Preview Questions CNC Operator | Role Specific Skill

Question 1: When experiencing inaccurate part dimensions despite correct programming, what should be the first troubleshooting step?

Which action should you take?

Choose only one option

Verify the machine calibration and check tool offsets

Increase the spindle speed to reduce cutting time

Change the part material to see if it affects the accuracy

Ignore the discrepancy and hope for better results later

Question 2: How can an operator verify the accuracy of a CNC machine's tool offsets?

Which action should you take?

Choose only one option

By visually inspecting the tool and manually adjusting it

By assuming the offsets are correct after each machine start-up

By guessing the tool offset and adjusting the machine

By performing a tool length measurement and adjusting offsets based on the results

Question 3: How do you troubleshoot a CNC machine that consistently produces excessive tool wear?

Which action should you take?

Choose only one option

Perform a machine calibration without checking the tool condition

Check the tool offset, reduce feed rates, and adjust cutting parameters

Ignore the issue as long as the parts are within tolerance

Increase the tool speed to avoid wear

Question 4: How should an operator address a misalignment issue between the tool and the workpiece?

Which action should you take?

Choose only one option

Ignore the misalignment and proceed with the workpiece

Use a larger tool to ?correct? the misalignment

Increase the tool speed to compensate for the misalignment

Re-align the machine axes, check the tool offsets, and re-zero the tool

Question 5: How should a CNC Operator optimize a program when switching between roughing and finishing passes?

Which action should you take?

Choose only one option

Use the same feed rates for both roughing and finishing passes

Program the roughing pass with higher feed rates and depths, and the finishing pass with slower speeds for precision

Focus only on roughing and assume finishing will be correct

Increase the spindle speed for both passes

Question 6: What should be checked if the CNC machine's movement is jerky or not smooth?

Which action should you take?

Choose only one option

The axis lubrication, servo system, and backlash compensation

The color of the machine's exterior

The machine's temperature and cooling system

The spindle speed and coolant flow