Gas and Steam Controls Quiz Flashcards
What protects a steam boiler from a low water condition?
A Low Water Cut-Off (L.W.C.O)
What control protects a steam boiler from high pressure?
A Pressuretrol
What safety device protects a steam boiler from high pressure?
A relief valve
What is the setting of the safety device that protects a steam boiler from high pressure?
15 psi
What device detects a blocked flue passageway inside a boiler?
A Flame Roll Out (F.R.O.)
What device detects a blocked flue pipe or chimney way?
a Spill Switch (S.S.)
Terminals 1-2 on a low water cut-off are used in the _______ circuit.
Burner/Safety
Terminals 3-4 are used for what on a low water cut-off?
An Automatic Feeder
A thermostat is a normally _______ switch.
open
What is the minimum header height?
24”
What is the minimum equalizer pipe?
1 1/4”
How far below the waterline should the equalizer connect?
2-4”
The main steam vent should be installed______ inches from the steam main.
15”
What control can be installed on a steam boiler to add more water?
An Automatic Feeder
