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RAC 40 Quiz 3 review with complete solutions
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RAC 40 Quiz 3 review with complete solutions
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RAC 40 Quiz 3 review 2024-2025 withcomplete solutions
The _____ compressor is another positive displacement compressor and is used for
larger air conditioning and refrigeration applications. - Answers -Screw Compressor
The four (4) major components of a vapor compression refrigeration system are the
compressor, condenser, evaporator, and ________ ______. - Answers -Metering
device
The amount of heat a refrigerant contains with -40F as the 0 heat content reference
point is called - Answers -Enthalpy
From a performance standpoint, a substitute for R-12 is - Answers -R-134A
The ___________ __________ is referred to as a kinetic displacement compressor. -
Answers -Centrifugal Compressor
The refrigerant vapor picks up additional heat as it flows from the evaporator to the
compressor. The heat is picked up from the - Answers -Suction line
What is the purpose of the metering device? - Answers -Meters the flow of refrigerant
entering the evaporator, reduces the boiling point to create a pressure/temperature drop
When the refrigerant leaves the metering device, it is not 100% liquid. Why? - Answers -
Because flash gas occurs and causes the 100% liquid to turn into 25% vapor and 75%
liquid.
Rejects both sensible and latent heat from the refrigeration system. - Answers -
Condenser
Abort heat from the system - Answers -Evaporator
Is the heart of the refrigeration system - Answers -Compressor
A valve or small fixed-size tubing or orifice that meters liquid refrigerant into the
evaporator - Answers -Metering device
R-502 - Answers -Orchid
R-12 - Answers -White
, R-717 - Answers -Silver
R-11 - Answers -Orange
R-114 - Answers -Dark Blue
R-134a - Answers -Light Blue
R-113 - Answers -Purple
R-500 - Answers -Yellow Orange
R-22 - Answers -Green
Good ventilation is important when working around refrigeration equipment because
modern refrigerants ______. - Answers -Are heavier than air and may displace the
oxygen around you
The __________ relationship correlates the vapor pressure and the boiling point of
water and is the basis for controlling the cooling system's temperatures. - Answers -
Temperature/pressure
Which of the following refrigerants has the lowest boiling temperatures at atmospheric
pressure? - Answers -R-502
The compressor in a refrigeration system _______. - Answers -Pumps the refrigerant
throughout the system
A ton of refrigeration is equal to - Answers -288,000 Btu/24-Hr
The law requires technicians to recover refrigerant from all refrigeration systems so that
they ________. - Answers -Will not be released into the atmosphere, May be used
again, May be reclaimed for future use.
Refrigeration can be described as _______. - Answers -The process of removing heat
from a place where it isn't wanted to place where it makes little or no difference
The temperature inside the refrigerator fresh food section should be about _______. -
Answers -35 degrees F
The evaporator in a refrigeration system - Answers -Absorbs heat from the product to
be cooled
High temperature refrigeration is that produced by ________. - Answers -An air
conditioning system
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