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1. What is the primary purpose of a boiler’s safety valve?
A) To increase pressure
B) To reduce water level
C) To relieve excess pressure
D) To circulate water
C) To relieve excess pressure
The safety valve prevents the boiler from exceeding its maximum
allowable pressure, protecting against explosions.
2. Which of the following is considered a fire-tube boiler?
A) Water flows through tubes, fire surrounds them
B) Fire flows through tubes, water surrounds them
C) Water and fire mix in the same chamber
D) Water is heated indirectly by electricity
B) Fire flows through tubes, water surrounds them
In fire-tube boilers, hot gases pass through tubes while water
surrounds them, transferring heat to the water.
3. What is the main function of a boiler’s feedwater pump?
A) Remove impurities from water
B) Increase water pressure and supply water to the boiler
C) Reduce boiler pressure
, D) Monitor combustion
B) Increase water pressure and supply water to the boiler
Feedwater pumps ensure that water enters the boiler at the proper
pressure for safe and efficient operation.
4. What is the purpose of a boiler water level gauge?
A) To measure pressure
B) To control fuel supply
C) To indicate water level inside the boiler
D) To detect leaks
C) To indicate water level inside the boiler
Maintaining proper water level prevents overheating of boiler tubes
and possible boiler failure.
5. Which type of scale is most damaging inside a boiler?
A) Rust
B) Calcium carbonate
C) Oil residue
D) Sand
B) Calcium carbonate
Calcium carbonate forms hard scale, reducing heat transfer and
potentially causing overheating and failure.
6. What is the typical inspection interval for a low-pressure boiler in
Florida?
A) Every 6 months
B) Annually
C) Every 3 years
D) Monthly
B) Annually
Florida regulations generally require annual inspections of low-
pressure boilers to ensure safety and compliance.
7. What is the recommended blowdown procedure for removing sediment
from a boiler?
A) Open the blowdown valve fully for a few seconds
B) Add chemicals to water
, C) Close the valve and heat the boiler
D) Replace the boiler
A) Open the blowdown valve fully for a few seconds
Blowdown removes sediment and sludge from the bottom of the boiler,
preventing scale buildup and corrosion.
8. Which instrument measures steam pressure in a boiler?
A) Thermometer
B) Manometer
C) Pressure gauge
D) Flow meter
C) Pressure gauge
A pressure gauge allows operators to monitor boiler pressure and
ensures it stays within safe limits.
9. What is the primary hazard of a boiler explosion?
A) Noise pollution
B) Property and personnel damage
C) Water contamination
D) Corrosion
B) Property and personnel damage
Explosions release enormous energy, causing injury, death, and
structural damage.
10.Which of the following is an example of a high-pressure boiler?
A) 15 psi steam boiler
B) 50 psi hot water boiler
C) 150 psi steam boiler
D) 10 psi water heater
C) 150 psi steam boiler
High-pressure boilers operate above 15 psi for steam or 160 psi for hot
water, requiring stricter regulations and inspection.
11.What is the purpose of the boiler’s fusible plug?
A) To relieve water pressure
B) To act as a low-water safety device
C) To burn fuel efficiently