STUDY GUIDE QUESTIONS (LA STEAM ENGINEER
LICENSE EXAM) ANSWERED CORRECTLY TO PASS!!
What are the precautions to be observed when starting any boiler that has
been closed dow overnight? Are there any special precautions required starting
a gas burning boiler? Answer - Make a physical observation of the boiler and
its systems, walk around the boilerto check for any abnormal conditions such
as flammable material at the dampers, fuel leaks,damaged electrical conduits,
etc. Check all boiler systems (feedwater, fuel, etc). Very important issue in
starting a gas firing boiler is a furnace prepurge. It is never has to be altered or
bypassed.
How do you determine whether feedwater check valve for the boiler is not
closing? Answer - Check the temperature differential at the check valve when
feedwater pump is not in operation.
What causes foaming in the boiler? How would you know when a boiler is
foaming? How do you stop foaming in a boiler? Answer - High TDS, organic
matter and oil in the boiler cases foaming. If the water level in the gage glass
fluctuates, the most probable cause of thisis foaming. We reduce amount of
TDS by continuous and bottom blowdowns;we use anti-foaming chemicals to
prevent foaming.
What is boiler priming? What causes priming? How can priming in a boiler
damage an engine or pump? Answer - When the liquid water from the boiler
drum gets to the steam lines it called priming. Priming can be caused by boiler
drum level excessively high, by foaming, sudden pressure drop,and firing
ratebeing to high. Priming causes water hammer that could destroy or shorten
the life expectancy of a load (mechanical damage)
LICENSE EXAM) ANSWERED CORRECTLY TO PASS!!
What are the precautions to be observed when starting any boiler that has
been closed dow overnight? Are there any special precautions required starting
a gas burning boiler? Answer - Make a physical observation of the boiler and
its systems, walk around the boilerto check for any abnormal conditions such
as flammable material at the dampers, fuel leaks,damaged electrical conduits,
etc. Check all boiler systems (feedwater, fuel, etc). Very important issue in
starting a gas firing boiler is a furnace prepurge. It is never has to be altered or
bypassed.
How do you determine whether feedwater check valve for the boiler is not
closing? Answer - Check the temperature differential at the check valve when
feedwater pump is not in operation.
What causes foaming in the boiler? How would you know when a boiler is
foaming? How do you stop foaming in a boiler? Answer - High TDS, organic
matter and oil in the boiler cases foaming. If the water level in the gage glass
fluctuates, the most probable cause of thisis foaming. We reduce amount of
TDS by continuous and bottom blowdowns;we use anti-foaming chemicals to
prevent foaming.
What is boiler priming? What causes priming? How can priming in a boiler
damage an engine or pump? Answer - When the liquid water from the boiler
drum gets to the steam lines it called priming. Priming can be caused by boiler
drum level excessively high, by foaming, sudden pressure drop,and firing
ratebeing to high. Priming causes water hammer that could destroy or shorten
the life expectancy of a load (mechanical damage)
