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Book 1 > Book 1: 2-10 - Boiler Programming Controls > Flashcards

Book 1: 2-10 - Boiler Programming Controls Flashcards

1
Q

The switch in the operating control of a steam boiler is opened by:

Select one:

A. Rising steam pressure
B. Rising steam temperature
C. Falling steam pressure
D. Falling steam temperature
E. Falling water pressure

A

A. Rising steam pressure

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2
Q

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 not in operation
D. Air through a furnace for a set period of time when the burner is not in operation
E. Fuel through a furnace for a set period of time when the burner is in operation

A

D. Air through a furnace for a set period of time when the burner is not in operation

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3
Q

The switch in the operating control of a steam boiler is closed by:

Select one:

A. Falling steam pressure
B. Rising steam pressure
C. Falling water pressure
D. Rising steam pressure
E. Falling steam pressure

A

A. Falling steam pressure

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4
Q

A programming control on a natural draft gas fired boiler operates in the following sequence.
1. The main burner is ignited
2. The flame detector senses the flame and causes the main gas valve to open
3. The ignition transformer and pilot gas valve are de energized and closed, if an interrupted pilot is used
4. The operating control initiates a startup
5. The load relay energizes the ignition transformer and the pilot gas valve

Select one:

A. 5,3,2,1,4
B. 4,5,2,1,3
C. 1,2,3,4,5
D. 2,5,1,4,3
E. 3,2,1,5,4

A

B. 4,5,2,1,3

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5
Q

The lock-out switch will be actuated when the:

Select one:

A. Low water fuel cut-off opens
B. Operating control closed
C. Operating control opens
D. Power fails
E. Flame scanner loses the flame

A

E. Flame scanner loses the flame

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6
Q

The two types of boiler combustion control include:
1. On-Off
2. Automatic
3. Modulating
4. Manual

Select one:

A. 2,4
B. 2,3
C. 3,4
D. 1,3
E. 1,2

A

D. 1,3

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7
Q

The programming 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 ignited 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 closed a switch

A

B. 5,3,2,1,4

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8
Q

Each time the boiler starts up it has to go through:

Select one:

A. Standard checks on the water quality
B. A test of the combustion control
C. Standard fuel system safety checks
D. Standard checks associated with a safe startup procedure
E. A water purge procedure

A

D. Standard checks associated with a safe startup procedure

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9
Q

What is the device used to determine that the fan motor is working:

Select one:

A. Power amperage draw meter
B. Motor contactor
C. Flame scanner
D. Air flow switch
E. Indicator light

A

D. Air flow switch

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10
Q

The switch in the operating control of a hot water boiler is opened by:

Select one:

A. Falling water pressure
B. Falling water temperature
C. Rising water pressure
D. Rising water temperature
E. Rising steam temperature

A

D. Rising water temperature

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11
Q

If the burner fails to ignite during the trial period, the lock-out switch is activated and the boiler cannot be restarted until:
Select one:

A. The fuel valve has been reset
B. The switch resets automatically
C. A short time period has passed
D. The furnace has been purged
E. The switch has been reset

A

E. The switch has been reset

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12
Q

If the blower stops again after 5-10 seconds:
Select one:

A. Close the blower switch
B. Refer to manufacturer’s manual
C. Reset safety lock-out switch
D. Check the low air pressure switch
E. Replace motor

A

D. Check the low pressure air switch

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13
Q

What is the name given to the component that co ordinates and sequences the boiler operation?
Select one:

A. Air/fuel ratio controller
B. Boiler master
C. Header pressure controller
D. Programming controller
E. Plant controller

A

D. Programming controller

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14
Q

If the combustion control safety lock-out switch is tripped:
Select one:

A. Close the blower switch
B. Refer to manufacturers manual
C. Replace motor
D. Reset safety lock-out switch
E. Check the low air pressure switch

A

D. Reset safety lock-out switch

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15
Q

The switch in the operating control of a hot water boiler is closed by:
Select one:

A. Rising water temperature
B. Falling water pressure
C. Falling water temperature
D. Falling steam temperature
E. Rising steam temperature

A

B. Falling water temperature

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16
Q

Before a steam or hot water boiler can be started by a programming control, but one of the following conditions must be fulfilled:
Select one:

A. 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
B. The water in the boiler drum must be above the cut-off point of the low-water fuel cut-off
C. All manually operated valves in the fuel lines to the pilot and main burner must be closed
D. The main power switch or breaker must be closed
E. The steam pressure or water temperature must be at or below the cut-in setting of the operating control

A

C. All manually operated valves in the fuel lines to the pilot and main burner must be closed

17
Q

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 start up.
Select one:

A. 15 to 30
B. 20 to 40
C. 30 to 50
D. 10 to 20
E. 5 to 10

A

A. 15 to 30

18
Q

A programming control on a natural draft gas fired boiler operates in the following sequence.
1. The main burner is ignited
2. The flame detector senses the flame and causes the main gas valve to open
3. The ignition transformer and pilot gas valve are de-energized and closed, if an interrupted pilot is used
4. The operating control initiates start up
5. The load relay energizes the ignition transformer and the pilot gas valve

Select one:
A. 3,2,1,5,4
B. 1,2,3,4,5
C. 2,5,1,4,3
D. 4,5,2,1,3
E. 5,3,2,1,4

A

D. 4,5,2,1,3

19
Q

The two types of boiler combustion include:
1. On-off
2. Automatic
3. Modulating
4. Manual

Select one:

A. 3,4
B. 2,3
C. 2,4
D. 1,3
E. 1,2

A

D. 1,3

20
Q

The switch in the operating control of a hot water boiler is opened by:

Select one:

A. Falling water temperature
B. Falling water pressure
C. Rising steam temperature
D. Rising water pressure
E. Rising water temperature

A

E. Rising water temperature

Book 1 (24 decks)

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