QSCS Quarry Skills common mistakes
QSCS Quarry Skills · Understand the traps and how to avoid them.
When asked to isolate plant for maintenance, the candidate lists 'switch off and lock the isolator' but omits proving dead (test for zero energy), dissipating stored energy (gravity, hydraulic pressure, spring tension), and fitting a personal lock/tag with a recorded name and time.
Candidates memorise the headline step 'lock out' from toolbox talks and treat isolation as a single action rather than a sequence; stored-energy hazards (raised skips, pressurised rams, rotating drums coasting down) are invisible in a written answer, so they are forgotten.
What to do instead
Practise writing isolation as a numbered sequence every time: identify all energy sources, shut down, isolate, lock and tag with name/time, prove dead by test, dissipate or restrain stored energy, and verify. Rehearse on a specific machine (e.g. a cone crusher or conveyor drive) until the full sequence is automatic.
The candidate identifies hazards in a scenario but writes controls that are generic ('be careful', 'wear PPE', 'follow procedure') rather than tied to the specific hazard, and does not state who is exposed or how the control will be verified.
Under exam pressure candidates default to stock phrases that feel safe; they have not been trained to structure a risk assessment answer around hazard, who is harmed, existing controls, residual risk and further action.
What to do instead
Use a fixed sentence frame for every control: 'Because [hazard] can cause [harm] to [who], we will [specific control] and check it by [verification].' Ban yourself from writing 'be careful' or 'use PPE' as a standalone control; PPE is always the last line after engineering and procedural controls.
When asked about pre-start checks on mobile plant, the candidate lists only fluid levels and tyres, omitting the safety-critical items: brakes, steering, horn, reversing alarm, seat belt, mirrors and cameras, ROPS/FOPS integrity, fire extinguisher, and recording and reporting defects.
Candidates equate 'pre-start check' with a car-style fluid check and have not internalised that the check is a legal safety control on a workplace vehicle; they also forget that the outcome must be recorded and defects escalated, not just noticed.
What to do instead
Learn a category checklist (fluids, brakes, steering, visibility and alarms, protective structures, fire and emergency equipment, tyres/tracks) and always finish with 'record on the checklist and report defects to the supervisor; do not operate a machine with a safety-critical defect.'
The candidate describes traffic management on site as 'drivers should be careful and follow signs' instead of specifying segregated routes, one-way systems, speed limits, pedestrian walkways and crossing points, reversing controls, and the hierarchy of eliminating reversing where possible.
Traffic management feels like common sense to candidates who drive, so they answer from personal driving experience rather than from site-specific controls; they underestimate how many quarry fatalities involve pedestrians and reversing vehicles.
What to do instead
Answer with the hierarchy: eliminate (design out reversing and pedestrian interaction), segregate (separate routes, barriers, walkways), control (speed limits, banksmen, alarms, cameras, mirrors), and always mention communication between drivers and pedestrians and the site speed limit.
On excavation questions the candidate mentions 'shoring if needed' but does not state the need to locate buried services before digging, assess ground and adjacent loads, provide safe access and egress, keep spoil back from the edge, inspect the excavation, and prevent vehicles approaching the edge.
Candidates focus on the collapse hazard alone and forget the surrounding system: services, edge protection, access, spoil placement, water, and the effect of plant loading near the edge. They also forget that the excavation must be inspected by a competent person at defined intervals.
What to do instead
Work through a fixed excavation checklist: services located and marked, ground assessed, support or battering decided, safe access, spoil and plant kept back at least the specified distance, edge protection, gas and water considered, and recorded inspection by a competent person.
When asked about blasting, the candidate describes the firing sequence but omits exclusion zones, warning signals, guarding of access points, checking the area is clear, accounting for all explosives, misfire procedure, and post-blast inspection before re-entry.
Blasting is often learned as a specialist task the candidate has watched rather than performed, so they recall the dramatic part (the shot) and not the controlled safety system around it; misfires and exclusion zones are rarely seen in person.
What to do instead
Learn blasting as a before, during and after sequence with named signals and named responsibilities: clear the zone, post guards, sound warnings, fire, account for all charges, wait the specified time, inspect for misfires, and only then authorise re-entry. State the misfire rule explicitly.
On crushing, screening and conveyor questions the candidate lists nip points and guards but omits the wider set: pull cords and emergency stops along conveyors, guarding of drive and tail drums, isolation before clearing blockages, no climbing on or crossing under conveyors, and dust and noise controls at transfer points.
Candidates picture the visible crusher jaws and forget the conveyor network, which causes most entanglement and blockage-clearing injuries; clearing a blockage is often seen as routine and done live in practice.
What to do instead
For any processing plant question, always cover guarding, emergency stopping and pull cords, isolation before intervention (especially blockage clearing), restricted access and crossing points, and dust and noise suppression at transfer and discharge points.
The candidate describes first aid and incident response as 'call an ambulance and tell the supervisor', omitting making the scene safe, the site emergency procedure and alarm, the location and meeting point, casualty care within their competence, preserving the scene, and recording and reporting (including RIDDOR-type reporting where applicable).
Candidates conflate 'first aid' with 'call for help' and have not rehearsed the site-specific emergency sequence; they also do not know which incidents are reportable and by when.
What to do instead
Answer in a fixed order: make safe, raise the alarm and give location, give first aid within training, meet and direct the emergency services, preserve the scene, then record and report. Learn which categories of incident are reportable and the timescales for reporting.
On environmental questions the candidate writes 'control dust and noise' without naming the specific controls: water bowsers and sprays, dust suppression at transfer points and haul roads, enclosed or watered stockpiles, speed limits to cut dust, noise at source and by location and time, bunding and settlement ponds for water, and segregation and licensing of waste.
Environmental controls are treated as a soft topic and revised last, so candidates know the headings but not the measures; they also forget that water leaving site and waste leaving site are regulated and must be controlled and recorded.
What to do instead
Build a four-column revision sheet (dust, noise, water, waste) and for each list at least four concrete controls plus how each is monitored. Practise answering with named measures, not categories.
When a scenario involves a near miss or a colleague taking a shortcut, the candidate either says nothing because 'no one was hurt' or describes confronting the person aggressively, rather than reporting the near miss, using the stop-work authority, and raising it through the correct channel.
Candidates underestimate near-miss reporting and are unsure of their authority to stop work; they also confuse assertiveness with confrontation and fear being seen as a troublemaker.
What to do instead
Learn the standard response: stop the task if it is unsafe, make the area safe, report the near miss through the site system, and raise the concern factually with the person and then the supervisor. State that near misses are reported because they are free lessons, and that anyone can stop unsafe work.