1|Page
New Mexico (NM) Jr Journeyman Refrigeration –
Complete Study Guide & Practice Questions 2026
The temperature scale that freezes water at 32 deg. and boils water at
212 deg. is known as the ___________ scale - ANSWER -Fahrenheit
The temperature scale that freezes water at 0 deg. and boils water at
100 deg. is known as the __________ scale. - ANSWER -Centigrade
The definition of specific heat is _______________________ - ANSWER
-the amount of heat required to raise 1 lb of a substance 1 deg. F.
The definition of sensible heat is ______ - ANSWER -the heat that can
be measured by a thermometer.
The definition of latent heat is ______ - ANSWER -the heat used which
causes a change of state
The definition of a BTU is ________ - ANSWER -the amount of heat
required to raise 1 lb of water 1 deg. F
Heat energy is measured in _________ - ANSWER -BTU
pg. 1
,2|Page
Three states of matter are _________ - ANSWER -Solid, Liquid, and Gas
One ton of refrigeration is equal to __________ - ANSWER -12,000 btu
per hour
____________ is the type of heat that is absorbed or extracted from a
substance when the substance changes state - ANSWER -Latent Heat
When a substance changes from a liquid to a gas, this is known as
the________________ - ANSWER -latent heat of vaporization
When a substance changes from a gas to a liquid, this is known as
the________________ - ANSWER -latent heat of condensation.
When a substance changes from a solid to a gas, this is known as
the________________ - ANSWER -the latent heat of sublimation
In a refrigeration system, heat is absorbed by ______________ -
ANSWER -the latent heat of vaporization in the evaporator.
In a refrigeration system, heat is rejected by _________ - ANSWER -the
latent heat of condensation in the condenser.
Frost is - ANSWER -adsorbed by the evaporator
pg. 2
,3|Page
The relationship of absolute pressure on the low side to the absolute
pressure on the high side is called the ___________ - ANSWER -
compression ratio
________________________________ Is called the refrigerating effect
- ANSWER -The amount of heat absorbed by the refrigerant used
Generally speaking the ____________________ is the type of system
that gives the greatest rate of heat transfer - ANSWER -flooded
evaporator
________________ the total amount of heat present in a given
substance. - ANSWER -Enthalpy is
When hot air remains at the top of a room and cold air at the bottom
you will have an occurrence of a condition known as ___________ -
ANSWER -stratified air.
The ____ State of a substance will have the highest heat content. -
ANSWER -vapor
One cubic foot of air at 50 deg F can absorb _____________ - ANSWER
-less moisture than it could at 100 deg. F.
pg. 3
, 4|Page
A Baudelot cooler ________________ - ANSWER -is a heat exchanger
When placed in a bucket of water, the refrigeration effect of 32 deg F.
Ice will always be ______________ - ANSWER -144 btu per pound.
____________________________ Is called the ambient temperature. -
ANSWER -The temperature of the air that surrounds any object
The highest temperature at which vapor can be liquified regardless of
the pressure applied is called ___________________ - ANSWER -the
critical temperature of a substance.
The critical pressure of a substance is the pressure at which
____________ - ANSWER -a liquid cannot become a vapor by adding
heat.
The boiling point of water ______________ when salt is added -
ANSWER -increases
Heat travels in accordance with the __________________ - ANSWER -
second law of thermodynamics.
One degree day is __________________________ - ANSWER -
computed by taking the average of the highest and lowest
temperatures recorded for a given day and subtracting it from 65 deg. F
pg. 4
New Mexico (NM) Jr Journeyman Refrigeration –
Complete Study Guide & Practice Questions 2026
The temperature scale that freezes water at 32 deg. and boils water at
212 deg. is known as the ___________ scale - ANSWER -Fahrenheit
The temperature scale that freezes water at 0 deg. and boils water at
100 deg. is known as the __________ scale. - ANSWER -Centigrade
The definition of specific heat is _______________________ - ANSWER
-the amount of heat required to raise 1 lb of a substance 1 deg. F.
The definition of sensible heat is ______ - ANSWER -the heat that can
be measured by a thermometer.
The definition of latent heat is ______ - ANSWER -the heat used which
causes a change of state
The definition of a BTU is ________ - ANSWER -the amount of heat
required to raise 1 lb of water 1 deg. F
Heat energy is measured in _________ - ANSWER -BTU
pg. 1
,2|Page
Three states of matter are _________ - ANSWER -Solid, Liquid, and Gas
One ton of refrigeration is equal to __________ - ANSWER -12,000 btu
per hour
____________ is the type of heat that is absorbed or extracted from a
substance when the substance changes state - ANSWER -Latent Heat
When a substance changes from a liquid to a gas, this is known as
the________________ - ANSWER -latent heat of vaporization
When a substance changes from a gas to a liquid, this is known as
the________________ - ANSWER -latent heat of condensation.
When a substance changes from a solid to a gas, this is known as
the________________ - ANSWER -the latent heat of sublimation
In a refrigeration system, heat is absorbed by ______________ -
ANSWER -the latent heat of vaporization in the evaporator.
In a refrigeration system, heat is rejected by _________ - ANSWER -the
latent heat of condensation in the condenser.
Frost is - ANSWER -adsorbed by the evaporator
pg. 2
,3|Page
The relationship of absolute pressure on the low side to the absolute
pressure on the high side is called the ___________ - ANSWER -
compression ratio
________________________________ Is called the refrigerating effect
- ANSWER -The amount of heat absorbed by the refrigerant used
Generally speaking the ____________________ is the type of system
that gives the greatest rate of heat transfer - ANSWER -flooded
evaporator
________________ the total amount of heat present in a given
substance. - ANSWER -Enthalpy is
When hot air remains at the top of a room and cold air at the bottom
you will have an occurrence of a condition known as ___________ -
ANSWER -stratified air.
The ____ State of a substance will have the highest heat content. -
ANSWER -vapor
One cubic foot of air at 50 deg F can absorb _____________ - ANSWER
-less moisture than it could at 100 deg. F.
pg. 3
, 4|Page
A Baudelot cooler ________________ - ANSWER -is a heat exchanger
When placed in a bucket of water, the refrigeration effect of 32 deg F.
Ice will always be ______________ - ANSWER -144 btu per pound.
____________________________ Is called the ambient temperature. -
ANSWER -The temperature of the air that surrounds any object
The highest temperature at which vapor can be liquified regardless of
the pressure applied is called ___________________ - ANSWER -the
critical temperature of a substance.
The critical pressure of a substance is the pressure at which
____________ - ANSWER -a liquid cannot become a vapor by adding
heat.
The boiling point of water ______________ when salt is added -
ANSWER -increases
Heat travels in accordance with the __________________ - ANSWER -
second law of thermodynamics.
One degree day is __________________________ - ANSWER -
computed by taking the average of the highest and lowest
temperatures recorded for a given day and subtracting it from 65 deg. F
pg. 4
