P99 LOW PRESSURE BOILERS UPDATED EXAM QUESTIONS
AND ANSWERS GRADED A+
✔✔The oil strainer removes the contaminants - ✔✔From the oil before the oil reaches
the burner
✔✔The vacuum gauge is a device that - ✔✔Measures the pressure below atmospheric
pressure
✔✔Excessive vacuum readings indicate that there - ✔✔Is an obstruction in the suction
line (such as a dirty oil strainer)
✔✔Preheaters are used to heat the oil - ✔✔Before the oil enters the burner for
combustion
✔✔The oil is heated between - ✔✔160 and 180 Fahrenheit
✔✔The normal normal oil pressure for no. 6 oil burner is - ✔✔Between 30 and 50 psi
✔✔A back pressure relief valve is provided for safety if the - ✔✔Pressure becomes too
great
✔✔Carbon and hydrogen are - ✔✔Two principal elements of fuel oil
✔✔Oil is a liquid fuel and as such - ✔✔Will not burn
✔✔A red smoky flame is an indication of - ✔✔A lack of air
✔✔The manual reset pressuretrol is a control that will shut down the a steam burner
boiler if the - ✔✔Pressure continues to rise above the operating control settings
✔✔The safety or pop off valve is a device used to - ✔✔Relieve excessive steam
pressure
✔✔The boiler steam pressure gauge shows the steam pressure - ✔✔Inside the steam
boiler
✔✔The stack switch is the - ✔✔Primary control
✔✔The aquastat - ✔✔Operates the oil burner for domestic hot water needs
✔✔The photoelectric cell is a - ✔✔Flame detection control
AND ANSWERS GRADED A+
✔✔The oil strainer removes the contaminants - ✔✔From the oil before the oil reaches
the burner
✔✔The vacuum gauge is a device that - ✔✔Measures the pressure below atmospheric
pressure
✔✔Excessive vacuum readings indicate that there - ✔✔Is an obstruction in the suction
line (such as a dirty oil strainer)
✔✔Preheaters are used to heat the oil - ✔✔Before the oil enters the burner for
combustion
✔✔The oil is heated between - ✔✔160 and 180 Fahrenheit
✔✔The normal normal oil pressure for no. 6 oil burner is - ✔✔Between 30 and 50 psi
✔✔A back pressure relief valve is provided for safety if the - ✔✔Pressure becomes too
great
✔✔Carbon and hydrogen are - ✔✔Two principal elements of fuel oil
✔✔Oil is a liquid fuel and as such - ✔✔Will not burn
✔✔A red smoky flame is an indication of - ✔✔A lack of air
✔✔The manual reset pressuretrol is a control that will shut down the a steam burner
boiler if the - ✔✔Pressure continues to rise above the operating control settings
✔✔The safety or pop off valve is a device used to - ✔✔Relieve excessive steam
pressure
✔✔The boiler steam pressure gauge shows the steam pressure - ✔✔Inside the steam
boiler
✔✔The stack switch is the - ✔✔Primary control
✔✔The aquastat - ✔✔Operates the oil burner for domestic hot water needs
✔✔The photoelectric cell is a - ✔✔Flame detection control
