Texas Boiler Operator Exam Review with
Answers and Rationales | 100% Pass
Guaranteed | Graded A+
1. The primary purpose of a boiler is to:
A. Produce electricity
B. Heat air
C. Generate steam or hot water
D. Cool equipment
Boilers are designed to transfer heat to water to produce steam
or hot water for heating or process use.
2. A low-pressure steam boiler operates at pressures:
A. Above 150 psi
B. Above 300 psi
C. 15 psi or less
D. 50 psi or less
ASME defines low-pressure steam boilers as operating at 15 psi
or below.
3. A high-pressure boiler operates above:
A. 15 psi
B. 50 psi
C. 15 psi (steam) or 160 psi (hot water)
D. 300 psi
Anything above low-pressure limits is considered high-pressure.
4. The main heat transfer methods in a boiler are:
A. Compression and expansion
B. Radiation, convection, and conduction
C. Evaporation only
D. Circulation only
All three heat transfer modes occur inside a boiler.
, 5. The part of a boiler where combustion occurs is the:
A. Economizer
B. Furnace
C. Superheater
D. Blowdown tank
The furnace is the combustion chamber.
Boiler Components
6. The function of a safety valve is to:
A. Increase pressure
B. Prevent overpressure
C. Control water level
D. Regulate fuel
Safety valves automatically release pressure to prevent
explosions.
7. The gauge glass indicates:
A. Steam pressure
B. Fuel level
C. Water level
D. Flue gas temperature
Operators visually verify proper water level through the gauge
glass.
8. The device that measures boiler pressure is:
A. Thermometer
B. Flow meter
C. Pressure gauge
D. Sight glass
Pressure gauges display internal pressure.
9. A low-water cutoff is used to:
A. Increase efficiency
, B. Reduce fuel use
C. Shut down the burner when water is too low
D. Control steam flow
Low water can cause overheating and catastrophic failure.
10. The purpose of a feedwater pump is to:
A. Remove steam
B. Supply water to the boiler
C. Increase combustion air
D. Remove sediment
Feedwater replaces water lost as steam or blowdown.
Combustion and Fuel
11. Complete combustion requires:
A. Fuel only
B. Oxygen only
C. Heat only
D. Fuel, oxygen, and heat
These three elements form the combustion triangle.
12. Excess air is used to:
A. Reduce combustion
B. Increase pressure
C. Ensure complete combustion
D. Cool the boiler only
Proper excess air reduces carbon monoxide and soot.
13. The main component of natural gas is:
A. Propane
B. Butane
C. Methane
D. Hydrogen
Methane is the primary constituent.
Answers and Rationales | 100% Pass
Guaranteed | Graded A+
1. The primary purpose of a boiler is to:
A. Produce electricity
B. Heat air
C. Generate steam or hot water
D. Cool equipment
Boilers are designed to transfer heat to water to produce steam
or hot water for heating or process use.
2. A low-pressure steam boiler operates at pressures:
A. Above 150 psi
B. Above 300 psi
C. 15 psi or less
D. 50 psi or less
ASME defines low-pressure steam boilers as operating at 15 psi
or below.
3. A high-pressure boiler operates above:
A. 15 psi
B. 50 psi
C. 15 psi (steam) or 160 psi (hot water)
D. 300 psi
Anything above low-pressure limits is considered high-pressure.
4. The main heat transfer methods in a boiler are:
A. Compression and expansion
B. Radiation, convection, and conduction
C. Evaporation only
D. Circulation only
All three heat transfer modes occur inside a boiler.
, 5. The part of a boiler where combustion occurs is the:
A. Economizer
B. Furnace
C. Superheater
D. Blowdown tank
The furnace is the combustion chamber.
Boiler Components
6. The function of a safety valve is to:
A. Increase pressure
B. Prevent overpressure
C. Control water level
D. Regulate fuel
Safety valves automatically release pressure to prevent
explosions.
7. The gauge glass indicates:
A. Steam pressure
B. Fuel level
C. Water level
D. Flue gas temperature
Operators visually verify proper water level through the gauge
glass.
8. The device that measures boiler pressure is:
A. Thermometer
B. Flow meter
C. Pressure gauge
D. Sight glass
Pressure gauges display internal pressure.
9. A low-water cutoff is used to:
A. Increase efficiency
, B. Reduce fuel use
C. Shut down the burner when water is too low
D. Control steam flow
Low water can cause overheating and catastrophic failure.
10. The purpose of a feedwater pump is to:
A. Remove steam
B. Supply water to the boiler
C. Increase combustion air
D. Remove sediment
Feedwater replaces water lost as steam or blowdown.
Combustion and Fuel
11. Complete combustion requires:
A. Fuel only
B. Oxygen only
C. Heat only
D. Fuel, oxygen, and heat
These three elements form the combustion triangle.
12. Excess air is used to:
A. Reduce combustion
B. Increase pressure
C. Ensure complete combustion
D. Cool the boiler only
Proper excess air reduces carbon monoxide and soot.
13. The main component of natural gas is:
A. Propane
B. Butane
C. Methane
D. Hydrogen
Methane is the primary constituent.
