A system operating with a low superheat and a low subcooling most likely has:
A) A refrigerant restriction. B) Low evaporator airflow.
C) An overfeeding refrigerant metering device. D) Low condenser airflow.
C
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"Rust dust" is an indication of what fault?
A) Broken blocker rings B) Worn steel parts such as U-joints C) Fluid leak D) A slipping clutch
A device used to separate liquids from gases and return them to a condensate header.
a. strainer b. steam bucket c. steam trap d. check valve
At typical operating conditions, the high efficiency air-conditioning system will operate with an evaporator boiling point of ____°F.
A. 40 B. 45 C. 50 D. 55
Heavy duty relays are not suitable as switching relays because they have:
A) Larger contacts with less resistance. B) Smaller contacts with less resistance. C) Larger contacts with more resistance. D) Smaller contacts with more resistance.