If an air compressor is fitted with a...

If an air compressor is fitted with a...

Question 1 of 270705eccef9bbacbc34ba4d455ca

If an air compressor is fitted with a hand-off-auto (H-O-A) control station, what statement concerning operation is true?

Question 1 of 27070

Q

If an air compressor is fitted with a hand-off-auto (H-O-A) control station, what statement concerning operation is true?

🔍 Key Concepts

• Hand (manual) mode vs. Auto mode on an H-O-A switch • How pressure switches control an air compressor cycling on and off • What happens to a compressor motor when operating with unloading vs. being completely stopped

💭 Think About

• First, think about what "hand" (manual) usually means for a motor: does it follow automatic controls, or does it run regardless of them? • Next, consider what "auto" usually means with respect to a pressure switch in a compressed air system: when does the motor start and stop? • Finally, ask yourself: if a compressor is running continuously, why would it need an unloader mechanism, and which mode would that be more appropriate for?

✅ Before You Answer

• Make sure you know that "cycle on and off" implies the motor is actually stopping and starting, not just unloading. • Clarify whether manual (hand) mode typically bypasses the automatic pressure control or uses it. • Verify which mode—hand or auto—is normally tied to the pressure switch so that the compressor only runs when air is needed.