BOILER FUNDAMENTALS CERTIFICATION
EXAM QUESTIONS AND VERIFIED ANSWERS
2026
▶ A water tube boiler with more than one drum has tubes connected
between what? Answer: Drums
▶ The evaporation of 34.5 lbs of water per hour from and at feed water
temperature of 212F equals how many BHP? Answer: 1 boiler horsepower
(BHP)
▶ What kind of stress occurs when two stresses act on an object pushing
from opposite directions toward the center of the object? Answer:
Compressive Stress
▶ A condensing boiler is a hot water heating boiler designed to recover
some of the heat energy that is normally lost to the atmosphere, how does
it do this? Answer: By condensing water vapor produced by burning fuel in
the boiler
▶ When the density of steam and water are the same it is know as what?
Answer: Critical pressure of steam
▶ An electric boiler is a boiler that uses electricity instead of fossil fuels,
how does the electric boiler transfer heat to the feed water? Answer: Strip
heat or electrodes
▶ Boilers are rated as high and low pressure, high pressure boilers have
an operating range of what? Answer: Above 15 psi and 6 BHP
▶ Boilers are rated as high and low pressure, low pressure boilers have an
operating range of what? Answer: 15 psi and below
, ▶ A complete boiler comes with what system included? Answer: A feed
water system, fuel system and draft fans
▶ Municipal refuse boilers use waste that would normally go where?
Answer: A landfill
▶ Shearing stress and tensile stress are major concerns with boilers, which
one described as two opposing parallel forces? Answer: Shearing
▶ What is the name of a device that adds sensible heat to superheated
water vapor? Answer: Super-heater
▶ Thermal efficiency is a ration of what two measurements? Answer: Heat
absorbed by the boiler and heat energy of the fuel
▶ How does a water tube boiler utilize the tubes used to transfer heat?
Answer: It uses the tubes to move water through them
▶ Where is the flame in a water tube boiler? Answer: Outside the tubes
▶ What can be used to lengthen the life of a refractory in a vertical or
horizontal boiler? Answer: A water wall
▶ A poorly operating draft system would cause what condition with boiler
flame? Answer: Incomplete combustion
▶ If a feed water system over feeds water into the boiler what can result?
Answer: Rupture
▶ the use of mechanical draft can be two different designs, name them?
Answer: Induced draft and forced draft
▶ What system controls the stem in a boiler? Answer: Steam system
▶ What must the oil burner accomplish to properly burn the fuel oil?
Answer: Atomize the oil
▶ Steam is referred to as live steam until what condition happens? Answer:
Drop in pressure
EXAM QUESTIONS AND VERIFIED ANSWERS
2026
▶ A water tube boiler with more than one drum has tubes connected
between what? Answer: Drums
▶ The evaporation of 34.5 lbs of water per hour from and at feed water
temperature of 212F equals how many BHP? Answer: 1 boiler horsepower
(BHP)
▶ What kind of stress occurs when two stresses act on an object pushing
from opposite directions toward the center of the object? Answer:
Compressive Stress
▶ A condensing boiler is a hot water heating boiler designed to recover
some of the heat energy that is normally lost to the atmosphere, how does
it do this? Answer: By condensing water vapor produced by burning fuel in
the boiler
▶ When the density of steam and water are the same it is know as what?
Answer: Critical pressure of steam
▶ An electric boiler is a boiler that uses electricity instead of fossil fuels,
how does the electric boiler transfer heat to the feed water? Answer: Strip
heat or electrodes
▶ Boilers are rated as high and low pressure, high pressure boilers have
an operating range of what? Answer: Above 15 psi and 6 BHP
▶ Boilers are rated as high and low pressure, low pressure boilers have an
operating range of what? Answer: 15 psi and below
, ▶ A complete boiler comes with what system included? Answer: A feed
water system, fuel system and draft fans
▶ Municipal refuse boilers use waste that would normally go where?
Answer: A landfill
▶ Shearing stress and tensile stress are major concerns with boilers, which
one described as two opposing parallel forces? Answer: Shearing
▶ What is the name of a device that adds sensible heat to superheated
water vapor? Answer: Super-heater
▶ Thermal efficiency is a ration of what two measurements? Answer: Heat
absorbed by the boiler and heat energy of the fuel
▶ How does a water tube boiler utilize the tubes used to transfer heat?
Answer: It uses the tubes to move water through them
▶ Where is the flame in a water tube boiler? Answer: Outside the tubes
▶ What can be used to lengthen the life of a refractory in a vertical or
horizontal boiler? Answer: A water wall
▶ A poorly operating draft system would cause what condition with boiler
flame? Answer: Incomplete combustion
▶ If a feed water system over feeds water into the boiler what can result?
Answer: Rupture
▶ the use of mechanical draft can be two different designs, name them?
Answer: Induced draft and forced draft
▶ What system controls the stem in a boiler? Answer: Steam system
▶ What must the oil burner accomplish to properly burn the fuel oil?
Answer: Atomize the oil
▶ Steam is referred to as live steam until what condition happens? Answer:
Drop in pressure
