CSCS Test Practice (CITB HS&E Operatives) 2026: Test de práctica 3

Test de práctica 3 de 5 de CSCS Test Practice (CITB HS&E Operatives): 25 preguntas más con respuestas y explicaciones.

Seguridad laboral
Reino Unido
120 preguntas
Revisado el 10 de octubre de 2026

Pregunta 1 de 25
Which voltage is recommended for portable electric tools on construction sites?
- 400 volts, using red cables and plugs
- 230 volts, using blue cables and plugs
- Any voltage, as long as the tool works
- 110 volts, using yellow cables and plugs
Ver respuesta
Respuesta: D. 110 volts, using yellow cables and plugs
A 110 V reduced low voltage supply, with the centre tapped to earth, lowers the risk of a serious electric shock.
Pregunta 2 de 25
You notice a damaged cable on a power tool. What should you do?
- Hide it so no one else uses it
- Use it only for short jobs
- Stop using it, take it out of use and report it
- Wrap it in insulating tape and carry on
Ver respuesta
Respuesta: C. Stop using it, take it out of use and report it
Damaged electrical equipment can cause shocks or fires. It must be repaired by a competent person.
Pregunta 3 de 25
Before digging, how should you check for buried electricity cables?
- Dig a test hole with a pick axe to feel for cables
- Check the service plans and use a cable avoidance tool (CAT)
- Ask someone walking past if they know of any cables
- Look for wires on the surface and assume none if you see none
Ver respuesta
Respuesta: B. Check the service plans and use a cable avoidance tool (CAT)
Buried cables can kill. Use service plans and a cable locator, then dig carefully by hand near any services.
Pregunta 4 de 25
Plant is working near overhead power lines. What is the main danger?
- Birds may drop from the lines onto the cab
- The lines can block the driver's view of the sky
- The lines can make the radio crackle
- The machine can touch or come too close to the lines
Ver respuesta
Respuesta: D. The machine can touch or come too close to the lines
Contact with overhead lines can kill. Keep plant out of the danger zone and follow the site's safe system of work.
Pregunta 5 de 25
Why should walkways and access routes on site be kept clear?
- So vehicles can park there
- To make the site look busy
- To prevent slips, trips and falls
- So materials can be stored there
Ver respuesta
Respuesta: C. To prevent slips, trips and falls
Good housekeeping, with tidy materials and cables, prevents many common injuries.
Pregunta 6 de 25
A grinder you are given has its guard missing. What should you do?
- Do not use it and report it
- Use it only for small cuts
- Take the guard off another grinder
- Use it carefully
Ver respuesta
Respuesta: A. Do not use it and report it
Guards protect you from the disc and flying fragments. Never use a tool with a missing or damaged guard.
Pregunta 7 de 25
Who may change the disc on an abrasive wheel such as a cut-off saw?
- The newest worker on site
- Anyone, as long as the tool is unplugged
- Only a trained, competent person
- Anyone who uses the tool
Ver respuesta
Respuesta: C. Only a trained, competent person
Fitting the wrong disc or fitting it wrongly can make it shatter. Only trained, competent people should change discs.
Pregunta 8 de 25
Your hard hat has a crack in it. What should you do?
- Get it replaced
- Keep wearing it until the end of the job
- Wear it back to front
- Tape over the crack
Ver respuesta
Respuesta: A. Get it replaced
Damaged PPE may not protect you. Report it and get a replacement.
Pregunta 9 de 25
How should pedestrians move around a site with vehicles?
- Take the shortest route across the site, whatever it is
- Use the marked pedestrian routes, kept apart from vehicles
- Walk wherever the ground is driest and least muddy
- Walk along the haul road behind the vehicles
Ver respuesta
Respuesta: B. Use the marked pedestrian routes, kept apart from vehicles
Separating people and vehicles is one of the best ways to prevent being struck by a vehicle.
Pregunta 10 de 25
A dumper is reversing near you. What should you do?
- Keep well clear and make sure the driver can see you
- Climb on the side to get a lift
- Walk behind it to guide it back
- Carry on working, because the alarm means it is safe
Ver respuesta
Respuesta: A. Keep well clear and make sure the driver can see you
Many site deaths involve reversing vehicles. Stay out of the danger zone and make eye contact with the driver.
Pregunta 11 de 25
Who may operate an item of plant, such as an excavator, on site?
- Anyone, as long as the usual operator is on a break
- Anyone who holds a full car driving licence
- Anyone who has watched someone else use it for a while
- Only people who are trained, competent and authorised to use it
Ver respuesta
Respuesta: D. Only people who are trained, competent and authorised to use it
Plant must only be used by trained and authorised operators.
Pregunta 12 de 25
Can you ride as a passenger on a dumper or other plant?
- Yes, as long as you hold on tightly
- Only if it has a proper seat for a passenger
- Yes, standing on the step if you hold on
- Yes, sitting in the bucket or skip
Ver respuesta
Respuesta: B. Only if it has a proper seat for a passenger
Riding on plant without a proper seat can lead to falls and crush injuries.
Pregunta 13 de 25
A crane is lifting a load near you. Where should you never stand?
- Under the suspended load
- In the welfare cabin
- Outside the lifting area
- Behind a barrier
Ver respuesta
Respuesta: A. Under the suspended load
Loads can fall or swing. Keep out of the area under and around a load being lifted.
Pregunta 14 de 25
What does a sign with a blue circle and a white symbol mean?
- There is a danger nearby (a warning sign)
- You must not do something (a prohibition sign)
- You must do something, such as wear PPE (a mandatory sign)
- It shows a safe route or first aid
Ver respuesta
Respuesta: C. You must do something, such as wear PPE (a mandatory sign)
Blue circular signs are mandatory signs. They tell you what you must do.
Pregunta 15 de 25
What does a sign with a red circle and a diagonal red line mean?
- It marks where drinking water can be found
- Something is not allowed (a prohibition sign)
- You must wear the PPE shown on the sign
- It shows the way to a fire exit or escape route
Ver respuesta
Respuesta: B. Something is not allowed (a prohibition sign)
Red circles with a diagonal line are prohibition signs, such as "No smoking".
Pregunta 16 de 25
What does a yellow triangle sign with a black border mean?
- Warning: there is a hazard
- It shows first aid equipment
- Something is not allowed
- You must do something
Ver respuesta
Respuesta: A. Warning: there is a hazard
Yellow triangles warn of a hazard, such as electricity or forklift trucks.
Pregunta 17 de 25
What does a green square or rectangle sign show?
- A hazard you need to watch out for
- A safe condition, such as an exit or first aid
- Where fire-fighting equipment is kept
- Something you must not do
Ver respuesta
Respuesta: B. A safe condition, such as an exit or first aid
Green signs show safe conditions and escape routes.
Pregunta 18 de 25
What does a red square or rectangle sign usually show?
- An emergency exit route out of the building
- Fire-fighting equipment, such as an extinguisher
- Where the first aid kit and first aider are
- That you must wear eye protection in the area
Ver respuesta
Respuesta: B. Fire-fighting equipment, such as an extinguisher
Red square or rectangular signs show the location of fire-fighting equipment.
Pregunta 19 de 25
Under the Work at Height Regulations 2005, what should you do first when planning work at height?
- Ask for volunteers to do the work
- Choose the cheapest ladder available
- Avoid working at height if you can
- Use a harness for every job
Ver respuesta
Respuesta: C. Avoid working at height if you can
The hierarchy is: avoid work at height, then prevent falls with suitable equipment, then minimise the distance and consequences of a fall.
Pregunta 20 de 25
Work at height cannot be avoided. What is the next step in the hierarchy?
- Work faster so less time is spent at height
- Rely on nets and nothing else
- Use equipment that prevents falls, such as a scaffold
- Use a ladder for every job
Ver respuesta
Respuesta: C. Use equipment that prevents falls, such as a scaffold
After avoiding work at height, you should prevent falls with equipment such as scaffolding or cherry pickers.
Pregunta 21 de 25
When can a ladder be a sensible choice for work at height?
- For heavy work lasting several days
- For any job, because ladders are cheap
- For low-risk, short-duration work
- Never, because ladders are banned on sites
Ver respuesta
Respuesta: C. For low-risk, short-duration work
Ladders are not banned, but they suit only low-risk, short-duration work.
Pregunta 22 de 25
What angle should a leaning ladder be set at?
- About 60°, using a 1 in 2 rule
- About 75°, using the 1 in 4 rule
- About 90°, straight up against the wall
- About 45°, using a 1 in 1 rule
Ver respuesta
Respuesta: B. About 75°, using the 1 in 4 rule
HSE's 1 in 4 rule gives an angle of about 75°.
Pregunta 23 de 25
How many points of contact should you keep when climbing a ladder?
- Two
- None, if you are carrying tools
- One
- Three, such as two feet and one hand
Ver respuesta
Respuesta: D. Three, such as two feet and one hand
HSE says keep three points of contact when climbing and, where possible, at the work position.
Pregunta 24 de 25
Which rungs of a leaning ladder should you NOT work from?
- Any rung below the middle
- Only the very top rung
- The top three rungs
- The bottom three rungs
Ver respuesta
Respuesta: C. The top three rungs
Do not work off the top three rungs. The ladder should extend at least 1 metre (three rungs) above where you are working.
Pregunta 25 de 25
How can you tell if you are overreaching on a ladder?
- You can no longer see the ground below
- Your feet start to feel sore
- Your belt buckle moves outside the stiles
- You have to stretch out one arm
Ver respuesta
Respuesta: C. Your belt buckle moves outside the stiles
Keep your belt buckle within the stiles. Move the ladder rather than leaning out.

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