FREE PRACTICE TEST 33

CSCS Mock Test 33: 50 Questions

Practice the format people commonly call the “CSCS test”. The official assessment is the CITB Health, Safety & Environment Operatives test: 50 questions in 45 minutes with a 45/50 pass mark.

50 questions45 minutes45/50 targetInstant explanationsDust, Noise And Occupational Health

Important: This is an independent FastQual practice test, not an official CITB test or official CITB question bank. Use it alongside current official revision materials.

45:00

Answered 0/50

Question 1 of 50Working environment

What does a red circular sign with a diagonal bar generally mean?

A. A prohibition or something you must not doB. A safe escape routeC. A mandatory actionD. First-aid equipment

Correct answer: A. Red prohibition signs communicate actions that are not allowed.

Question 2 of 50Safety

If someone is receiving an electric shock from live equipment, what should you do first if it is safe?

A. Pour water on the equipmentB. Pull them away with bare handsC. Isolate the electrical supply before touching the personD. Move the cable with a metal tool

Correct answer: C. You must avoid becoming a second casualty; safely isolate the power before contact.

Question 3 of 50High risk activities

Why are overhead power lines dangerous to cranes and plant?

A. They make radios noisyB. Electricity can arc or conduct through equipment even without direct contactC. They reduce fuel efficiencyD. They only interfere with GPS

Correct answer: B. Overhead lines can cause fatal electric shock through contact or arcing, so safe clearances and controls are essential.

Question 4 of 50Environmental & specialist awareness

What is a good way to reduce dust leaving a construction site?

A. Remove wheel-wash facilitiesB. Increase vehicle speedsC. Use source controls, damping/extraction and keep routes cleanD. Sweep dry dust into the road

Correct answer: C. Source control and good housekeeping reduce airborne dust and off-site nuisance.

Question 5 of 50Safety

Why are reduced-voltage systems such as 110 V commonly used on construction sites?

A. They remove the need for electrical inspectionsB. They make tools twice as powerfulC. They are waterproofD. They can reduce the severity of electric-shock risk compared with standard mains voltage

Correct answer: D. Reduced-voltage supplies can reduce shock risk, but equipment still needs correct use and maintenance.

Question 6 of 50Occupational health

Why must respiratory protective equipment be suitable for the hazard?

A. All masks provide identical protectionB. Different filters and respirators protect against different contaminantsC. RPE replaces all other controlsD. The colour is the only important factor

Correct answer: B. RPE must be correctly selected for the contaminant, concentration and task.

Question 7 of 50Occupational health

If a hearing-protection zone is marked, what should you do?

A. Only wear protection when machinery stopsB. Use headphones insteadC. Wear the specified hearing protectionD. Ignore the sign if you are there briefly

Correct answer: C. Mandatory hearing protection zones indicate that suitable hearing protection must be worn.

Question 8 of 50Safety

If a tool starts behaving unusually, what should you do?

A. Hit it to make it work normallyB. Remove the safety guardC. Increase the speedD. Stop using it and report/check the defect

Correct answer: D. Unusual noise, vibration or operation can indicate a dangerous defect.

Question 9 of 50Safety

Where should flammable materials be kept?

A. Next to heaters so they stay dryB. Under stairways used for evacuationC. In designated storage away from ignition sources, following site rulesD. In escape routes

Correct answer: C. Segregated, suitable storage reduces fire and ignition risk.

Question 10 of 50Safety

What is a permit-to-work system used for?

A. To issue wagesB. To control certain high-risk activities through formal authorisation and precautionsC. To replace competence requirementsD. To record lunch breaks

Correct answer: B. Permits help ensure specified precautions are in place before and during high-risk work.

Question 11 of 50Occupational health

What is the purpose of face-fit testing for tight-fitting RPE?

A. To replace trainingB. To check that the specific mask can seal adequately to the wearerC. To test the colour of the filterD. To measure hearing protection

Correct answer: B. Face-fit testing helps confirm that a tight-fitting mask is suitable for the individual wearer.

Question 12 of 50Environmental & specialist awareness

Why should noisy work be planned carefully near neighbours?

A. To eliminate the need for hearing protectionB. Noise outside the site is never relevantC. To reduce nuisance and comply with site/local controlsD. To make the equipment wear faster

Correct answer: C. Construction noise can affect neighbours and may be subject to agreed hours and control measures.

Question 13 of 50Safety

Why must safety devices on tools and machinery not be bypassed?

A. They are designed to reduce exposure to dangerous movement or conditionsB. They reduce productivity onlyC. They are optional for experienced workersD. They are only required during inspections

Correct answer: A. Defeating safety devices removes engineered protection and can expose workers to severe hazards.

Question 14 of 50High risk activities

What is a key hazard in a confined space?

A. Too much daylightB. Excess floor spaceC. Mobile phone receptionD. A dangerous atmosphere, including low oxygen or toxic gases

Correct answer: D. Confined spaces can contain life-threatening atmospheres and require strict planning and controls.

Question 15 of 50Working environment

What should you do if you are asked to carry out a task you have not been trained or authorised to do?

A. Explain that you are not competent or authorised and seek instructionB. Do it only if no supervisor is watchingC. Try it once to gain experienceD. Ask another untrained worker to help

Correct answer: A. Workers should only undertake tasks for which they are competent, trained and authorised where required.

Question 16 of 50High risk activities

Why are banksmen used for some vehicle movements?

A. To inspect wagesB. To speed up reversingC. To help control movements where the driver has restricted visibilityD. To replace vehicle brakes

Correct answer: C. A trained banksman can guide movements and help keep people out of danger zones.

Question 17 of 50Occupational health

What should you do if you develop persistent numbness in your fingers after using vibrating tools?

A. Use the tool with one handB. Ignore it until the next annual checkC. Increase your daily exposure slowlyD. Report the symptoms and seek occupational health or medical advice

Correct answer: D. Early reporting of symptoms can prevent further exposure and allow assessment.

Question 18 of 50Working environment

Why are toolbox talks used on construction sites?

A. To allocate annual leaveB. To inspect payroll recordsC. To replace all formal qualificationsD. To discuss short, relevant safety topics with the workforce

Correct answer: D. Toolbox talks provide focused, practical reminders about hazards, controls and safe working methods.

Question 19 of 50High risk activities

What should you do if a scaffold appears incomplete or has missing guardrails?

A. Do not use it and report the defectB. Use it only below the first liftC. Use it if you stay near the wallD. Add a rope as a handrail yourself

Correct answer: A. Incomplete scaffolds can expose users to falls; they should not be used until made safe.

Question 20 of 50High risk activities

What should you do if a lifting sling has visible cuts, severe wear or damage?

A. Wrap it with tapeB. Use it for a lighter load without telling anyoneC. Tie a knot in itD. Remove it from use and report it

Correct answer: D. Damaged lifting accessories must not be used unless formally assessed and made safe.

Question 21 of 50Occupational health

What should you do before using a hazardous substance you have not used before?

A. Use it outdoors without further checksB. Mix it with waterC. Check the assessment, label/SDS and required controlsD. Smell it to identify the hazard

Correct answer: C. You should understand the hazards, exposure routes and controls before use.

Question 22 of 50Environmental & specialist awareness

Why should different waste streams be separated where the site system requires it?

A. It removes the need for skipsB. It supports safe handling, recycling and lawful disposalC. It increases the amount of wasteD. It makes all waste non-hazardous

Correct answer: B. Segregation can improve recycling and prevent contamination of recyclable or hazardous waste streams.

Question 23 of 50Environmental & specialist awareness

Why must waste skips not be overfilled?

A. Materials can fall out during use or transportB. It improves recyclingC. It only affects appearanceD. It makes the skip too easy to lift

Correct answer: A. Overfilled skips create falling-object, transport and litter risks.

Question 24 of 50Safety

If you spill a flammable liquid, what is the safest response?

A. Ignore it if it evaporates quicklyB. Wash it into a drainC. Control ignition sources, follow the spill procedure and report itD. Cover it with paper

Correct answer: C. Flammable spills can ignite and spread; site spill and fire controls should be followed.

Question 25 of 50Working environment

What should you do if a floor opening is uncovered?

A. Cover it with loose cardboardB. Mark it with paint onlyC. Step around it and say nothingD. Prevent access and report it so suitable protection can be restored

Correct answer: D. Openings should be physically protected or access prevented because a fall can cause serious injury.

Question 26 of 50High risk activities

Why must demolition work be carefully planned?

A. Structures can become unstable and hazards such as services and hazardous materials must be controlledB. Planning is only required for tall buildingsC. Demolition is safe once windows are removedD. Only noise needs controlling

Correct answer: A. Demolition can create collapse, falling material, service, dust and hazardous-material risks.

Question 27 of 50Working environment

What should you do if site conditions change and the planned safe method no longer seems suitable?

A. Continue because the paperwork has already been signedB. Ignore the change if the task is almost finishedC. Ask a colleague to take responsibilityD. Stop and ask for the risk assessment or method to be reviewed

Correct answer: D. Safe systems of work should be reviewed when conditions change or new hazards appear.

Question 28 of 50Environmental & specialist awareness

Why should drains sometimes be covered or protected during spill-risk activities?

A. To prevent contaminants entering the drainage systemB. To stop rain completelyC. To increase drainage speedD. To store tools on top

Correct answer: A. Drain protection is an important part of pollution prevention.

Question 29 of 50High risk activities

What is a major danger near reversing construction vehicles?

A. Loud radiosB. Clean windscreensC. Driver blind spotsD. Low tyre pressure only

Correct answer: C. Large vehicles can have significant blind spots, so segregation, visibility and safe reversing controls are important.

Question 30 of 50Working environment

What is the main purpose of site welfare facilities?

A. To replace first-aid arrangementsB. To provide suitable toilets, washing, drinking water and rest facilitiesC. To store hazardous chemicalsD. To provide free tools

Correct answer: B. Suitable welfare arrangements support hygiene, health and safe working conditions.

Question 31 of 50Environmental & specialist awareness

What should happen if you discover contaminated soil during excavation?

A. Spread it across the siteB. Stop or isolate as required and report it so the material can be assessed and managedC. Mix it with clean soilD. Wash it into a drain

Correct answer: B. Unexpected contamination should be assessed before further disturbance or disposal.

Question 32 of 50Occupational health

Why should hearing protection fit correctly?

A. It changes the colour of the ear defendersB. It removes the need to control noise at sourceC. It makes tools run more quietlyD. Poor fit can greatly reduce the protection provided

Correct answer: D. Hearing protection only works effectively when selected, fitted and worn correctly.

Question 33 of 50High risk activities

What is a major hazard of fragile roofs?

A. They cannot get wetB. They attract lightningC. They always contain asbestosD. A person can fall through the roof surface

Correct answer: D. Fragile materials may not support a person's weight and require specific access and fall controls.

Question 34 of 50High risk activities

What should be considered before carrying out hot work such as welding or cutting?

A. Whether the task is indoorsB. Only the colour of the welding screenC. Fire risk, combustible materials, permits and fire-watch arrangements where requiredD. How quickly the job can be finished

Correct answer: C. Hot work can ignite nearby materials and often requires formal controls and fire precautions.

Question 35 of 50Working environment

Who should report a hazard that could injure someone on site?

A. Only a visiting inspectorB. Only the person who created the hazardC. Anyone who notices the hazardD. Only the health and safety manager

Correct answer: C. Everyone on site has a role in reporting hazards so they can be controlled promptly.

Question 36 of 50Environmental & specialist awareness

Why should fuel containers be stored in a suitable designated area?

A. To warm the fuelB. To reduce fire and pollution risk and allow spill containmentC. To make them easier to hideD. To keep them near drains

Correct answer: B. Suitable fuel storage helps prevent leaks, ignition and environmental contamination.

Question 37 of 50Occupational health

What should you do if you unexpectedly disturb material that you suspect may contain asbestos?

A. Sweep up the dustB. Stop work, avoid further disturbance and report itC. Keep working but wear glovesD. Put the material in a normal waste skip

Correct answer: B. Suspected asbestos should not be disturbed; stop work and follow the site's asbestos procedures.

Question 38 of 50Environmental & specialist awareness

Why are exclusion zones used around overhead lifting?

A. To prevent people entering areas where loads or objects could fall or swingB. To keep vehicles cleanC. To improve radio receptionD. To create a rest area

Correct answer: A. Exclusion protects people from dropped or moving loads.

Question 39 of 50Environmental & specialist awareness

Why may wheel-wash facilities be used at site exits?

A. To reduce mud and debris being tracked onto public roadsB. To test water pressureC. To clean workers' boots onlyD. To cool vehicle brakes

Correct answer: A. Keeping public roads clear of site mud reduces environmental nuisance and road hazards.

Question 40 of 50Occupational health

What is the best reason to report stress or mental-health concerns that are affecting safe work?

A. Only managers can raise such concernsB. It is unrelated to safetyC. It automatically leads to dismissalD. Support and adjustments may help prevent errors and protect wellbeing

Correct answer: D. Wellbeing can affect concentration and decision-making; early support can help maintain safe performance.

Question 41 of 50Occupational health

Why is health surveillance used for some construction hazards?

A. To decide who can take breaksB. To replace risk controlsC. To detect early signs of work-related ill health where appropriateD. To measure productivity only

Correct answer: C. Health surveillance can help detect early effects of exposure, but it does not replace prevention and control.

Question 42 of 50Safety

When is it appropriate to try to use a fire extinguisher?

A. Only if you are trained, it is safe and you have a clear escape routeB. If you can stand between the fire and the exitC. Only after the fire alarm stopsD. Whenever any fire is visible

Correct answer: A. Life safety comes first; extinguishers should only be used when trained and conditions are safe.

Question 43 of 50Working environment

What should you do if a safety barrier has been moved and no longer protects an opening?

A. Put a warning note nearby and carry onB. Report it and make sure the area is secured before exposure continuesC. Wait until the end of the shiftD. Assume someone else will fix it

Correct answer: B. Missing barriers can expose people to serious falls; the area should be secured and the defect reported promptly.

Question 44 of 50High risk activities

If work at height cannot be avoided, what should be prioritised?

A. Collective protection such as suitable platforms and guardrailsB. Removing edge protection for accessC. Relying only on a worker's balanceD. Working faster

Correct answer: A. Collective fall prevention protects everyone and is generally preferred before personal fall protection.

Question 45 of 50Working environment

What does a yellow triangular safety sign normally indicate?

A. A warning or hazardB. A mandatory actionC. A safe condition or first-aid pointD. A prohibition

Correct answer: A. Yellow triangular signs with dark symbols are used to warn about hazards.

Question 46 of 50Environmental & specialist awareness

Why should site lighting be directed carefully at night?

A. To provide safe illumination while reducing glare and nuisance to neighbours and road usersB. To make wildlife easier to attractC. To replace barriersD. To increase fuel use

Correct answer: A. Lighting should support safe work without creating glare, distraction or unnecessary environmental impact.

Question 47 of 50Working environment

If you see someone enter a clearly marked exclusion zone without authorisation, what is the safest response?

A. Remove the signsB. Follow them into the zoneC. Warn them if safe to do so and inform the responsible supervisorD. Ignore them because they accepted the risk

Correct answer: C. Unauthorised entry should be challenged safely and reported so the hazard remains controlled.

Question 48 of 50Occupational health

What does COSHH relate to?

A. Controlling vehicle parkingB. Controlling exposure to substances hazardous to healthC. Managing scaffold inspectionsD. Setting wage rates

Correct answer: B. COSHH requires hazardous substances and exposure routes to be assessed and controlled.

Question 49 of 50Safety

What is the purpose of lock-off or isolation procedures?

A. To make equipment run fasterB. To prevent equipment being energised unexpectedly during workC. To reserve equipment for one tradeD. To record working hours

Correct answer: B. Secure isolation helps prevent dangerous unexpected energisation or movement.

Question 50 of 50Safety

Why should you never remove an electrical plug earth pin or defeat an RCD?

A. It makes tools too quietB. It can remove important protection against electric shockC. It changes the voltage colourD. It only affects battery life

Correct answer: B. Protective electrical features are safety controls and must not be bypassed.

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Official format reference: CITB states that the Operatives HS&E test contains 50 questions, lasts 45 minutes and requires at least 45 correct answers. Check current CITB guidance.

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Updated 2026-08-19. Questions are original revision content designed around common construction health, safety and environmental principles.