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

Correct Answer: Option A — In the hand mode, the compressor will run continuously with unloading.

In 'Hand' mode, the compressor bypasses automatic pressure-sensing controls and runs continuously. To prevent over-pressurization and motor damage, the unit must be equipped with an unloader mechanism that keeps the compressor in a no-load state, allowing the motor to run without compressing air until the operator manually stops it.