Low Water Fuel Cut Off Flashcards
1
Q
The\_\_\_\_\_\_\_operted low water fuel cut off uses buoyancy to operate the switch: Float Electrode No-mental Thermal
A
Float
2
Q
The type of low water cut off that uses the conductivity of water to operate it is the : Float Thermal Three wire Electrode probe
A
Electrode probe
3
Q
The main cause of heating boiler failure is overheating of the heating surfaces due to: High water level Too high a steam pressure Low water level Operator error
A
Low water level
4
Q
A low fuel water cut off combination pump control will\_\_\_\_if the water level reaches a low level but still above the lowest permissible level: Shut down boiler Start the feedwater pump Close the fuel valve Open the safety valve
A
Start the feedwater pump
5
Q
Low water levels can develop in hot water boilers due to human error:
True
False
A
True
6
Q
On a steam boiler test the low water fuel cut off while the boiler is operating by:
Increasing the steam pressure
Blowing down the boiler
Opening the drain valve on the front chamber
Doing a pop test
A
Opening the drain valve on the float chamber
7
Q
A three wire double pole switch on a LWFCO will shit off the fuel and sound an alarm:
True
False
A
True
8
Q
A normal boiler steaming rates, a condensate receiver tank should have enough water to supply to keep the boiler supplied for\_\_\_\_\_\_minutes 30 15 45 60
A
30
