FREE PRACTICE TEST 29

CSCS Mock Test 29: 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 explanationsEnvironmental Controls And Spill Response

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 50Occupational health

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

A. Mix it with waterB. Check the assessment, label/SDS and required controlsC. Smell it to identify the hazardD. Use it outdoors without further checks

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

Question 2 of 50Environmental & specialist awareness

What is the purpose of a spill kit?

A. To test concrete strengthB. To contain and absorb certain spills so they can be handled safelyC. To repair electrical toolsD. To clean PPE only

Correct answer: B. Spill kits provide materials for containment, absorption and controlled clean-up.

Question 3 of 50Occupational health

Why should contaminated work clothing not be taken into clean eating areas?

A. It is only a company image issueB. It makes the room warmerC. It can spread hazardous dusts or substancesD. It damages mobile phones

Correct answer: C. Segregating contaminated clothing helps prevent secondary exposure by ingestion or transfer.

Question 4 of 50High risk activities

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

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

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

Question 5 of 50Occupational health

Why should hearing protection fit correctly?

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

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

Question 6 of 50Environmental & specialist awareness

Why should plant engines not be left idling unnecessarily?

A. It prevents oil leaksB. It makes batteries last longerC. It wastes fuel and increases emissions and noiseD. It improves air quality

Correct answer: C. Reducing unnecessary idling lowers fuel use, emissions and noise.

Question 7 of 50Environmental & specialist awareness

What should you do first if oil or fuel is spilled on site?

A. Ignore small spillsB. Cover it with soil and leave itC. Stop the source if safe, contain the spill and follow the site's spill procedureD. Wash it into a surface-water drain

Correct answer: C. Prompt containment helps prevent pollution and allows correct clean-up and disposal.

Question 8 of 50High risk activities

What is a key hazard in a confined space?

A. Mobile phone receptionB. Too much daylightC. Excess floor spaceD. 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 9 of 50High risk activities

Why are overhead power lines dangerous to cranes and plant?

A. They only interfere with GPSB. Electricity can arc or conduct through equipment even without direct contactC. They make radios noisyD. They reduce fuel efficiency

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

Question 10 of 50Occupational health

Why must respiratory protective equipment be suitable for the hazard?

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

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

Question 11 of 50Safety

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

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

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

Question 12 of 50Working environment

What should you do if you do not understand a site instruction?

A. Guess what it meansB. Ask for clarification before continuingC. Copy what another worker is doing even if their task differsD. Ignore it if you are experienced

Correct answer: B. You should understand the instruction and the risks before starting or continuing work.

Question 13 of 50Environmental & specialist awareness

Why should spills be kept out of surface-water drains?

A. They reduce concrete strengthB. They always block toiletsC. They may flow directly to watercourses and cause pollutionD. They only affect drinking water on site

Correct answer: C. Many surface-water systems discharge to the environment, so pollutants must not enter them.

Question 14 of 50Working environment

What is a method statement mainly used for?

A. Setting out a safe sequence and method for carrying out workB. Listing employee salariesC. Ordering materials from suppliersD. Recording holiday entitlement

Correct answer: A. A method statement describes how a task will be carried out safely, often alongside a risk assessment.

Question 15 of 50Working environment

What should you do with an access route that has become obstructed by materials?

A. Use the vehicle route insteadB. Leave it until the next deliveryC. Climb over the materialsD. Arrange for the obstruction to be cleared and keep the route usable

Correct answer: D. Access and escape routes should be kept clear and usable.

Question 16 of 50High risk activities

Who should operate an excavator, telehandler or similar plant?

A. A labourer if supervised from a distanceB. Anyone with a car licenceC. Any worker over 18D. A trained, competent and authorised operator

Correct answer: D. Plant operation requires competence and site authorisation appropriate to the equipment and task.

Question 17 of 50Safety

Why should gas cylinders be stored upright and secured where required?

A. To make labels easier to read onlyB. To keep them warmerC. To increase gas pressureD. To prevent them falling and damaging the valve or becoming a projectile

Correct answer: D. A damaged cylinder valve can release energy violently, so cylinders should be secured and correctly stored.

Question 18 of 50Safety

What should you do if you find a fire door wedged open when it should be closed?

A. Lock the doorB. Paint a warning sign on itC. Remove the obstruction if safe and report the issueD. Leave it because it improves ventilation

Correct answer: C. Fire doors are part of compartmentation and should not be defeated unless designed to be held open safely.

Question 19 of 50Safety

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

A. It changes the voltage colourB. It can remove important protection against electric shockC. It only affects battery lifeD. It makes tools too quiet

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

Question 20 of 50Safety

What should you do if you smell gas or suspect a gas leak?

A. Use a flame to test for gasB. Ignore it outdoorsC. Stop work, avoid ignition sources, move to safety and follow the emergency procedureD. Switch electrical equipment on to find the source

Correct answer: C. Suspected gas leaks require prompt isolation from ignition and emergency reporting.

Question 21 of 50Working environment

What is the safest action if lighting in a work area is too poor to see hazards clearly?

A. Use a phone torch and continueB. Ask a colleague to stand nearbyC. Stop or delay the task until suitable lighting is providedD. Work more slowly without reporting it

Correct answer: C. Adequate lighting is needed to see hazards, access routes and the work itself safely.

Question 22 of 50Safety

If someone has a serious injury, what should you do?

A. Move them immediately regardless of dangerB. Raise the alarm/get first aid and emergency help in line with site proceduresC. Leave them alone to recoverD. Give them food

Correct answer: B. Serious injuries require prompt first-aid and emergency response; unnecessary movement can worsen some injuries.

Question 23 of 50Working environment

Why should you know the location of the site assembly point?

A. It is where deliveries are signed forB. You may need to report there during an emergency evacuationC. It is where tools are issuedD. It is the normal lunch area

Correct answer: B. The assembly point allows people to be accounted for after an evacuation.

Question 24 of 50Environmental & specialist awareness

If you discover an unidentified drum or container, what should you do?

A. Smell the contentsB. Pour it into another containerC. Use it as a waste binD. Do not open or move it unnecessarily; report it and follow site procedures

Correct answer: D. Unknown substances should be treated cautiously until identified and assessed.

Question 25 of 50Environmental & specialist awareness

How should hazardous waste be handled?

A. Mixed with general wasteB. Washed into drainsC. Burned on siteD. Segregated, labelled and disposed of through the correct authorised route

Correct answer: D. Hazardous waste requires controlled storage and disposal to protect people and the environment.

Question 26 of 50Working environment

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

A. Only the person who created the hazardB. Only a visiting inspectorC. Only the health and safety managerD. Anyone who notices the hazard

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

Question 27 of 50High risk activities

Why are banksmen used for some vehicle movements?

A. To speed up reversingB. To help control movements where the driver has restricted visibilityC. To inspect wagesD. To replace vehicle brakes

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

Question 28 of 50Occupational health

What is a common early symptom of hand-arm vibration syndrome?

A. Temporary hair lossB. Improved grip strengthC. Tingling or numbness in the fingersD. Better circulation

Correct answer: C. Tingling, numbness and blanching of the fingers can be signs of vibration-related damage.

Question 29 of 50High risk activities

What should you check before using a ladder?

A. That it has paint marksB. That it is the longest ladder on siteC. That someone used it yesterdayD. That it is suitable, in good condition and set up securely

Correct answer: D. Ladders should be suitable for the task, inspected and positioned on a stable surface.

Question 30 of 50Safety

What is the purpose of a first aider?

A. To diagnose every illnessB. To prescribe medicationC. To replace emergency servicesD. To give appropriate immediate assistance until further medical help is available

Correct answer: D. First aid is immediate assistance intended to preserve life and limit harm until more help is available.

Question 31 of 50Environmental & specialist awareness

What should you do before entering an area where a crane is operating?

A. Wave from behind the craneB. Walk under the hook quicklyC. Follow the exclusion-zone and communication controls and obtain permission if requiredD. Assume the operator can see you

Correct answer: C. Crane operations need controlled access because of suspended loads, slewing and blind spots.

Question 32 of 50High risk activities

Before entering a confined space, what should be in place?

A. A colleague outside with no instructionsB. A suitable risk assessment, permit/control system and emergency/rescue arrangementsC. Only a torchD. A mobile phone

Correct answer: B. Confined-space entry requires planning, atmospheric controls where needed, competent people and rescue arrangements.

Question 33 of 50Environmental & specialist awareness

What should you do if strong winds begin affecting a lifting or access operation?

A. Add more people as ballastB. Remove wind-speed checksC. Follow the equipment/plan limits and stop if conditions are unsafeD. Continue because the schedule is fixed

Correct answer: C. Wind can affect cranes, MEWPs, towers and loads; manufacturer and lift-plan limits must be respected.

Question 34 of 50High risk activities

What should happen before digging where underground services may be present?

A. Check service information, locate services with suitable equipment and use safe digging methodsB. Rely on memory of old plansC. Pour water on the areaD. Start with a mechanical excavator

Correct answer: A. Planning, service plans, locating devices and safe digging practices help prevent striking buried services.

Question 35 of 50Working environment

Why should near misses be reported?

A. So lessons can be learned and controls improved before someone is hurtB. To reduce the number of breaksC. Only to increase paperworkD. They do not need reporting if nobody was injured

Correct answer: A. Near-miss reporting helps identify weaknesses in controls and prevent recurrence.

Question 36 of 50Safety

Before using a portable electrical tool, what should you check?

A. That it is the heaviest tool availableB. That it appears in good condition and any required inspection status is currentC. That the casing has your initialsD. That the lead is as long as possible

Correct answer: B. Pre-use checks can identify obvious damage before the tool is energised.

Question 37 of 50Environmental & specialist awareness

Why should site lighting be directed carefully at night?

A. To increase fuel useB. To provide safe illumination while reducing glare and nuisance to neighbours and road usersC. To replace barriersD. To make wildlife easier to attract

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

Question 38 of 50Occupational health

Why is health surveillance used for some construction hazards?

A. To decide who can take breaksB. To detect early signs of work-related ill health where appropriateC. To measure productivity onlyD. To replace risk controls

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

Question 39 of 50Occupational health

What is the first step before manually lifting a heavy or awkward load?

A. Carry it above shoulder heightB. Lift quickly before you get tiredC. Twist your back to get momentumD. Assess the load, route and whether mechanical help or assistance is needed

Correct answer: D. Manual handling should be planned; avoid or reduce the lift where possible and assess the load and route.

Question 40 of 50High risk activities

Why must demolition work be carefully planned?

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

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

Question 41 of 50Safety

Before changing a blade or accessory on a power tool, what should you normally do?

A. Ask a colleague to hold the bladeB. Isolate the tool from its power sourceC. Remove the guard permanentlyD. Keep the trigger pressed

Correct answer: B. Isolation prevents accidental start-up while hands are near the cutting or moving parts.

Question 42 of 50Environmental & specialist awareness

What should happen if you discover contaminated soil during excavation?

A. Mix it with clean soilB. Wash it into a drainC. Spread it across the siteD. Stop or isolate as required and report it so the material can be assessed and managed

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

Question 43 of 50Occupational health

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

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

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

Question 44 of 50Working environment

Why are toolbox talks used on construction sites?

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

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

Question 45 of 50Occupational health

Which lifting technique is generally safer for a manageable load?

A. Twist while risingB. Keep the load close, use a stable stance and avoid twistingC. Lift with a rounded back and straight legsD. Keep the load at arm's length

Correct answer: B. Keeping the load close and maintaining a stable, controlled posture reduces strain.

Question 46 of 50Occupational health

Why is asbestos dangerous?

A. It causes instant electrical shockB. It only causes skin irritationC. It always catches fireD. Airborne fibres can cause serious diseases many years after exposure

Correct answer: D. Inhaled asbestos fibres can cause fatal lung diseases with long latency periods.

Question 47 of 50High risk activities

What is a major danger near reversing construction vehicles?

A. Clean windscreensB. Loud radiosC. Low tyre pressure onlyD. Driver blind spots

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

Question 48 of 50Working environment

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

A. Follow them into the zoneB. Ignore them because they accepted the riskC. Remove the signsD. Warn them if safe to do so and inform the responsible supervisor

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

Question 49 of 50Safety

What should you do with a defective ladder, tool or piece of equipment?

A. Take it out of use and report/label it according to site procedureB. Loan it to another workerC. Hide the defectD. Use it only for short tasks

Correct answer: A. Defective equipment should be prevented from being used until made safe.

Question 50 of 50Working environment

What is the main purpose of site welfare facilities?

A. To store hazardous chemicalsB. To replace first-aid arrangementsC. To provide free toolsD. To provide suitable toilets, washing, drinking water and rest facilities

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

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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.