The donkey boiler may be given a bottom blow _____.A.to raise water levelB.only while maki

Which of the following may hardness of the boiler water cause？ （1) scale formation; （2) tube failure; （3) corrosion.

Failure of the burner flame in an auxiliary boiler would probably be a result of .A.water

The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if

_____, i.ea steam cooler, may be filled in the boiler system to control the superheated st

The tube in a boiler should be blinded if found _____.A.scaledB.informedC.leakyD.deformed

Care must be taken to condition the ______ in the boiler to prevent scaling, and corrosion