Basic Fittings For Steam Boilers

Question 1

Purpose of the pipe siphon installed between the boiler and the pressure gauge is to prevent,
Air from entering the boiler
Hot steam from entering the boiler 
Water from entering the gauge
Air from entering the gauge

Answer 1

Hot steam from entering the gauge

Question 2

LP steam boilers must be equipped with a marker indicating the:
Fire line
Low water fuel cut off line 
Lowest visible water line 
Lowest permissible water line 
Maximum water level line

Answer 2

Lowest permissible water line

Question 3

If a gauge glass breaks the operator shall immediately:
Shit the boiler down
Lift the safety valve
Shut off the steam valve and water valve in the gauge
Shut off fuel valve

Answer 3

Shut off the steam valve and water valve on the gauge.