Exam Questions And Correct Answers

Ohio Boiler Technician Level 2 Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• What is the primary purpose of a safety valve on a boiler?
• To control water level
• To regulate fuel flow
• To release excess pressure
• To measure temperature

Rationale: Safety valves are designed to prevent overpressure by

releasing steam when the pressure exceeds the set limit.

• Which of the following is a common cause of low water conditions in a

boiler?

• Excessive feedwater
• Overheating
• Leaks in the system 1 / 4

• High steam demand

Rationale: Low water conditions typically occur due to leaks, poor

feedwater supply, or failure of water level controls.

• What is the purpose of a boiler blowdown?
• To heat feedwater
• To remove sediment and maintain water quality
• To increase steam pressure
• To lubricate pumps

Rationale: Blowdown removes impurities and sediment that can

cause scale or corrosion inside the boiler.

• In boiler terminology, what does “superheated steam” mean?
• Steam at boiling point
• Steam heated beyond its boiling point at a given pressure
• Steam with water droplets
• Condensed steam

Rationale: Superheated steam is steam that has been heated beyond

the saturation temperature for its pressure, containing no water droplets.

• Which type of boiler is most commonly used in industrial applications

for high-pressure steam?

• Fire-tube boiler
• Water-tube boiler
• Electric boiler 2 / 4

• Waste heat boiler

Rationale: Water-tube boilers can handle higher pressures and

temperatures and are commonly used in industrial settings.

6. The flame safeguard control on a boiler is primarily used to:

• Increase efficiency
• Prevent fuel from being supplied if no flame is detected
• Monitor water level
• Regulate steam temperature

Rationale: Flame safeguard controls prevent dangerous fuel buildup

by ensuring fuel is only supplied when a flame is present.

• Which of the following is a direct result of scale buildup inside a

boiler?

• Improved heat transfer
• Reduced pressure
• Reduced efficiency and potential overheating
• Decreased fuel consumption

Rationale: Scale acts as an insulator, reducing heat transfer and

causing overheating, which can damage the boiler.

• A boiler operator notices a sudden drop in boiler pressure. Which of

the following is the most likely cause?

• Feedwater pump overworking
• Steam leak
• Burner failure 3 / 4

• Safety valve malfunction

Rationale: A sudden drop in pressure is often caused by a steam leak

in the system.

• Which code governs the construction and inspection of boilers in

Ohio?

• National Electrical Code

B. NFPA 70

• ASME Boiler and Pressure Vessel Code
• OSHA Safety Code

Rationale: The ASME Boiler and Pressure Vessel Code sets standards

for boiler construction and safety.

• When performing a boiler hydrostatic test, what is the primary

objective?

• Measure fuel efficiency
• Check water quality
• Verify the integrity of the boiler under pressure
• Adjust the burner

Rationale: A hydrostatic test pressurizes the boiler with water to

ensure there are no leaks or weaknesses in the structure.

• Which of the following instruments is used to measure steam

pressure in a boiler?

• Thermocouple
• Flow meter
• / 4