P99 LOW PRESSURE BOILERS
EXAM REVIEWED QUESTIONS AND
CORRECT ANSWERS
An internal furnace is a furnace in a boiler that is
surrounded by a heating surface.
true
Steam is the vapor that forms when water is heated to
its boiling point.
true
___ applications use steam to produce heat, force,
and/or mechanical action in a production application.
processs
The greatest impact of the use of steam power
occurred during the Industrial Revolution of the
eighteenth century and early nineteenth century.
true
___ is commonly used for heating or process
applications.
steam
___ is credited with the development of the
reciprocating steam engine.
james watt
A boiler is an open metal container in which water is
heated to produce steam or heated water.
false
Heat is generated in a boiler by the combustion of a
fuel such as gas or fuel oil.
,true
Conduction is heat transfer that occurs when
molecules in a material are heated and the heat is
passed from molecule to molecule through the
material.
true
Feedwater is water that is treated for use in a boiler.
true
Heat always flows from a material having a lower
temperature to a material having a higher temperature.
false
The Fahrenheit scale uses 0°F as the freezing point of
salt water and provides a larger number of increments
between the freezing point of pure water (32°F) and
boiling point of pure water (___°F) compared to the
Celsius scale.
212
___ is the process of reducing fuel oil into a fine spray
of minute particles.
atomization
A ___ is used to reduce utility water pressure to
prevent overpressure in a system.
pressure regulator
A ___ is used to transfer heat from one substance to
another without allowing the materials to mix.
heat exchanger
Perfect combustion is combustion that occurs when
all the fuel is burned with a minimum amount of
excess air remaining.
,false
perfect combustion needs all fuel to be burned
During operation, a ___ holds water, transfers heat to
the water to make steam, and collects the steam that
is produced.
steam boiler
A backflow preventer is a boiler accessory that
prevents the flow of water back to the potable water
supply.
true
___ is the process that occurs when enough heat is
added or removed to change a substance from one
physical form to another.
change of state
The ___ is the part of a boiler with water on one side
and heat from gases of combustion on the other.
heating surface
___ is the form of energy identified by a temperature
difference or a change of state.
heat
Approximately 212 lb of air are required to burn a
pound of fuel.
false
15.1 lb of air
Heat is transferred by ___.
conduction, convection, and radiation
___ air is air supplied to a burner above the theoretical
amount required to burn the fuel to ensure complete
combustion.
, Excess
___ is heat transfer that occurs when currents
circulate between warm and cool regions of a fluid.
convection
A gas law relates to events that occur as heat is
generated by the combustion of a fuel and is used to
produce steam or hot water in a boiler.
false
water
Steam that has given up its heat and turned back to
water is boiler water.
false
condensates
Steam is produced as water is heated at its boiling
point (212°F at atmospheric pressure).
true
Sensible heat is heat that ___.
can be measured with a thermometer or sensed by a
person
Latent heat is heat identified by a change of state and
no temperature change of the substance.
true
The amount of energy required to raise the
temperature of 1 lb of water 1°F is 1 ___.
btu
Saturated steam is pure steam at a temperature that
corresponds to the boiling point of water at a specific
pressure.
true
EXAM REVIEWED QUESTIONS AND
CORRECT ANSWERS
An internal furnace is a furnace in a boiler that is
surrounded by a heating surface.
true
Steam is the vapor that forms when water is heated to
its boiling point.
true
___ applications use steam to produce heat, force,
and/or mechanical action in a production application.
processs
The greatest impact of the use of steam power
occurred during the Industrial Revolution of the
eighteenth century and early nineteenth century.
true
___ is commonly used for heating or process
applications.
steam
___ is credited with the development of the
reciprocating steam engine.
james watt
A boiler is an open metal container in which water is
heated to produce steam or heated water.
false
Heat is generated in a boiler by the combustion of a
fuel such as gas or fuel oil.
,true
Conduction is heat transfer that occurs when
molecules in a material are heated and the heat is
passed from molecule to molecule through the
material.
true
Feedwater is water that is treated for use in a boiler.
true
Heat always flows from a material having a lower
temperature to a material having a higher temperature.
false
The Fahrenheit scale uses 0°F as the freezing point of
salt water and provides a larger number of increments
between the freezing point of pure water (32°F) and
boiling point of pure water (___°F) compared to the
Celsius scale.
212
___ is the process of reducing fuel oil into a fine spray
of minute particles.
atomization
A ___ is used to reduce utility water pressure to
prevent overpressure in a system.
pressure regulator
A ___ is used to transfer heat from one substance to
another without allowing the materials to mix.
heat exchanger
Perfect combustion is combustion that occurs when
all the fuel is burned with a minimum amount of
excess air remaining.
,false
perfect combustion needs all fuel to be burned
During operation, a ___ holds water, transfers heat to
the water to make steam, and collects the steam that
is produced.
steam boiler
A backflow preventer is a boiler accessory that
prevents the flow of water back to the potable water
supply.
true
___ is the process that occurs when enough heat is
added or removed to change a substance from one
physical form to another.
change of state
The ___ is the part of a boiler with water on one side
and heat from gases of combustion on the other.
heating surface
___ is the form of energy identified by a temperature
difference or a change of state.
heat
Approximately 212 lb of air are required to burn a
pound of fuel.
false
15.1 lb of air
Heat is transferred by ___.
conduction, convection, and radiation
___ air is air supplied to a burner above the theoretical
amount required to burn the fuel to ensure complete
combustion.
, Excess
___ is heat transfer that occurs when currents
circulate between warm and cool regions of a fluid.
convection
A gas law relates to events that occur as heat is
generated by the combustion of a fuel and is used to
produce steam or hot water in a boiler.
false
water
Steam that has given up its heat and turned back to
water is boiler water.
false
condensates
Steam is produced as water is heated at its boiling
point (212°F at atmospheric pressure).
true
Sensible heat is heat that ___.
can be measured with a thermometer or sensed by a
person
Latent heat is heat identified by a change of state and
no temperature change of the substance.
true
The amount of energy required to raise the
temperature of 1 lb of water 1°F is 1 ___.
btu
Saturated steam is pure steam at a temperature that
corresponds to the boiling point of water at a specific
pressure.
true
