AHR-110 EXAM 3 STUDY GUIDE |COMPLETE STUDY
GUIDE WITH 100% ACCURATE QUESTIONS
&ANSWERS. EXCELLENCE GUARANTEED.
The most common type of system leaks are __________ leaks. Answer: Standing
A(n) ____________ leak detector requires a lubricant-specific dye be injected into a
charged system to find the leak. Answer: Ultraviolet
Removing air and/or other noncondensable gases from a system using a vacuum
pump is called ___________. Answer: Degassing
The process of removing both noncondensable gases and water vapor is called
________. Answer: Evacuation
Sludge and other solids can be removed from a system by using __________.
Answer: liquid- and suction-line filter/driers
Atmospheric pressure, 0 psig, is the equivalent of about __________ microns.
Answer: 760,000
(T/F): The process of a solid changing to a vapor without passing through the liquid
state is called dehydration. Answer: False
(T/F): A system with Schrader valve gauge ports will take longer to evacuate than a
system with service valves. Answer: True
A ¼ inch service hose will only allow a vacuum pump to pull at _____ CFM,
regardless of the pump's CFM rating. Answer: 0.8
The mechanical strain of motion, rotation, and refrigerant flow are all associated
with _________ leaks. Answer: Vibration-Dependent
The low-pressure side of the system must not be pressurized to more
than_________ when testing for leaks. Answer: The low-side design pressure
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, Standing, pressure-dependent, temperature-dependent, vibration-dependent,
combination-dependent, and micro are all types of Answer: Leak Methods
The _____________ is both the greatest asset and the greatest liability of an
electronic leak detector. Answer: Sensitivity
A deep vacuum can most accurately be measured in Answer: Microns
Which of the tools used during the evacuation process can be wireless and use
Bluetooth technology? Answer: Micron Gauge
A ___________ can remove any type of foreign matter that enters a refrigeration
system. Answer: Filter Drier
Moisture, acid buildup, and copper plating can all be caused by which of the
following? Answer: Air in the System
The only two substances that should be circulating in a refrigeration system are
Answer: Refrigerant and Oil
In order to remove moisture from a refrigeration system using a vacuum pump, it
must be in a ____________state. Answer: Vapor
When checking for a leak in the evaporator coil, the leak detector can be placed
Answer: In the drain outlet
Two types of evacuation methods used by technicians are Answer: Deep vacuum
and triple evacuation.
An evacuation process that is performed a number of times with nitrogen being
used to break the vacuum, and ends with a deep vacuum is known as Answer:
Triple Evacuation
A system that is equipped with a _____________ may require additional steps to
ensure that the entire system is evacuated. Answer: Solenoid Valve
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
GUIDE WITH 100% ACCURATE QUESTIONS
&ANSWERS. EXCELLENCE GUARANTEED.
The most common type of system leaks are __________ leaks. Answer: Standing
A(n) ____________ leak detector requires a lubricant-specific dye be injected into a
charged system to find the leak. Answer: Ultraviolet
Removing air and/or other noncondensable gases from a system using a vacuum
pump is called ___________. Answer: Degassing
The process of removing both noncondensable gases and water vapor is called
________. Answer: Evacuation
Sludge and other solids can be removed from a system by using __________.
Answer: liquid- and suction-line filter/driers
Atmospheric pressure, 0 psig, is the equivalent of about __________ microns.
Answer: 760,000
(T/F): The process of a solid changing to a vapor without passing through the liquid
state is called dehydration. Answer: False
(T/F): A system with Schrader valve gauge ports will take longer to evacuate than a
system with service valves. Answer: True
A ¼ inch service hose will only allow a vacuum pump to pull at _____ CFM,
regardless of the pump's CFM rating. Answer: 0.8
The mechanical strain of motion, rotation, and refrigerant flow are all associated
with _________ leaks. Answer: Vibration-Dependent
The low-pressure side of the system must not be pressurized to more
than_________ when testing for leaks. Answer: The low-side design pressure
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, Standing, pressure-dependent, temperature-dependent, vibration-dependent,
combination-dependent, and micro are all types of Answer: Leak Methods
The _____________ is both the greatest asset and the greatest liability of an
electronic leak detector. Answer: Sensitivity
A deep vacuum can most accurately be measured in Answer: Microns
Which of the tools used during the evacuation process can be wireless and use
Bluetooth technology? Answer: Micron Gauge
A ___________ can remove any type of foreign matter that enters a refrigeration
system. Answer: Filter Drier
Moisture, acid buildup, and copper plating can all be caused by which of the
following? Answer: Air in the System
The only two substances that should be circulating in a refrigeration system are
Answer: Refrigerant and Oil
In order to remove moisture from a refrigeration system using a vacuum pump, it
must be in a ____________state. Answer: Vapor
When checking for a leak in the evaporator coil, the leak detector can be placed
Answer: In the drain outlet
Two types of evacuation methods used by technicians are Answer: Deep vacuum
and triple evacuation.
An evacuation process that is performed a number of times with nitrogen being
used to break the vacuum, and ends with a deep vacuum is known as Answer:
Triple Evacuation
A system that is equipped with a _____________ may require additional steps to
ensure that the entire system is evacuated. Answer: Solenoid Valve
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
