NORA Bronze 2026-2027 Comprehensive
Frequently Tested Questions With Verified
Multiple Choice and Conceptual Actual 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update!!
1. When combustion gases become too cold, what condition occurs?
A. Draft increases
B. Excess air decreases
C. Water vapor in the flue gas condenses
D. CO₂ levels rise
Correct answer: C
2. What is a power venter and what is its function?
A. A damper that regulates draft
B. A fan that pulls combustion products through the heat exchanger and out of
the building
C. A control that shuts off the burner
D. A device that supplies combustion air
Correct answer: B
3. A direct vent system relies on which of the following to push combustion
gases out of the building?
A. Chimney draft only
B. Natural convection
C. Burner operation, pre-purge and post-purge controls, and proper installation
,D. Barometric damper
Correct answer: C
4. A sealed-shut draft regulator will cause:
A. Insufficient draft
B. Neutral draft conditions
C. Too much draft over the fire
D. Excess combustion air blockage
Correct answer: C
5. Chimney draft is affected by which factors?
A. Oil pressure and nozzle size
B. Temperature difference, barometric pressure, humidity, and wind
C. Pump speed and motor RPM
D. Combustion chamber size only
Correct answer: B
6. Air is composed of approximately:
A. 18% oxygen and 80% nitrogen
B. 20.9% oxygen and 78% nitrogen
C. 25% oxygen and 70% nitrogen
D. 21% oxygen and 70% nitrogen
Correct answer: B
7. A liquid CO₂ tester must be pumped how many times for a proper reading?
A. 10 times
B. 15 times
C. 18 times
,D. 25 times
Correct answer: C
8. The fluid in a wet-kit CO₂ tester is typically effective for approximately:
A. 50 tests
B. 100 tests
C. 150 tests
D. 200 tests
Correct answer: D
9. A complete combustion test includes measurement of:
A. Voltage and amperage
B. Stack temperature, draft, smoke, and excess air (CO₂ / O₂)
C. Fuel pressure and nozzle size
D. Flame color only
Correct answer: B
10. Incomplete combustion and carbon monoxide production are caused by:
A. Proper draft and clean burners
B. Too little air, too much air, or flame impingement
C. High oil pressure only
D. Excess CO₂
Correct answer: B
11. A CO₂ reading of 7% at the breech and 10% over the fire indicates:
A. Proper combustion
B. Excess fuel input
C. Excess air leaks into the furnace or boiler
, D. Plugged heat exchanger
Correct answer: C
12. Increasing the amount of air supplied to the fire will generally increase:
A. CO₂ levels
B. Flame temperature
C. Stack temperature
D. Combustion efficiency
Correct answer: C
13. An electrical circuit for an oil burner will contain:
A. Only conductors
B. A power source and transformer
C. Conductors, switches, and loads
D. Loads only
Correct answer: C
14. The heat anticipator in a thermostat should be set to:
A. Line voltage
B. Room temperature
C. The amperage draw of the control circuit
D. Maximum burner input
Correct answer: C
15. When components of an igniter begin to break down, this primarily affects
the:
A. Oil pressure
B. Draft level
Frequently Tested Questions With Verified
Multiple Choice and Conceptual Actual 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update!!
1. When combustion gases become too cold, what condition occurs?
A. Draft increases
B. Excess air decreases
C. Water vapor in the flue gas condenses
D. CO₂ levels rise
Correct answer: C
2. What is a power venter and what is its function?
A. A damper that regulates draft
B. A fan that pulls combustion products through the heat exchanger and out of
the building
C. A control that shuts off the burner
D. A device that supplies combustion air
Correct answer: B
3. A direct vent system relies on which of the following to push combustion
gases out of the building?
A. Chimney draft only
B. Natural convection
C. Burner operation, pre-purge and post-purge controls, and proper installation
,D. Barometric damper
Correct answer: C
4. A sealed-shut draft regulator will cause:
A. Insufficient draft
B. Neutral draft conditions
C. Too much draft over the fire
D. Excess combustion air blockage
Correct answer: C
5. Chimney draft is affected by which factors?
A. Oil pressure and nozzle size
B. Temperature difference, barometric pressure, humidity, and wind
C. Pump speed and motor RPM
D. Combustion chamber size only
Correct answer: B
6. Air is composed of approximately:
A. 18% oxygen and 80% nitrogen
B. 20.9% oxygen and 78% nitrogen
C. 25% oxygen and 70% nitrogen
D. 21% oxygen and 70% nitrogen
Correct answer: B
7. A liquid CO₂ tester must be pumped how many times for a proper reading?
A. 10 times
B. 15 times
C. 18 times
,D. 25 times
Correct answer: C
8. The fluid in a wet-kit CO₂ tester is typically effective for approximately:
A. 50 tests
B. 100 tests
C. 150 tests
D. 200 tests
Correct answer: D
9. A complete combustion test includes measurement of:
A. Voltage and amperage
B. Stack temperature, draft, smoke, and excess air (CO₂ / O₂)
C. Fuel pressure and nozzle size
D. Flame color only
Correct answer: B
10. Incomplete combustion and carbon monoxide production are caused by:
A. Proper draft and clean burners
B. Too little air, too much air, or flame impingement
C. High oil pressure only
D. Excess CO₂
Correct answer: B
11. A CO₂ reading of 7% at the breech and 10% over the fire indicates:
A. Proper combustion
B. Excess fuel input
C. Excess air leaks into the furnace or boiler
, D. Plugged heat exchanger
Correct answer: C
12. Increasing the amount of air supplied to the fire will generally increase:
A. CO₂ levels
B. Flame temperature
C. Stack temperature
D. Combustion efficiency
Correct answer: C
13. An electrical circuit for an oil burner will contain:
A. Only conductors
B. A power source and transformer
C. Conductors, switches, and loads
D. Loads only
Correct answer: C
14. The heat anticipator in a thermostat should be set to:
A. Line voltage
B. Room temperature
C. The amperage draw of the control circuit
D. Maximum burner input
Correct answer: C
15. When components of an igniter begin to break down, this primarily affects
the:
A. Oil pressure
B. Draft level
