AHR-110 EXAM 3 STUDY GUIDE |COMPLETE STUDY GUIDE WITH
100% ACCURATE QUESTIONS &ANSWERS ALREADY GRADED A+
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
, AHR-110 EXAM 3 STUDY GUIDE |COMPLETE STUDY GUIDE WITH
100% ACCURATE QUESTIONS &ANSWERS ALREADY GRADED A+
The low-pressure side of the system must not be pressurized to more than_________ when testing for
leaks. - (ANSWER)The low-side design pressure
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
100% ACCURATE QUESTIONS &ANSWERS ALREADY GRADED A+
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
, AHR-110 EXAM 3 STUDY GUIDE |COMPLETE STUDY GUIDE WITH
100% ACCURATE QUESTIONS &ANSWERS ALREADY GRADED A+
The low-pressure side of the system must not be pressurized to more than_________ when testing for
leaks. - (ANSWER)The low-side design pressure
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
