Practice question A receiver-drier is used in systems with a: Variable blower onlyThermostatic expansion valve (TXV)Fixed orifice tube onlyNo metering device Answer: B — Thermostatic expansion valve (TXV) The correct answer is shown above. Try the full quiz for additional practice. Practice more: ASE S7 Air Conditioning Systems & Controls (School Bus) Practice Questions - ASE S7 - Air Conditioning Systems & Controls (School Bus) Certification Exam →