Ontario Oil Burner Technician 2 (OBT2)
Certification Exam With Actual
Questions & Verified Answers, Plus
Explained Rationales/Expert Verified
For Guaranteed 100% Pass 2026/Latest
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1. What is the primary purpose of a barometric draft regulator in an
oil burner system?
A. Increase combustion temperature
B. Reduce fuel consumption
C. Maintain consistent chimney draft
D. Eliminate soot formation
Rationale: The barometric draft regulator stabilizes draft
pressure in the chimney to ensure proper combustion and
prevent excessive draft.
2. Which component atomizes oil into a fine spray for combustion?
A. Oil pump
B. Ignition transformer
C. Nozzle
D. Cad cell
Rationale: The nozzle breaks fuel oil into a fine mist, allowing
efficient mixing with air for proper combustion.
3. What is the typical voltage output of an oil burner ignition
transformer?
A. 120 volts
, B. 240 volts
C. 1,000 volts
D. 10,000 volts or higher
Rationale: Ignition transformers generate high voltage (often
10,000V+) to create a spark for igniting fuel.
4. What device proves flame presence in modern oil burners?
A. Thermostat
B. Limit switch
C. Cadmium sulfide (cad) cell
D. Aquastat
Rationale: A cad cell senses light from the flame to confirm
successful ignition and safe operation.
5. What is the purpose of a primary control?
A. Control fuel pressure
B. Adjust airflow
C. Manage burner operation and safety shutdown
D. Heat the oil
Rationale: The primary control monitors ignition and shuts down
the burner if no flame is detected.
6. What is the correct unit for measuring draft?
A. PSI
B. BTU
C. Volts
D. Inches of water column
Rationale: Draft is measured in inches of water column to
indicate pressure differences in the chimney.
7. What happens if combustion air is insufficient?
A. Cleaner combustion
B. Lower temperature
, C. Soot formation and incomplete combustion
D. Increased efficiency
Rationale: Insufficient air leads to incomplete combustion,
producing soot and carbon monoxide.
8. What tool is used to measure smoke levels in flue gas?
A. Manometer
B. Thermometer
C. Smoke tester
D. Multimeter
Rationale: A smoke tester evaluates soot levels to ensure proper
combustion.
9. What is the typical oil pump pressure for residential burners?
A. 10 psi
B. 50 psi
C. 100–150 psi
D. 300 psi
Rationale: Most residential oil burners operate between 100 and
150 psi for proper atomization.
10. What does a delayed ignition indicate?
A. Proper operation
B. Low fuel pressure
C. Accumulation of unburned fuel before ignition
D. Excess air
Rationale: Delayed ignition allows fuel buildup, causing a rough
or explosive start.
11. What is the function of a heat exchanger?
A. Store fuel
B. Increase airflow
C. Transfer heat to air or water
Certification Exam With Actual
Questions & Verified Answers, Plus
Explained Rationales/Expert Verified
For Guaranteed 100% Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of a barometric draft regulator in an
oil burner system?
A. Increase combustion temperature
B. Reduce fuel consumption
C. Maintain consistent chimney draft
D. Eliminate soot formation
Rationale: The barometric draft regulator stabilizes draft
pressure in the chimney to ensure proper combustion and
prevent excessive draft.
2. Which component atomizes oil into a fine spray for combustion?
A. Oil pump
B. Ignition transformer
C. Nozzle
D. Cad cell
Rationale: The nozzle breaks fuel oil into a fine mist, allowing
efficient mixing with air for proper combustion.
3. What is the typical voltage output of an oil burner ignition
transformer?
A. 120 volts
, B. 240 volts
C. 1,000 volts
D. 10,000 volts or higher
Rationale: Ignition transformers generate high voltage (often
10,000V+) to create a spark for igniting fuel.
4. What device proves flame presence in modern oil burners?
A. Thermostat
B. Limit switch
C. Cadmium sulfide (cad) cell
D. Aquastat
Rationale: A cad cell senses light from the flame to confirm
successful ignition and safe operation.
5. What is the purpose of a primary control?
A. Control fuel pressure
B. Adjust airflow
C. Manage burner operation and safety shutdown
D. Heat the oil
Rationale: The primary control monitors ignition and shuts down
the burner if no flame is detected.
6. What is the correct unit for measuring draft?
A. PSI
B. BTU
C. Volts
D. Inches of water column
Rationale: Draft is measured in inches of water column to
indicate pressure differences in the chimney.
7. What happens if combustion air is insufficient?
A. Cleaner combustion
B. Lower temperature
, C. Soot formation and incomplete combustion
D. Increased efficiency
Rationale: Insufficient air leads to incomplete combustion,
producing soot and carbon monoxide.
8. What tool is used to measure smoke levels in flue gas?
A. Manometer
B. Thermometer
C. Smoke tester
D. Multimeter
Rationale: A smoke tester evaluates soot levels to ensure proper
combustion.
9. What is the typical oil pump pressure for residential burners?
A. 10 psi
B. 50 psi
C. 100–150 psi
D. 300 psi
Rationale: Most residential oil burners operate between 100 and
150 psi for proper atomization.
10. What does a delayed ignition indicate?
A. Proper operation
B. Low fuel pressure
C. Accumulation of unburned fuel before ignition
D. Excess air
Rationale: Delayed ignition allows fuel buildup, causing a rough
or explosive start.
11. What is the function of a heat exchanger?
A. Store fuel
B. Increase airflow
C. Transfer heat to air or water
