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QSCS Quarry Skills study materials
QSCS Quarry Skills study resources

QSCS Quarry Skills practice questions

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Question 1Health, Safety and Environmental Legislation and Site Rules

Under typical quarry site rules, who has the primary legal duty to ensure a safe system of work is in place for all site activities?

  1. The site operator or employer Correct answer.
  2. The individual contractor only
  3. The delivery driver
  4. The customer collecting stone

Explanation

Health and safety law places the primary general duty on the employer or operator to ensure safe systems of work for everyone affected by the undertaking. This duty cannot be transferred to visitors or customers.

Question 2Health, Safety and Environmental Legislation and Site Rules

What is the main purpose of a quarry's health and safety policy document?

  1. To describe the geology of the deposit
  2. To set out how the operator manages health and safety Correct answer.
  3. To list the prices of aggregate products
  4. To record the company's annual profits

Explanation

A health and safety policy states the operator's commitment and arrangements for managing risks on site. It communicates responsibilities and procedures to the workforce.

Question 3Health, Safety and Environmental Legislation and Site Rules

A visitor arrives at a quarry without having completed the site induction. What is the correct action?

  1. Allow entry if accompanied by any employee
  2. Allow entry but ask them to stay in their vehicle
  3. Allow entry only if they sign a disclaimer
  4. Refuse entry until a suitable induction is given Correct answer.

Explanation

Visitors must receive an appropriate site induction before entering operational areas so they understand the hazards and rules. A disclaimer or informal escort does not replace this requirement.

Question 4Health, Safety and Environmental Legislation and Site Rules

What does a hazard warning sign with a yellow triangle and black border generally indicate?

  1. A prohibition
  2. A general warning of danger Correct answer.
  3. A safe condition or route
  4. A mandatory action

Explanation

Triangular signs with a yellow background and black border are warning signs alerting people to a hazard. Mandatory and prohibition signs use different shapes and colours.

Question 5Health, Safety and Environmental Legislation and Site Rules

Which item of personal protective equipment is normally the minimum requirement before leaving a vehicle in an operational area of a quarry?

  1. Ear defenders
  2. High-visibility clothing
  3. Safety helmet Correct answer.
  4. Steel-toe boots

Explanation

A safety helmet is a baseline requirement in operational areas because of overhead and falling-object risks. Other PPE may also be required depending on the specific area and task.

Question 6Health, Safety and Environmental Legislation and Site Rules

Why is a 'permit to work' system used for certain high-risk tasks on a quarry site?

  1. To provide a discount on insurance premiums
  2. To formally authorise and control the task before it starts Correct answer.
  3. To replace the need for a risk assessment
  4. To record the hours worked by each employee

Explanation

A permit to work is a formal control that authorises specific high-risk work after confirming precautions are in place. It supplements, rather than replaces, risk assessment.

Question 7Health, Safety and Environmental Legislation and Site Rules

What is the correct way to dispose of waste oil generated during quarry plant maintenance?

  1. Store it in a labelled container and send it for authorised recovery or disposal Correct answer.
  2. Mix it with general site rubbish in the skip
  3. Bury it in a spoil heap away from watercourses
  4. Pour it onto the haul road to suppress dust

Explanation

Waste oil is controlled waste and must be stored securely in labelled containers and consigned to an authorised carrier for recovery or disposal. Dumping it creates pollution and breaches waste law.

Question 8Health, Safety and Environmental Legislation and Site Rules

Which of the following best describes the purpose of an environmental management system on a quarry site?

  1. To manage and reduce the site's environmental impacts in a structured way Correct answer.
  2. To set the wages of site operatives
  3. To determine the blasting pattern for the rock face
  4. To calculate the tonnage of product sold each month

Explanation

An environmental management system provides a structured framework for identifying, controlling and improving environmental performance. It covers impacts such as dust, noise, water and waste.

Question 9Health, Safety and Environmental Legislation and Site Rules

Which piece of legislation is the principal UK framework for the management of health and safety at work?

  1. The Factories Act 1961
  2. The Control of Pollution Act 1974
  3. The Environmental Protection Act 1990
  4. The Health and Safety at Work etc. Act 1974 Correct answer.

Explanation

The Health and Safety at Work etc. Act 1974 sets the general duties on employers, employees and others. Other legislation addresses specific areas such as pollution or workplace conditions.

Question 10Health, Safety and Environmental Legislation and Site Rules

A worker notices that a guard on a conveyor has been removed and not replaced. According to typical site rules, what should the worker do first?

  1. Report the defect and isolate the equipment Correct answer.
  2. Continue working but keep clear of the conveyor
  3. Ignore it because maintenance staff will notice
  4. Re-fit the guard without any training

Explanation

Unsafe conditions should be reported and, where possible, the equipment isolated so it cannot be used until the guard is restored. Employees have a duty to report hazards and not to interfere with safety devices.

Question 11Health, Safety and Environmental Legislation and Site Rules

What is the primary purpose of a site traffic management plan at a quarry?

  1. To record the fuel consumption of plant
  2. To reduce the number of employees on site
  3. To increase the speed of vehicles on site
  4. To separate pedestrians and vehicles and control vehicle movements safely Correct answer.

Explanation

A traffic management plan sets routes, segregation and controls to keep pedestrians and vehicles apart and manage interactions. It aims to reduce collision and run-over risks.

Question 12Health, Safety and Environmental Legislation and Site Rules

Under waste duty of care rules, what must accompany a load of controlled waste leaving a quarry?

  1. A waste transfer note Correct answer.
  2. A copy of the site health and safety policy
  3. A verbal description given to the driver
  4. A photograph of the load

Explanation

The duty of care requires a written description of the waste, normally a waste transfer note, to accompany controlled waste when it is transferred. This ensures the waste is handled and disposed of lawfully.

Question 13Health, Safety and Environmental Legislation and Site Rules

A blast is scheduled near a site boundary close to houses. Which control is most directly aimed at limiting the environmental impact of vibration and flyrock?

  1. Designing the blast and using suitable warnings and exclusion zones Correct answer.
  2. Increasing the charge weight per hole
  3. Blasting at the busiest time of day without notice
  4. Removing the blast warning procedures

Explanation

Careful blast design combined with warnings and exclusion zones controls vibration, flyrock and disturbance to neighbours. Increasing charge weight or removing warnings would worsen impacts.

Question 14Health, Safety and Environmental Legislation and Site Rules

What is the correct response if a worker discovers a spill of diesel flowing towards a surface water drain?

  1. Leave it to evaporate and continue working
  2. Stop the source, contain the spill and use spill kits, then report it Correct answer.
  3. Cover it with topsoil and say nothing
  4. Wash it into the drain with a hose

Explanation

The priority is to stop further release, contain the spill away from drains and watercourses, use suitable absorbents, and report it so the incident is managed and recorded.

Question 15Health, Safety and Environmental Legislation and Site Rules

What does the term 'reasonably practicable' mean when applied to controlling risk?

  1. Doing whatever is cheapest regardless of risk
  2. Balancing the risk against the time, trouble and cost of controlling it Correct answer.
  3. Applying only the controls that employees prefer
  4. Taking no action until an accident happens

Explanation

'Reasonably practicable' requires weighing the risk against the sacrifice needed to control it, so grossly disproportionate measures are not required. It is not a simple cost test and does not permit ignoring significant risk.

Question 16Health, Safety and Environmental Legislation and Site Rules

What is the usual purpose of a quarry's 'emergency procedures' document?

  1. To set the holiday entitlement of staff
  2. To describe how to respond to incidents such as fire, injury or major failure Correct answer.
  3. To list the site's product grades
  4. To record the annual training budget

Explanation

Emergency procedures set out the actions, alarms and responsibilities for responding to incidents so people can be protected and evacuated safely. They are a key part of the site's safety arrangements.

Question 17Health, Safety and Environmental Legislation and Site Rules

Why must noise exposure be monitored and controlled at a quarry?

  1. To protect workers from hearing damage and meet legal exposure limits Correct answer.
  2. To reduce the amount of product produced
  3. To increase the speed of plant operations
  4. To make the site quieter for the benefit of machinery

Explanation

Noise at work can cause permanent hearing loss, so exposure must be assessed and controlled to legal limits, with hearing protection and other measures where needed.

Question 18Health, Safety and Environmental Legislation and Site Rules

Which of the following is the best example of a control measure to reduce dust exposure for workers near a crushing plant?

  1. Working faster to finish before dust builds up
  2. Using water sprays and enclosure on the plant Correct answer.
  3. Removing the dust suppression system to save water
  4. Wearing sunglasses

Explanation

Dust should be controlled at source by suppression and enclosure, supported by other measures such as PPE where needed. Relying on speed or removing suppression increases exposure.

Question 19Health, Safety and Environmental Legislation and Site Rules

What is the primary function of a quarry's safety committee or worker consultation arrangement?

  1. To approve annual accounts
  2. To allow workers to be consulted on health and safety matters Correct answer.
  3. To set the selling price of aggregate
  4. To design the quarry layout

Explanation

Consultation arrangements give workers a voice in health and safety decisions and help identify and resolve risks. They support legal duties to consult employees on safety matters.

Question 20Health, Safety and Environmental Legislation and Site Rules

An operator plans to store a large quantity of fuel on site. Which environmental control is most important to prevent pollution of groundwater?

  1. Using a bunded tank and impermeable surface with drainage control Correct answer.
  2. Storing it in open drums on bare soil
  3. Storing it on a raised platform without bunding
  4. Placing it close to a watercourse for easy access

Explanation

Fuel should be stored in bunded tanks on an impermeable surface so that leaks are contained and cannot reach groundwater or watercourses. Bunding must have sufficient capacity for the stored volume.

Question 21Health, Safety and Environmental Legislation and Site Rules

A worker is asked to carry out a task for which they have not been trained and believe it is unsafe. Under typical site rules, what is the correct course of action?

  1. Attempt the task slowly to reduce the risk
  2. Carry out the task because a supervisor asked
  3. Refuse to carry out the task and report the concern Correct answer.
  4. Ask a colleague to do it instead without telling anyone

Explanation

Workers should not undertake tasks for which they are not competent, and they have a duty to raise concerns about unsafe work. Refusing unsafe work and reporting it protects everyone.

Question 22Health, Safety and Environmental Legislation and Site Rules

Which statement best reflects the legal position on an employer's duty to provide information, instruction and training to workers?

  1. It is required so far as is reasonably practicable to ensure safety Correct answer.
  2. It can be replaced by a signed disclaimer
  3. It is only needed for new starters
  4. It is optional if the worker is experienced

Explanation

Employers must provide the information, instruction, training and supervision needed to ensure health and safety, so far as is reasonably practicable. Experience or a disclaimer does not remove this duty.

Question 23Health, Safety and Environmental Legislation and Site Rules

A contractor proposes to bring plant onto site. Which arrangement best demonstrates effective control of contractor safety?

  1. Allowing immediate access without checks to save time
  2. Letting the contractor decide all site rules independently
  3. Checking competence, insurance and method statements before work starts Correct answer.
  4. Relying on the contractor's own assurance with no site checks

Explanation

The site should verify contractor competence, insurance and safe methods before work begins and ensure site rules are understood. This protects both the contractor and site personnel.

Question 24Health, Safety and Environmental Legislation and Site Rules

What is the main reason for segregating hazardous substances such as acids and oxidisers in a site store?

  1. To reduce the cost of storage shelving
  2. To make stocktaking easier
  3. To prevent dangerous reactions if containers leak or mix Correct answer.
  4. To allow the store to be kept unlocked

Explanation

Incompatible substances can react dangerously if they mix, so they must be segregated to prevent fires, toxic gas or explosions. Segregation is a core control under chemical safety rules.

Question 25Health, Safety and Environmental Legislation and Site Rules

A site is required to report a serious incident to the regulator. Which principle best explains why prompt reporting is required?

  1. It allows the regulator to help prevent similar incidents and ensures the site meets its legal duties Correct answer.
  2. It replaces the need for an internal investigation
  3. It allows the site to avoid telling the workforce
  4. It guarantees the site will avoid any enforcement action

Explanation

Prompt reporting under the relevant reporting regulations enables the regulator to investigate and helps prevent recurrence, and it fulfils the site's legal duty. Reporting does not guarantee immunity or replace internal investigation.

Question 26Health, Safety and Environmental Legislation and Site Rules

Under the Health and Safety at Work etc. Act 1974, what general duty does an employer owe to people who are not their employees but who may be affected by the quarry's activities?

  1. A duty to take such care as is reasonable in the circumstances so that they are not exposed to risks to their health and safety Correct answer.
  2. A duty limited to providing visitors with personal protective equipment at the gate
  3. A duty to report every visitor's presence to the regulator before they enter
  4. A duty to guarantee that no visitor can ever be injured while on site

Explanation

Section 3 of the Act requires every employer to conduct their undertaking so that persons not in their employment who may be affected are not exposed to risks to their health and safety, so far as is reasonably practicable. The standard is reasonable care, not an absolute guarantee, and it is not confined to issuing PPE.

Question 27Health, Safety and Environmental Legislation and Site Rules

A worker at a quarry suffers a specified injury and is taken to hospital. What is the employer's main legal obligation regarding the enforcing authority?

  1. Wait until the worker returns to work before deciding whether to make any report
  2. Inform the site's insurance company instead of the enforcing authority
  3. Record the event only in the site accident book and take no further action
  4. Report the incident to the relevant enforcing authority without delay, using the required reporting procedure Correct answer.

Explanation

Specified injuries and dangerous occurrences are reportable under the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations, and the report must be made to the enforcing authority promptly, normally within the timescale set by the regulations. An internal accident book entry does not replace this statutory report.

Question 28Health, Safety and Environmental Legislation and Site Rules

A quarry operator wants to reduce the risk of falls from height during maintenance on a crusher. Which approach best reflects the hierarchy of control required by work-at-height legislation?

  1. Rely on personal fall arrest equipment because it is the cheapest option
  2. Avoid the need to work at height where possible, then use collective protection such as guard rails before relying on personal fall protection Correct answer.
  3. Provide harnesses and rely on workers to clip on correctly every time
  4. Issue a briefing telling workers to be careful when working at height

Explanation

Work-at-height duties require duty holders to avoid work at height where reasonably practicable, prevent falls using collective measures such as guard rails or working platforms, and only then mitigate the distance and consequences of a fall using personal equipment. Personal fall arrest is a last resort, not a first choice.

Question 29Health, Safety and Environmental Legislation and Site Rules

A quarry's risk assessment identifies that silica dust from a screening plant could affect nearby workers. Which action best demonstrates that the assessment is being used as intended?

  1. Recording the significant findings, implementing the identified controls and communicating them to the affected workers Correct answer.
  2. Asking workers to sign the assessment to confirm they have seen it, with no controls applied
  3. Copying a generic industry template without adapting it to the plant
  4. Filing the assessment in the site office and reviewing it only after an incident

Explanation

A suitable and sufficient risk assessment must identify the significant hazards and the controls, and those controls must actually be put in place and made known to the people exposed. Recording and communicating findings is part of the duty, not an optional extra.

Question 30Health, Safety and Environmental Legislation and Site Rules

A quarry proposes to increase the depth of an excavation near a public footpath. Which combination of legal considerations is most relevant when deciding whether the change can proceed?

  1. The quarry manager's personal preference and the age of the excavator fleet
  2. Only the cost of additional fencing and the availability of plant operators
  3. Only the views of the neighbouring landowners and the local parish council
  4. The planning permission conditions, the quarry's health and safety risk assessment and its duties to protect people not in its employment Correct answer.

Explanation

Changing the scale of an excavation can affect planning conditions, the site's risk assessment and the section 3 duty to protect persons not in the employer's employment, such as footpath users. All of these must be considered together before the change is implemented.

Question 31Risk Assessment, Hazard Identification and Safe Systems of Work

Under the hierarchy of control, which measure should be considered first when eliminating a hazard at a quarry face is not practicable?

  1. Issuing personal protective equipment to the crew
  2. Providing refresher training to operators
  3. Substituting the hazard with a less dangerous method Correct answer.
  4. Adding a warning sign at the access point

Explanation

The hierarchy of control ranks elimination highest, followed by substitution, engineering controls, administrative controls and finally PPE. PPE and signage are last-resort measures, so they cannot precede substitution.

Question 32Risk Assessment, Hazard Identification and Safe Systems of Work

A risk assessment identifies a hazard as 'likely to occur with serious consequences'. What risk rating does this combination normally produce?

  1. Trivial
  2. Low
  3. High Correct answer.
  4. Negligible

Explanation

Risk is the product of likelihood and severity. A likely event with serious consequences falls in the high or very high band and requires urgent action.

Question 33Risk Assessment, Hazard Identification and Safe Systems of Work

What is the primary purpose of a permit-to-work system at a quarry plant?

  1. To control high-risk tasks through formal authorisation and isolation Correct answer.
  2. To record the hours worked by each contractor
  3. To document the maintenance budget for equipment
  4. To replace the site induction for regular staff

Explanation

A permit-to-work formalises authorisation, isolation and handover for high-risk activities such as hot work or entry into confined spaces. It does not replace induction or track time and cost.

Question 34Risk Assessment, Hazard Identification and Safe Systems of Work

Which document defines the sequence and controls for a routine task so that it can be performed consistently and safely?

  1. The safe system of work Correct answer.
  2. The site emergency plan
  3. The quarry development plan
  4. The environmental management plan

Explanation

A safe system of work sets out the step-by-step method and the controls that make a task safe. Emergency, development and environmental plans address different objectives.

Question 35Risk Assessment, Hazard Identification and Safe Systems of Work

In risk assessment terminology, what does 'likelihood' describe?

  1. The severity of the injury that could result
  2. The chance that a hazard will cause harm Correct answer.
  3. The cost of controlling the hazard
  4. The number of people exposed to a hazard

Explanation

Likelihood is the probability that the hazardous event occurs and causes harm. Severity, numbers exposed and control cost are separate considerations.

Question 36Risk Assessment, Hazard Identification and Safe Systems of Work

Who should be consulted when preparing a risk assessment for a task on a quarry site?

  1. The workers who actually carry out the task Correct answer.
  2. Only the external health and safety consultant
  3. Only the site manager who signs the document
  4. The equipment supplier alone

Explanation

Those who perform the task hold practical knowledge of how it is really done and where it can go wrong. Consultation with the workforce is a legal and practical requirement for a valid assessment.

Question 37Risk Assessment, Hazard Identification and Safe Systems of Work

What does a 'near miss' report record?

  1. An incident that caused a reportable injury
  2. A defect found during a planned inspection
  3. An event that could have caused harm but did not Correct answer.
  4. A complaint received from a neighbouring resident

Explanation

A near miss is an unplanned event that did not result in injury or damage but had the potential to do so. Reporting near misses reveals failures before harm occurs.

Question 38Risk Assessment, Hazard Identification and Safe Systems of Work

A haul truck route passes close to a pedestrian walkway. Which control best follows the hierarchy of control for this hazard?

  1. Painting a warning line along the walkway edge
  2. Briefing drivers on the pedestrian crossing points
  3. Requiring high-visibility clothing for pedestrians
  4. Physically separating the route from the walkway with a barrier Correct answer.

Explanation

Physical separation is an engineering control that removes interaction between the hazards at source. Lines, clothing and briefings are administrative or PPE measures lower in the hierarchy.

Question 39Risk Assessment, Hazard Identification and Safe Systems of Work

A risk assessment is being prepared for a task that has never been done on site before. Which approach is most appropriate?

  1. Rely on the manufacturer's generic instructions only
  2. Reuse the assessment for the closest similar task
  3. Carry out a task-specific assessment with those doing the work Correct answer.
  4. Defer the assessment until the task is under way

Explanation

A novel task has no validated controls, so a specific assessment must be developed with the people who will perform it. Copying an existing assessment risks missing new hazards.

Question 40Risk Assessment, Hazard Identification and Safe Systems of Work

Why should a risk assessment be reviewed after an incident on site?

  1. To update the site's production targets
  2. To allocate blame to the individuals involved
  3. To confirm whether the existing controls were adequate Correct answer.
  4. To satisfy the insurance company's reporting deadline

Explanation

An incident is evidence that controls may have failed or that hazards were missed, so the assessment must be checked and revised. The purpose is learning and prevention, not blame.

Question 41Risk Assessment, Hazard Identification and Safe Systems of Work

What is the main function of a site induction for new workers at a quarry?

  1. To familiarise them with site hazards, rules and emergency arrangements Correct answer.
  2. To record their attendance for payroll purposes
  3. To replace the need for task-specific training
  4. To certify their competence in a specific trade

Explanation

Induction introduces the site's specific hazards, traffic rules, alarms and muster points before work begins. It does not certify trade competence or substitute for task training.

Question 42Risk Assessment, Hazard Identification and Safe Systems of Work

A worker is asked to enter a stockpile tunnel to clear a blockage. Which control is essential before entry?

  1. A check that the worker has a mobile phone
  2. A verbal agreement with the shift supervisor
  3. A formal permit with isolation and a means of rescue Correct answer.
  4. A note in the shift diary after entry

Explanation

Confined-space entry requires formal authorisation, isolation of energy sources, atmospheric testing and rescue arrangements. Verbal agreements and informal checks do not provide these safeguards.

Question 43Risk Assessment, Hazard Identification and Safe Systems of Work

Which of the following is a behavioural control rather than an engineering control?

  1. Enforcing a speed limit on haul roads Correct answer.
  2. Building a bund around a fuel storage tank
  3. Installing a fixed guard on a conveyor drive
  4. Fitting an audible reversing alarm to a loader

Explanation

Enforcing a speed limit relies on operator behaviour and supervision, making it an administrative control. Guards, alarms and bunds are physical engineering measures.

Question 44Risk Assessment, Hazard Identification and Safe Systems of Work

What is the purpose of a dynamic risk assessment carried out at the start of a shift?

  1. To measure the productivity of the crew
  2. To check current conditions and adjust controls before work Correct answer.
  3. To record the weather for the site log
  4. To replace the written task risk assessment permanently

Explanation

A dynamic assessment checks the actual conditions at the time of work, such as weather, ground stability or other activities, and adapts controls accordingly. It supplements rather than replaces the written assessment.

Question 45Risk Assessment, Hazard Identification and Safe Systems of Work

A risk assessment records a residual risk as 'tolerable'. What does this mean for the task?

  1. The task must be prohibited until risk is eliminated
  2. The task may proceed with the controls in place Correct answer.
  3. The task should be outsourced to a contractor
  4. The task requires no further monitoring

Explanation

Residual risk is what remains after controls are applied. A tolerable residual risk means the task can proceed provided the specified controls are maintained and monitored.

Question 46Risk Assessment, Hazard Identification and Safe Systems of Work

Which factor most directly increases the severity of a fall hazard on a quarry bench?

  1. The time of day the work is done
  2. The number of workers on the bench
  3. The height of the drop below the edge Correct answer.
  4. The colour of the edge marking

Explanation

Severity of a fall is governed mainly by the fall height and the surface landed on. Markings, headcount and timing affect likelihood rather than severity.

Question 47Risk Assessment, Hazard Identification and Safe Systems of Work

A contractor arrives on site to carry out maintenance. Who is responsible for ensuring they understand the site's safe systems of work?

  1. The equipment manufacturer
  2. The contractor alone, as a self-employed professional
  3. The local authority inspector
  4. The site operator, who must coordinate with the contractor Correct answer.

Explanation

The site operator controls the workplace and must coordinate with contractors, sharing hazard information and agreeing safe systems before work starts. Contractors also have duties, but the host cannot delegate this coordination.

Question 48Risk Assessment, Hazard Identification and Safe Systems of Work

Which of the following best describes a 'hazard' as distinct from a 'risk'?

  1. The cost of implementing controls
  2. A source of potential harm Correct answer.
  3. The combination of likelihood and severity
  4. The probability that harm will occur

Explanation

A hazard is the source or situation with potential to cause harm, such as an unguarded edge. Risk is the likelihood and severity of harm arising from that hazard.

Question 49Risk Assessment, Hazard Identification and Safe Systems of Work

An assessment shows that a control relies entirely on a worker remembering a rule. Which improvement is most consistent with the hierarchy of control?

  1. Increasing the frequency of supervision
  2. Adding the rule to the induction presentation
  3. Replacing the rule with a physical interlock Correct answer.
  4. Adding a second reminder sign near the task

Explanation

Controls that depend on memory are administrative and prone to error. An engineering solution such as an interlock removes the reliance on human behaviour and ranks higher.

Question 50Risk Assessment, Hazard Identification and Safe Systems of Work

During review of a risk assessment, a control is found to have failed twice in a month without injury. What is the most appropriate response?

  1. Remove the control as it is clearly unnecessary
  2. Take no action because no one was harmed
  3. Wait for an injury before revising the assessment
  4. Record the failures and reassess the control's suitability Correct answer.

Explanation

Repeated control failures are leading indicators that the control is inadequate or impractical, even without injury. The assessment should be reviewed and the control redesigned or replaced.