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FIRST PUBLISH OCTOBER 2024
T7 HVAC ASE set 2 Questions and Answers
Technician A says a thermometer and pressure gauge are necessary to check a refrigerant container for
non-condensable gases(air). Technician B says excessive non-condensable gases(air) in the container may
be vented to the atmosphere. Who is right? - Ans:✔✔-Technician A is correct because a check for the
presence of non-condensable gases is performed by storing the container at 65*F or above for 12 hours
out of direct sunlight
With the A/C running at the 'MAX' setting, a thermometer reading the temperature coming from the
vent nearest the evaporator core swings from 32*F to 42*F. Technician A says this is normal and that the
temperature swings coincide with the cycling of the compressor. Technician B says that the cycling
indicated ice is forming and melting on the evaporator core. Who is right? - Ans:✔✔-Technician A
The compressor makes a rattling noise when it is operating. Technician A says the problem could be a
slipping belt. Technician B says the problem could be a defective compressor shaft bearing. Who is right?
- Ans:✔✔-Both technicians
An electric cooling fan fails to engage. Technician A says that the problem could be a defective coolant
temperature switch. Technician B says that the thermostat may be stuck open. Who is right? - Ans:✔✔-
Both technicians
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FIRST PUBLISH OCTOBER 2024
T7 HVAC ASE set 2 Questions and Answers
Technician A says a thermometer and pressure gauge are necessary to check a refrigerant container for
non-condensable gases(air). Technician B says excessive non-condensable gases(air) in the container may
be vented to the atmosphere. Who is right? - Ans:✔✔-Technician A is correct because a check for the
presence of non-condensable gases is performed by storing the container at 65*F or above for 12 hours
out of direct sunlight
With the A/C running at the 'MAX' setting, a thermometer reading the temperature coming from the
vent nearest the evaporator core swings from 32*F to 42*F. Technician A says this is normal and that the
temperature swings coincide with the cycling of the compressor. Technician B says that the cycling
indicated ice is forming and melting on the evaporator core. Who is right? - Ans:✔✔-Technician A
The compressor makes a rattling noise when it is operating. Technician A says the problem could be a
slipping belt. Technician B says the problem could be a defective compressor shaft bearing. Who is right?
- Ans:✔✔-Both technicians
An electric cooling fan fails to engage. Technician A says that the problem could be a defective coolant
temperature switch. Technician B says that the thermostat may be stuck open. Who is right? - Ans:✔✔-
Both technicians
Page 1/3
