Answer the following statements true (T) or false (F)

1 CO is an asphyxiant that can cause death in high enough concentrations.
2 A process technician completes the inspection of the furnace’s internal components.
3 When using combination burners, firebox temperature must be near the operating range before the fuel oil is introduced.
4 Boilers deliver steam to a process at a desired pressure and temperature that is used throughout the process facility.
5 The economizer section is used to decrease boiler efficiency by reheating the water as it enters the boiler system.


1 True.
2 False. Poor control of excess air and poor draft control can lead to reduced boiler efficiency.
3 True.
4 False. When putting a vessel into service, the pressure should be increased gradually to operating pressure because rapid pressure changes can damage internal components.
5 True. Vessel wall thickness checks may be made while the vessel is in operation, but more accurate thickness measurements are made when a vessel is empty and clean.

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Technician A states that oil cooler bundles can be tested using a vacuum adapter. Technician B states that oil cooler bundles can be tested using regulated air pressure.

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