1.What is a ‘combustible gas mixture’?
2.Explain the operating principle of a gas detection system.
3.Why is gas detection as important as fire detection?
4.What are the components used in a gas detection loop?
5.What is a ‘flame arrester’ in a gas sensor? What does it do?
6.What are the name of the filaments inside the gas sensor?
7.How much approximately is the resistance of a gas sensors filament?
8.How to check a gas monitor without test gas?
9.Why is a three-wire system used on the sensors?
10.What are the types (manufacturer) of gas monitor systems used in P.D.O.?