Study Guide Questions (LA Steam Engineer
License Exam)
What are the precautions to be observed when starting any boiler that has been closed dow overnight?
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Are there any special precautions required starting a gas burning boiler? - (correct answer) -
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Make a physical observation of the boiler and its systems, walk around the boilerto check for any abnor
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mal conditions such as flammable material at the dampers, fuel leaks,damaged electrical conduits, etc. C
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heck all boiler systems (feedwater, fuel, etc). Very important issue in starting a gas firing boiler is a furnac
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e prepurge. It is never has to be altered or bypassed.
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How do you determine whether feedwater check valve for the boiler is not closing? - (correct answer) -
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Check the temperature differential at the check valve when feedwater pump is not in operation.
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What causes foaming in the boiler? How would you know when a boiler is foaming?
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How do you stop foaming in a boiler? - (correct answer) -
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High TDS, organic matter and oil in the boiler cases foaming. If the water level in the gage glass fluctuate
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s, the most probable cause of thisis foaming. We reduce amount of TDS by continuous and bottom blowd
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owns;we use anti-foaming chemicals to prevent foaming. hj hj hj hj hj hj
What is boiler priming? What causes priming? How can priming in a boiler damage an engine or pump? -
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(correct answer) -
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When the liquid water from the boiler drum gets to the steam lines it called priming. Priming can be cau
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sed by boiler drum level excessively high, by foaming, sudden pressure drop,and firing ratebeing to high.
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Priming causes water hammer that could destroy or shorten the life expectancy of a load (mechanical da
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mage)
What would you do if the pressure gauge on the boiler registers 150 psi and you knew that the safety val
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ve was set to open at 100 psi? - (correct answer) -
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Most likely pressure gage failed. In order to get such excessive pressure both operating and high pressur
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e limit controls have to fail also, plus the safety valve. Also, if the boiler was over pressurized to such exte
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nt, it would give some indications such as excessive vibration and abnormal sounds.Pressure gage can be
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quickly isolated and changed. hj hj hj
How do you test a safety valve to see if it operates at the proper set pressure?
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What is the difference between a safety valve and a relief valve? How often do you test these valves?
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How is leaking safety valve repaired? - (correct answer) -
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Pressure valves can be tested hydrostatically (boiler filled up with water pressure).Safety valves open in
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stantaneously and relief valves do not open fully with a set pressure.Safety valves are tested manually on
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License Exam)
What are the precautions to be observed when starting any boiler that has been closed dow overnight?
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
Are there any special precautions required starting a gas burning boiler? - (correct answer) -
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
Make a physical observation of the boiler and its systems, walk around the boilerto check for any abnor
hjhj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
mal conditions such as flammable material at the dampers, fuel leaks,damaged electrical conduits, etc. C
hj hj hj hj hj hj hj hj hj hj hj hj hj hj
heck all boiler systems (feedwater, fuel, etc). Very important issue in starting a gas firing boiler is a furnac
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
e prepurge. It is never has to be altered or bypassed.
hj hj hj hj hj hj hj hj hj hj
How do you determine whether feedwater check valve for the boiler is not closing? - (correct answer) -
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Check the temperature differential at the check valve when feedwater pump is not in operation.
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What causes foaming in the boiler? How would you know when a boiler is foaming?
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How do you stop foaming in a boiler? - (correct answer) -
hj hj hj hj hj hj hj hj hj hj hj hj
High TDS, organic matter and oil in the boiler cases foaming. If the water level in the gage glass fluctuate
hjhj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
s, the most probable cause of thisis foaming. We reduce amount of TDS by continuous and bottom blowd
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
owns;we use anti-foaming chemicals to prevent foaming. hj hj hj hj hj hj
What is boiler priming? What causes priming? How can priming in a boiler damage an engine or pump? -
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(correct answer) -
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When the liquid water from the boiler drum gets to the steam lines it called priming. Priming can be cau
hjhj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
sed by boiler drum level excessively high, by foaming, sudden pressure drop,and firing ratebeing to high.
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Priming causes water hammer that could destroy or shorten the life expectancy of a load (mechanical da
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
mage)
What would you do if the pressure gauge on the boiler registers 150 psi and you knew that the safety val
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
ve was set to open at 100 psi? - (correct answer) -
hj hj hj hj hj hj hj hj hj hj hj
Most likely pressure gage failed. In order to get such excessive pressure both operating and high pressur
hjhj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
e limit controls have to fail also, plus the safety valve. Also, if the boiler was over pressurized to such exte
hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj hj
nt, it would give some indications such as excessive vibration and abnormal sounds.Pressure gage can be
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quickly isolated and changed. hj hj hj
How do you test a safety valve to see if it operates at the proper set pressure?
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What is the difference between a safety valve and a relief valve? How often do you test these valves?
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How is leaking safety valve repaired? - (correct answer) -
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Pressure valves can be tested hydrostatically (boiler filled up with water pressure).Safety valves open in
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stantaneously and relief valves do not open fully with a set pressure.Safety valves are tested manually on
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