Atlas screw air compressor shutdown

Try to turn the compressor by hand. It should be possible to turn it around. It should turn around smoothly, without any 'hickups' (be sure to completely shut down the air compressor!). Check the isolation of the motor windings. [pdf]

Drill rig operator army corps of engineers

Position Title: Drill Rig Operator (WG-5729-08) or Drill Rig Helper (WG-5729-05) Duties: Operates power auger and direct-push drill rigs conducting standard penetration test, augering, direct-push soil testing and soil sampling, and obtaining undisturbed soil and ground-water samples. [pdf]

Down-the-hole drill operator license examination

To achieve certification candidates must take the Drill Rig Operator Core written exam and at least one written specialty exam (Foundation Drill Rig and/or Anchor/Micropile Drill Rig), as well as the corresponding specialty practical exam. [pdf]