustion chamber is:
a) Remove any combustible gases that may have collected while the burner was off
b) Prepare the combustion chamber for post purge
c) Lower the temperature in the combustion chamber in preparation for burner light-off
d) Provide air sufficient for ignition of the pilot
a
With direct spark ignition:
a) There is no igniter
b) The ignitor is de-energized after the pilot is lit
c) The ignitor remains energized while the main gas valve is energized
d) There is no pilot fuel valve
d
Prior to starting a new boiler for the first time it is common practise to:
a) Test the safety valve or relief valves first
b) Establish a main flame first to ensure the controls are functioning
c) Ensure all controls work before contacting the inspector
d) “Boil out” the water side with chemicals to remove oil, etc
d
What is the name given to the component that coordinates and sequences the boiler operation?
A.Air/fuel ratio controller
B.Programming controller
C. Boiler master
D.Header pressure controller
E.Plant controller
b
Each time the boiler starts up it has to go through:
A.Standard checks associated with a safe startup procedure.
B.A water purge procedure
C.A test of the combustion control
D.Standard checks on the water quality
E.Standard fuel system safety checks
a
The two types of boiler combustion control include:
1. On-Off
2. Automatic
3. Modulating
4. Manual
A.2, 3
B.2, 4
C.1, 2
D.1, 3
E.3, 4
d
