Pro practiceDrill and Blast Engineer practice interview
Blast design, drilling quality, fragmentation, vibration control, misfire response and continuous improvement from field results. Practise the 6 questions interviewers ask for this role with follow-ups. Paid plans add scored feedback on every answer.
A Pro practice interview, on the Pro plan from ₦5,000 a month billed yearly, or on Premium.
- Mid level
- 20 minutes
- 6 questions
- Scored feedback on paid plans
About the role
This interview examines how you design and control blasts that are safe, compliant and useful to the mining process. The panel is looking for practical command of drilling quality, charging decisions, exclusion controls and performance analysis. You should show how field observations lead to defensible changes in later designs.
How to prepare
- Revise the relationship between geology, burden, spacing, stemming, charge distribution and timing.
- Prepare an example of diagnosing poor fragmentation, excessive movement or difficult digging.
- Review pre-blast checks, clearance communications and the safe response to suspected misfires.
- Practise explaining how wet, deviated, blocked or out-of-tolerance holes affect charging decisions.
- Think through how blast performance affects loading, hauling, crushing and overall cost.
Common mistakes
- Changing powder factor without considering geology, confinement, timing and hole quality.
- Treating a suspected misfire as a production delay instead of a controlled safety event.
- Judging a blast only by visible fragmentation and ignoring downstream performance.
- Claiming cost savings that merely move cost to loading, hauling or crushing.
What to expect
A real first-round interview
6 questions the way interviewers ask for this role, with follow-ups when an answer needs more.
Spoken, like the real thing
Speak your answers in your browser or the free desktop app, with live captions. You can ask the interviewer to repeat anything.
Scored on 5 areas
The things this interview weighs most. With a paid plan, your report shows how you did on each one.
A private report
On Plus, Pro and Premium: every answer scored, your strongest lines quoted and what to say differently next time. Interview creators never see it.
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