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