Diesel Technician
Posted Sep 2, 2026 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
How do you keep yourself and others safe in a busy shop?
What they are checking: Whether they follow lockout, lifting and jack stand practices without being reminded.
Tell me about a time you helped a less experienced tech.
What they are checking: Whether they share knowledge and support the team, which strengthens a shop.
How do you make sure your work order notes are clear and complete?
What they are checking: Whether they document repairs well for DOT records, warranty and the next tech.
What would you do
You finish a repair but aren't fully sure it fixed the problem. What do you do?
What they are checking: Whether they verify the fix with a test before releasing the truck.
A truck you repaired comes back with the same problem. How do you handle it?
What they are checking: Whether they own comebacks, dig deeper and learn from them.
About the work
Tell me about an engine overhaul you've done. What steps were involved?
What they are checking: Whether they have real major engine experience, which this posting adds beyond routine repairs.
How do you diagnose a transmission that won't shift correctly?
What they are checking: Whether they can use diagnostics and mechanical checks to find the cause before tearing it down.
Walk me through how you'd set up for a wire feed weld on a truck frame or bracket.
What they are checking: Whether they have welding skills listed in the posting and know safety and prep steps.
How do you troubleshoot engine electronic controls when there are multiple fault codes?
What they are checking: Whether they can prioritize codes and find the root cause instead of chasing every symptom.
What's in your toolbox, and what diagnostic tools do you know?
What they are checking: Whether they own the tools the posting requires and know modern diagnostic software.
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Practice this out loudThe full job description
As published by Werner Enterprises.