MASSACHUSETTS Oil Burner License 2026-2027
Comprehensive Frequently Tested Questions With
Verified Multiple Choice and Conceptual Actual
100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
1. What factors determine the nozzle spray angle used on an oil burner?
A. Fuel pressure and pump size
B. Burner air pattern and chamber size and shape
C. Nozzle GPH and electrode gap
D. Draft and stack temperature
Correct answer: B
2. What is the correct path of oil through the nozzle?
A. Filter → swirl chamber → orifice → tangential slots
B. Body slots → filter → orifice → swirl chamber
C. Filter → body slots → tangential slots → swirl chamber → orifice
D. Filter → pump → orifice → nozzle head
Correct answer: C
3. What settings must be adjusted when installing new electrodes?
A. Voltage, amperage, polarity
B. Height, gap, overhang
C. Length, angle, pressure
D. Gap, voltage, alignment
Correct answer: B
,4. What is the maximum distance a service switch may be located from the
burner?
A. 2 feet
B. 3 feet
C. 5 feet
D. 6 feet
Correct answer: B
5. What is the amperage on the secondary side of a step-up ignition
transformer?
A. 5 milliamps
B. 10 milliamps
C. 23 milliamps
D. 50 milliamps
Correct answer: C
6. What are two common causes of oil after-drip?
A. Plugged nozzle and low draft
B. Air in the draw assembly and faulty pump cutoff
C. Excess air and high pressure
D. Cold oil and low voltage
Correct answer: B
7. How far must a fill or vent pipe be from a door or window?
A. 1 foot
B. 18 inches
C. 2 feet
D. 4 feet
Correct answer: C
,8. What device stops the burner in the event of a fire?
A. Primary control
B. High-limit control
C. Thermal switch
D. Service switch
Correct answer: C
9. What is the maximum lockout time for a burner firing at 3 GPH?
A. 10 seconds
B. 12 seconds
C. 15 seconds
D. 30 seconds
Correct answer: C
10. At what minimum temperature does a stack switch operate?
A. 250°F
B. 275°F
C. 300°F
D. 350°F
Correct answer: C
11. What size copper oil line is standard for residential burners?
A. 1/4 inch
B. 5/16 inch
C. 3/8 inch
D. 1/2 inch
Correct answer: C
, 12. Above what ceiling height is a second thermal switch required?
A. 8 feet
B. 10 feet
C. 12 feet
D. 15 feet
Correct answer: C
13. At what temperature is a thermal safety switch set?
A. 140°F
B. 150°F
C. 165°F
D. 200°F
Correct answer: C
14. What is the maximum distance allowed between the thermal switch and the
burner?
A. 3 feet
B. 5 feet
C. 6 feet
D. 10 feet
Correct answer: C
15. How far below or horizontally from a door or window must a power vent
terminal be installed?
A. 24 inches
B. 36 inches
C. 48 inches
D. 60 inches
Correct answer: C
Comprehensive Frequently Tested Questions With
Verified Multiple Choice and Conceptual Actual
100% Correct Detailed Answers
Guaranteed Pass!!Current Update!!
1. What factors determine the nozzle spray angle used on an oil burner?
A. Fuel pressure and pump size
B. Burner air pattern and chamber size and shape
C. Nozzle GPH and electrode gap
D. Draft and stack temperature
Correct answer: B
2. What is the correct path of oil through the nozzle?
A. Filter → swirl chamber → orifice → tangential slots
B. Body slots → filter → orifice → swirl chamber
C. Filter → body slots → tangential slots → swirl chamber → orifice
D. Filter → pump → orifice → nozzle head
Correct answer: C
3. What settings must be adjusted when installing new electrodes?
A. Voltage, amperage, polarity
B. Height, gap, overhang
C. Length, angle, pressure
D. Gap, voltage, alignment
Correct answer: B
,4. What is the maximum distance a service switch may be located from the
burner?
A. 2 feet
B. 3 feet
C. 5 feet
D. 6 feet
Correct answer: B
5. What is the amperage on the secondary side of a step-up ignition
transformer?
A. 5 milliamps
B. 10 milliamps
C. 23 milliamps
D. 50 milliamps
Correct answer: C
6. What are two common causes of oil after-drip?
A. Plugged nozzle and low draft
B. Air in the draw assembly and faulty pump cutoff
C. Excess air and high pressure
D. Cold oil and low voltage
Correct answer: B
7. How far must a fill or vent pipe be from a door or window?
A. 1 foot
B. 18 inches
C. 2 feet
D. 4 feet
Correct answer: C
,8. What device stops the burner in the event of a fire?
A. Primary control
B. High-limit control
C. Thermal switch
D. Service switch
Correct answer: C
9. What is the maximum lockout time for a burner firing at 3 GPH?
A. 10 seconds
B. 12 seconds
C. 15 seconds
D. 30 seconds
Correct answer: C
10. At what minimum temperature does a stack switch operate?
A. 250°F
B. 275°F
C. 300°F
D. 350°F
Correct answer: C
11. What size copper oil line is standard for residential burners?
A. 1/4 inch
B. 5/16 inch
C. 3/8 inch
D. 1/2 inch
Correct answer: C
, 12. Above what ceiling height is a second thermal switch required?
A. 8 feet
B. 10 feet
C. 12 feet
D. 15 feet
Correct answer: C
13. At what temperature is a thermal safety switch set?
A. 140°F
B. 150°F
C. 165°F
D. 200°F
Correct answer: C
14. What is the maximum distance allowed between the thermal switch and the
burner?
A. 3 feet
B. 5 feet
C. 6 feet
D. 10 feet
Correct answer: C
15. How far below or horizontally from a door or window must a power vent
terminal be installed?
A. 24 inches
B. 36 inches
C. 48 inches
D. 60 inches
Correct answer: C
