Ct Gas Heating Contractor Exam –
Connecticut Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. A key purpose of a gas pressure regulator is to:
A. Increase gas temperature
B. Store excess gas
C. Reduce and maintain consistent downstream pressure
D. Measure gas consumption
Rationale: A gas pressure regulator ensures appliances receive gas at a safe,
steady pressure despite fluctuations in the supply line. It does not store gas,
measure usage, or alter temperature.
2. The most common gas used in residential heating systems is:
A. Butane
B. Propane-air mix
C. Coal gas
D. Natural gas
Rationale: Natural gas is widely used due to its availability, efficiency, and
cleaner combustion compared to other fuel gases.
, 3. A manometer is used to measure:
A. Temperature
B. Electrical resistance
C. Gas pressure
D. Air velocity
Rationale: A manometer is specifically designed to measure pressure differences
in gas systems, often in inches of water column.
4. The primary function of a thermocouple in a gas furnace is to:
A. Control blower speed
B. Ignite main burner
C. Sense pilot flame and control gas flow safety
D. Measure exhaust temperature
Rationale: The thermocouple generates a small voltage when heated by the
pilot flame, keeping the gas valve open for safe operation.
5. Combustion efficiency improves when:
A. Excess air is minimized completely
B. Fuel pressure is increased
C. Correct air-to-fuel ratio is maintained
D. Flame is yellow
Rationale: Proper combustion requires the correct mixture of air and fuel to
ensure complete burning and minimal waste gases.
6. The purpose of a flue in a heating system is to:
A. Supply combustion air
B. Filter incoming gas
C. Remove combustion gases safely outdoors
D. Increase burner pressure
, Rationale: Flues direct exhaust gases such as carbon monoxide safely outside the
building.
7. A yellow flame in a gas burner typically indicates:
A. Proper combustion
B. Excess air
C. Incomplete combustion
D. High gas pressure only
Rationale: Yellow flames indicate insufficient oxygen, leading to incomplete
combustion and soot formation.
8. The BTU is a measure of:
A. Pressure
B. Volume
C. Heat energy
D. Flow resistance
Rationale: British Thermal Units measure the amount of heat required to raise
the temperature of one pound of water by one degree Fahrenheit.
9. The main shutoff valve in a gas system is required to be:
A. Hidden inside equipment
B. Installed only outdoors
C. Readily accessible and clearly labeled
D. Locked permanently open
Rationale: Safety codes require the main shutoff to be accessible for emergency
gas isolation.
Connecticut Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. A key purpose of a gas pressure regulator is to:
A. Increase gas temperature
B. Store excess gas
C. Reduce and maintain consistent downstream pressure
D. Measure gas consumption
Rationale: A gas pressure regulator ensures appliances receive gas at a safe,
steady pressure despite fluctuations in the supply line. It does not store gas,
measure usage, or alter temperature.
2. The most common gas used in residential heating systems is:
A. Butane
B. Propane-air mix
C. Coal gas
D. Natural gas
Rationale: Natural gas is widely used due to its availability, efficiency, and
cleaner combustion compared to other fuel gases.
, 3. A manometer is used to measure:
A. Temperature
B. Electrical resistance
C. Gas pressure
D. Air velocity
Rationale: A manometer is specifically designed to measure pressure differences
in gas systems, often in inches of water column.
4. The primary function of a thermocouple in a gas furnace is to:
A. Control blower speed
B. Ignite main burner
C. Sense pilot flame and control gas flow safety
D. Measure exhaust temperature
Rationale: The thermocouple generates a small voltage when heated by the
pilot flame, keeping the gas valve open for safe operation.
5. Combustion efficiency improves when:
A. Excess air is minimized completely
B. Fuel pressure is increased
C. Correct air-to-fuel ratio is maintained
D. Flame is yellow
Rationale: Proper combustion requires the correct mixture of air and fuel to
ensure complete burning and minimal waste gases.
6. The purpose of a flue in a heating system is to:
A. Supply combustion air
B. Filter incoming gas
C. Remove combustion gases safely outdoors
D. Increase burner pressure
, Rationale: Flues direct exhaust gases such as carbon monoxide safely outside the
building.
7. A yellow flame in a gas burner typically indicates:
A. Proper combustion
B. Excess air
C. Incomplete combustion
D. High gas pressure only
Rationale: Yellow flames indicate insufficient oxygen, leading to incomplete
combustion and soot formation.
8. The BTU is a measure of:
A. Pressure
B. Volume
C. Heat energy
D. Flow resistance
Rationale: British Thermal Units measure the amount of heat required to raise
the temperature of one pound of water by one degree Fahrenheit.
9. The main shutoff valve in a gas system is required to be:
A. Hidden inside equipment
B. Installed only outdoors
C. Readily accessible and clearly labeled
D. Locked permanently open
Rationale: Safety codes require the main shutoff to be accessible for emergency
gas isolation.
