Maryland Boiler License Exam
Questions and Correct Answers
Already Passed
As the steam pressure increases in a boiler, there is a corresponding increase in the -
Answer-boiling temperature of the water in the boiler
Complete combustion is - Answer-burning all the fuel with the proper amount of excess
air
When testing a safety valve by hand on a low pressure steam boiler, the boiler must be
at a minimum pressure of __________before - Answer-5 psi
Draft in a boiler is measured in - Answer-inches of water
A positive pressure before the furnace indicates __________draft. - Answer-forced
Preparation for a boiler inspection requires having the boiler - Answer-cool, opened, and
thoroughly cleaned
A __________receives a signal representing a variable, such as temperature, pressure,
or flow, and converts that signal into an electrical or digital signal that is compatible with
a digital control system. - Answer-transducer
A fan located between the breeching and the stack is a(n) - Answer-induced draft fan
Class _______fires are electrical fires, such as motor or transformer fires. - Answer-С
A main steam stop valve would most likely be a(n) - Answer-os&y gate valve
The evaporation of 34.5 pounds of water per hour from and at 212°F is defined as -
Answer-latent heat of fusion
A compound gauge is a pressure gauge that indicates - Answer-vacuum in inches of
mercury or pressure in psi on the same gauge
, When burning No. 6 fuel oil, a(n) _______is required. - Answer-fuel oil heater
A _________prevents the flow of boiler water back to the city water supply. - Answer-
backflow preventer
The amount of energy in a fuel is the - Answer-heating value
_____________is the accumulation of minerals such as calcium and magnesium on
boiler heating surfaces. - Answer-Scale
The number of blowdowns required is determined by - Answer-boiler water analysis
А __________pump is a boiler accessory used to draw condensate back from the
system by producing negative pressure on the condensate return lines. - Answer-
Vacuum
Oxygen in the boiler water causes - Answer-pitting
A therm is equivalent to________ Btu - Answer-100,000
A(n) ________draft fan is located before the furnace. - Answer-forced
Impurities that increase the surface tension of boiler water are removed with a
__________blowdown. - Answer-surface
The primary function of the water column on a low pressure boiler is to - Answer-reduce
water turbulence
The boiler vent is opened when - Answer-warming the boiler and draining the boiler
A low water condition requires ___________ immediately. - Answer-securing fuel to the
burner
Soot buildup on heating surfaces - Answer-prevents heat transfer to boiler water
True or False Oxygen is required for the combustion of fuel. - Answer-True
True or false- A siphon is located between the boiler and steam pressure gauge to
prevent water from entering the Bourdon tube. - Answer-False
True or False- At the NOWL, the gauge glass is approximately half full. - Answer-True
True or False- A low water condition in the boiler can cause overheating of the tubes. -
Answer-True
Questions and Correct Answers
Already Passed
As the steam pressure increases in a boiler, there is a corresponding increase in the -
Answer-boiling temperature of the water in the boiler
Complete combustion is - Answer-burning all the fuel with the proper amount of excess
air
When testing a safety valve by hand on a low pressure steam boiler, the boiler must be
at a minimum pressure of __________before - Answer-5 psi
Draft in a boiler is measured in - Answer-inches of water
A positive pressure before the furnace indicates __________draft. - Answer-forced
Preparation for a boiler inspection requires having the boiler - Answer-cool, opened, and
thoroughly cleaned
A __________receives a signal representing a variable, such as temperature, pressure,
or flow, and converts that signal into an electrical or digital signal that is compatible with
a digital control system. - Answer-transducer
A fan located between the breeching and the stack is a(n) - Answer-induced draft fan
Class _______fires are electrical fires, such as motor or transformer fires. - Answer-С
A main steam stop valve would most likely be a(n) - Answer-os&y gate valve
The evaporation of 34.5 pounds of water per hour from and at 212°F is defined as -
Answer-latent heat of fusion
A compound gauge is a pressure gauge that indicates - Answer-vacuum in inches of
mercury or pressure in psi on the same gauge
, When burning No. 6 fuel oil, a(n) _______is required. - Answer-fuel oil heater
A _________prevents the flow of boiler water back to the city water supply. - Answer-
backflow preventer
The amount of energy in a fuel is the - Answer-heating value
_____________is the accumulation of minerals such as calcium and magnesium on
boiler heating surfaces. - Answer-Scale
The number of blowdowns required is determined by - Answer-boiler water analysis
А __________pump is a boiler accessory used to draw condensate back from the
system by producing negative pressure on the condensate return lines. - Answer-
Vacuum
Oxygen in the boiler water causes - Answer-pitting
A therm is equivalent to________ Btu - Answer-100,000
A(n) ________draft fan is located before the furnace. - Answer-forced
Impurities that increase the surface tension of boiler water are removed with a
__________blowdown. - Answer-surface
The primary function of the water column on a low pressure boiler is to - Answer-reduce
water turbulence
The boiler vent is opened when - Answer-warming the boiler and draining the boiler
A low water condition requires ___________ immediately. - Answer-securing fuel to the
burner
Soot buildup on heating surfaces - Answer-prevents heat transfer to boiler water
True or False Oxygen is required for the combustion of fuel. - Answer-True
True or false- A siphon is located between the boiler and steam pressure gauge to
prevent water from entering the Bourdon tube. - Answer-False
True or False- At the NOWL, the gauge glass is approximately half full. - Answer-True
True or False- A low water condition in the boiler can cause overheating of the tubes. -
Answer-True
