A technician compares a scroll compressor with a reciprocating compressor of similar capacity. Which statement correctly describes normal scroll compressor operation? A It cannot be built as a hermetic unit and must be belt driven. B It uses spring-loaded suction and discharge reed valves that seat on every stroke. C It compresses refrigerant continuously between one fixed and one orbiting scroll and has no suction or discharge reed valves. D It pumps during only half of each revolution, so its discharge flow is strongly pulsating.
Practice questions based on the published NATE knowledge areas and standard HVACR theory and service practice. NATE is a mark of North American Technician Excellence; this site is not affiliated with or endorsed by NATE. NATE certification is not a licence — HVAC licensing is set by your state and locality. Confirm current exam requirements with NATE and current code requirements with the authority having jurisdiction.
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