RI Journeyman's Refrigeration License (The Basics) Questions With 100% Correct Answers!!
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
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
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.
A Boudelot 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.
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
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
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.
A Boudelot 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.
