30 Questions
What should operators be well versed in to respond correctly to adverse conditions?
Plant blackout procedures
What is one of the considerations for dealing with electrical power failures?
The positions in which various control valves fail (open, shut, or last position)
What should operators know about equipment fed by standby power?
What equipment is fed by standby power, and what is not
In the event of a standby generator failing to start automatically, what should operators know how to do?
Manually start a standby generator
What should operators be knowledgeable about to restart equipment after power is restored?
The sequence for starting equipment after power is restored
What should plant operators be able to do if an automatic transfer switch fails to operate automatically?
Manually operate an automatic transfer switch
What is the primary purpose of an Emergency Power Supply System (EPSS) in a power plant?
To start automatically and supply power to critical equipment during a power failure
What is the function of an Uninterruptible Power Supply (UPS) in a power plant?
To maintain power to critical equipment at all times through a system of batteries
What happens to valves when there is a loss of power in a power plant?
They fail shut or closed, blocking flow
What is the appropriate action for an operator when a power failure occurs in a plant with no backup power?
Monitor the boiler as it cools down and perform tasks to put the plant in a safe state
What is one of the challenges of firing solid fuel during a power failure?
The fuel in the furnace can continue to burn and lower the boiler water level
What is the purpose of banking the fire in a boiler during a power failure?
To prevent unattended light-off when power is restored
What should be done if the fuel oil pressure remains low after changing the fuel oil strainer?
Switch to the standby fuel oil pump and check the fuel supply pressure
What is a common cause of poor quality flames in air or steam-atomized burners?
Inadequate atomizing medium pressure
What can cause the flame safeguard control to trip the burner off?
Failure of flame detection and flame safeguard controls
What should be done if an FD fan fails, and the combustion air proving switch does not shut down the burner?
Immediately shut the main and pilot test firing valves
What should be done after repairs are complete for an FD fan failure?
Thoroughly purge the furnace prior to beginning a normal restart
What is recommended to sweep carbon monoxide and unburned fuel from the furnace after shutting down an FD fan?
Allow air to enter the furnace through the fan damper when the furnace is cooler
What should be done when the boiler water level is below the lowest visible part of the gauge glass?
Shut the boiler down and let it cool slowly
What can cause excessive fuel pressure in a boiler?
Inadequate fuel pressure regulator
What may result from an inadequate pilot flame during the ignition period?
Main flame instability
What should be done if the boiler water level is above the highest visible part of the gauge glass?
Lower the boiler water level using blowoff valves
What should be done if a flame failure occurs in a boiler?
Shut the test firing valves and isolate the boiler
What should be done when the boiler water level is outside of the visible portion of the gauge glass?
Blow down the gauge glass to reveal the water level
What is the purpose of the DC seal oil pump mentioned in the text?
To start on a power failure and run until the hydrogen can be vented
What could be a cause of a loss of water level in the boiler?
Overheating due to excessive waterside scale accumulation
What action should be taken if the feedwater control valve is suspected to be closed?
Remove the feedwater control valve from service and repair promptly
What could be the consequence of a condensate transfer pump failing?
Boiler feedwater pump damage and low boiler water level
How can a quick scan of blowdown and blowoff lines reveal problems with the boiler?
By checking the temperature with a handheld infrared thermometer
What is the recommended action if a leak is suspected in the boiler?
Shut down the boilers until the cause of the low deaerator level is determined and corrected
This quiz covers the operation of DC seal oil pump during power failure to prevent hydrogen coolant escape and explosion hazard in alternators. It also addresses the potential causes of water level loss in the system.
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