What should a technician do if called to work on an oil burner with a tripped safety reset?
A) Push the reset button and closely observe the ignition sequence.
B) Replace the cad cell.
C) Replace the oil burner primary control.
D) Check the combustion chamber for unburned oil.
[Ques. 2] What is used to top off the water supply for the system?
A) The low-water cutout B) The supply pump
C) A pressure-regulating valve D) The return water line
[Ques. 3] How can a hot water boiler heat water to 250F and not boil the water?
A) Water treatment is added whose primary purpose is to raise the boiling point of the water.
B) Hot water boilers cannot maintain 250F water without boiling the water.
C) The system is under enough pressure to raise the boiling point above the water temperature in the boiler.
D) The water does boil, but the steam is vented to the air.
[Ques. 4] A common ignition system problem is:
A) Incorrectly settings on the fan cycling switch. B) Dirty air filter.
C) Incorrectly set barometric damper. D) Cracked electrode insulators.
[Ques. 5] The first electrical checks of a system that is not operating generally involve:
A) Ohming out key components. B) Replacing all system capacitors.
C) Adding refrigerant. D) Checking the power circuit to the equipment.
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