1
Answers to End of Unit Questions
for
Fundamentals of HVACR
Second Edition
, 1
UNIT 1 REVIEW QUESTIONS ANSWER KEY
1-1) List some of the different ways that homes and buildings may be heated.
Wood, gas, oil, electric, solar, heat pumps, and geothermal heating systems
are used.
1-2) What were some of the primary heating fuels that early civilizations used?
Wood, peat, and coal remained the primary heating fuels for centuries.
1-3) When is it believed that ice was first artificially made for food storage?
First evidence of man making ice appeared more than 3,000 years ago, about
1000 B. C.
1-4) How did early man make ice?
The ice was produced in shallow clay plates, about the size of a saucer. The
water in these clay plates wept through the clay. This water dampened the
small straw mats holding the clay plates in racks a few feet above the ground.
The straw aided with evaporative cooling of the water. Under the right
conditions a thin film of ice would form overnight on each clay plate.
1-5) Why did some manufacturers spray water in factories in the early 1700’s?
Some manufacturers sprayed water in factories for cooling.
1-6) How did early Romans cool palaces?
The Romans packed ice and snow between double walls in the emperor’s
palaces.
1-7) What do the terms environmental heating and air conditioning refer to?
Primarily to the control of a space’s air temperature.
1-8) What do the terms process heated and cooled refer to?
They are used to aid in manufacturing or to keep equipment at the desired
temperature.
1-9) When did central warm air systems for residential and commercial applications
become well defined?
In 1908 the essential elements for heating, cooling, humidifying, dehumidifying
and filtering air were defined.
1-10) Who developed what is referred to as modern air conditioning?
Willis Carrier is often credited with the development of modern air
conditioning.
1-11) When did mass air conditioning of homes with window units begin?
1950s
1
, 2
1-12) Why is it important to freeze foods quickly?
The problem with freezing food slowly is that when ice crystals form over time,
they become much larger. These large sharp ice crystals grow through the cell
walls of the food; and when the food thaws, all of the nutrients in the food are
allowed to drain away.
1-13) Why do some businesses and/or local and state governments require criminal
background checks for HVACR workers?
To protect the public from potentially dangerous individuals involved with in-
home service work.
1-14) What size range might a commercial air conditioner fit into?
Systems may be as small as a fraction of a ton in size to several thousand tons
in cooling capacity.
1-15) Give an example of some of the types of equipment that a commercial
refrigeration technician might work on.
Examples of commercial equipment and systems include refrigeration
equipment found in supermarkets, convenience stores, restaurants, and other
food service establishments.
1-16) What type of things might an entry-level helper do?
Assist with the installation and service of residential and commercial systems,
assist in lifting, carrying, or placing equipment or components and also run
errands to pick up parts and clean up the area following installation or
service.
1-17) Whose job is it to do the initial installation process such as install the refrigerant
lines, electrical lines, thermostat and control lines, duct boots and duct run, as
well as setting the indoor and outdoor units?
Rough-in Installer
1-18) What skills must a service technician have?
Diagnose system problems and make the necessary repairs. Service
technicians must be skilled in diagnosing electrical problems, refrigerant
problems, and air distribution problems.
1-19) What are some of the things that a service manager must be able to do?
They must have good management skills, communication skills, and technical
expertise.
1-20) What is the ICE exam, and who might take it?
It is the industrial competency exam. This test is made available to students of
educational institutions to test their knowledge of fundamental and basic skills
necessary for entry-level HVACR technician positions.
2
, 3
1-21) What are some of the RSES’s activities?
It is concerned with the education of technicians and service managers and
with business improvement techniques.
3
Answers to End of Unit Questions
for
Fundamentals of HVACR
Second Edition
, 1
UNIT 1 REVIEW QUESTIONS ANSWER KEY
1-1) List some of the different ways that homes and buildings may be heated.
Wood, gas, oil, electric, solar, heat pumps, and geothermal heating systems
are used.
1-2) What were some of the primary heating fuels that early civilizations used?
Wood, peat, and coal remained the primary heating fuels for centuries.
1-3) When is it believed that ice was first artificially made for food storage?
First evidence of man making ice appeared more than 3,000 years ago, about
1000 B. C.
1-4) How did early man make ice?
The ice was produced in shallow clay plates, about the size of a saucer. The
water in these clay plates wept through the clay. This water dampened the
small straw mats holding the clay plates in racks a few feet above the ground.
The straw aided with evaporative cooling of the water. Under the right
conditions a thin film of ice would form overnight on each clay plate.
1-5) Why did some manufacturers spray water in factories in the early 1700’s?
Some manufacturers sprayed water in factories for cooling.
1-6) How did early Romans cool palaces?
The Romans packed ice and snow between double walls in the emperor’s
palaces.
1-7) What do the terms environmental heating and air conditioning refer to?
Primarily to the control of a space’s air temperature.
1-8) What do the terms process heated and cooled refer to?
They are used to aid in manufacturing or to keep equipment at the desired
temperature.
1-9) When did central warm air systems for residential and commercial applications
become well defined?
In 1908 the essential elements for heating, cooling, humidifying, dehumidifying
and filtering air were defined.
1-10) Who developed what is referred to as modern air conditioning?
Willis Carrier is often credited with the development of modern air
conditioning.
1-11) When did mass air conditioning of homes with window units begin?
1950s
1
, 2
1-12) Why is it important to freeze foods quickly?
The problem with freezing food slowly is that when ice crystals form over time,
they become much larger. These large sharp ice crystals grow through the cell
walls of the food; and when the food thaws, all of the nutrients in the food are
allowed to drain away.
1-13) Why do some businesses and/or local and state governments require criminal
background checks for HVACR workers?
To protect the public from potentially dangerous individuals involved with in-
home service work.
1-14) What size range might a commercial air conditioner fit into?
Systems may be as small as a fraction of a ton in size to several thousand tons
in cooling capacity.
1-15) Give an example of some of the types of equipment that a commercial
refrigeration technician might work on.
Examples of commercial equipment and systems include refrigeration
equipment found in supermarkets, convenience stores, restaurants, and other
food service establishments.
1-16) What type of things might an entry-level helper do?
Assist with the installation and service of residential and commercial systems,
assist in lifting, carrying, or placing equipment or components and also run
errands to pick up parts and clean up the area following installation or
service.
1-17) Whose job is it to do the initial installation process such as install the refrigerant
lines, electrical lines, thermostat and control lines, duct boots and duct run, as
well as setting the indoor and outdoor units?
Rough-in Installer
1-18) What skills must a service technician have?
Diagnose system problems and make the necessary repairs. Service
technicians must be skilled in diagnosing electrical problems, refrigerant
problems, and air distribution problems.
1-19) What are some of the things that a service manager must be able to do?
They must have good management skills, communication skills, and technical
expertise.
1-20) What is the ICE exam, and who might take it?
It is the industrial competency exam. This test is made available to students of
educational institutions to test their knowledge of fundamental and basic skills
necessary for entry-level HVACR technician positions.
2
, 3
1-21) What are some of the RSES’s activities?
It is concerned with the education of technicians and service managers and
with business improvement techniques.
3
