Boiler operator study guide.

question

Safety valve
answer

Prevents boiler pressure from rising above the setting of the valve by relieving excessive steam pressure, guarding against hazards of over pressure.
question

Steam supply stop valve
answer

The valve installed at the steam outlet of the boiler to shut off the flow of steam.
question

Steam pressure gauge
answer

Indicates the steam pressure in the boiler in pounds per square inch, or p s i.
question

Steam gauge syphon
answer

The device installed between the steam gauge and the boiler to provide a water seal, so that live steam will not enter the gauge to cause a false reading or damage to the gauge.
question

Inspector’s test gauge connection and cock
answer

Provides the necessary connection to check the accuracy of the steam pressure gauge on the boiler.
question

Water column
answer

The hollow casting or forging connected at the top, to the boiler’s steam space, and at the bottom to the water space. The water gauge glass and water test cocks are installed on this.
question

Water glass and gauge fixtures
answer

Visibly show the water level in the boiler.
question

Water test gauges, or try cocks
answer

Are used for testing the water level in the boiler incase the water glass is for any reason unreadable.
question

Drain valve under the water column and switch
answer

Provides a means for daily flushing under the water column and water level controls to keep the chamber and lines clean, maintaining a accurate water glass reading, as well as a means of testing the low water cutoff.
question

Blowoff valve
answer

Provides a method of draining, flushing and, blowing off the boiler at the lowest point to remove solids, sediment, seals and sludge thus keeping the boiler clean.
question

Water feed inlet stop valve
answer

Shut off valve required next to the boiler attached to the water feed inlet, allowing the entire line to be shut off manually so that work may be done on the pump or check valve. Must never be closed when the pump is in operation.
question

Water feed inlet check valve
answer

Check valve on the water feed inlet that closes to prevent water or steam from the boiler backing up into the water feed line.
question

Low water cutoff
answer

A control required on all boilers to shut off the main fuel burner when the water reaches the lowest safe permissible level.
question

Steam pressure operating control
answer

To maintain the desired steam operating pressure on the boiler by regulating the burner to the steam pressure setting.
question

Hi limit pressure control
answer

Is in addition to the operating control to shut off the main fuel burner supply when the pressure in the boiler exceeds the desired maximum setting.
question

100% flame safeguard
answer

The pilot safety device used to shut off the main fuel burner valve and the pilot burner in the event of a pilot failure as well as preventing the main burner from turning on until a safe pilot is established.

Get instant access to
all materials

Become a Member