ASE H7 HVAC (Transit Bus) Practice Questions - ASE H7 - Heating, Ventilation & Air Conditioning (Transit Bus) Certification Exam

On a large transit-bus A/C system, refrigerant charge is most accurately set by:

Sight glass clarity only Charging by weight to the OEM specification Filling until the low side reaches 30 psi Adding refrigerant until frost forms on the accumulator

Correct Answer:

Charging by weight to the OEM specification

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