Book 1: 2-10 - Boiler Programming Controls

Question 1

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

Answer 1

A. Rising steam pressure

Question 2

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

Answer 2

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

Question 3

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

Answer 3

A. Falling steam pressure

Question 4

A programming control on a natural draft has 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

Answer 4

B. 4,5,2,1,3

Question 5

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

Answer 5

E. Flame scanner loses the flame

Question 6

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

Answer 6

D. 1,3

Question 7

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

Answer 7

B. 5,3,2,1,4

Question 8

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

Answer 8

D. Standard checks associated with a safe startup procedure

Question 9

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

Answer 9

D. Air flow switch

Question 10

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 waster pressure
D. Rising water temperature
E. Rising steam temperature

Answer 10

D. Rising water temperature