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RETA Chapter 6 Review Quiz Questions and Answers with Complete Solutions UPDATED!!! All
of your answer are correct. Below is answer key with brief rationales
1. A rotary vane compressor has no significant starting load
because
Answer: Centrifugal force allows the blades to seal only when
the compressor is up to speed.
Rationale: At startup, the vanes are not yet thrown outward
against the cylinder wall, so the compressor does not
immediately build significant pressure/load. As speed increases,
centrifugal force seals the vanes and compression begins.
2. When suction pressure rises, the operator should
Answer: Start another compressor.
Rationale: Rising suction pressure indicates increased
refrigeration load. Starting additional compressor capacity helps
pull suction pressure back down to the desired setpoint.
3. Slugging can cause compressor damage because
Answer: The compressor is designed to pump vapor only.
Rationale: Compressors are vapor pumps. Liquid refrigerant or
oil entering the compression chamber can cause hydraulic
damage to valves, pistons, rods, and bearings.
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RETA Chapter 6 Review Quiz Questions and Answers with Complete Solutions UPDATED!!! All
of your answer are correct. Below is answer key with brief rationales
1. A rotary vane compressor has no significant starting load
because
Answer: Centrifugal force allows the blades to seal only when
the compressor is up to speed.
Rationale: At startup, the vanes are not yet thrown outward
against the cylinder wall, so the compressor does not
immediately build significant pressure/load. As speed increases,
centrifugal force seals the vanes and compression begins.
2. When suction pressure rises, the operator should
Answer: Start another compressor.
Rationale: Rising suction pressure indicates increased
refrigeration load. Starting additional compressor capacity helps
pull suction pressure back down to the desired setpoint.
3. Slugging can cause compressor damage because
Answer: The compressor is designed to pump vapor only.
Rationale: Compressors are vapor pumps. Liquid refrigerant or
oil entering the compression chamber can cause hydraulic
damage to valves, pistons, rods, and bearings.
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