High Risk Activities

What is the first duty under the Confined Spaces Regulations 1997?

• AAvoid entering the space at all if the work can reasonably be done another way✓
• BIssue a written permit to enter before anybody approaches the opening of the space
• CTest the atmosphere for oxygen, flammable gas and toxic gas in that order
• DAppoint a top man to stay at the entrance and keep sight of those inside

Answer: The Regulations are built on avoidance first. Can the job be done from outside — a camera on a pole, remote sampling, cleaning in place? Only if entry is genuinely unavoidable do you move on to a safe system of work. Permits, gas testing and a top man are all part of that system, but they come after the question nobody should skip.

What must be in place before anyone enters a confined space?

• AA signed disclaimer from every worker confirming that they understand the dangers
• BSuitable and sufficient arrangements for rescuing them if something goes wrong✓
• CA mobile phone carried by the person entering so that they can summon help quickly
• DWritten approval from the Health and Safety Executive for that entry

Answer: The Regulations are explicit: no one may enter until suitable and sufficient rescue arrangements have been prepared. That means trained rescuers, the right equipment and a workable plan — not a phone call to 999 once someone is unconscious. The fire service may take longer to arrive than the casualty has. HSE does not approve individual entries.

A worker collapses inside a confined space. Why must colleagues not go straight in?

• AEntering would break the permit and invalidate the site's insurance for the work
• BMoving a collapsed casualty before an ambulance arrives always worsens their injuries
• CWhatever overcame them is still there, and rescuers make up many confined-space deaths✓
• DThe space must be photographed for the investigation before anyone disturbs it

Answer: An unconscious casualty in a confined space usually means the atmosphere did it, and it will do the same to anyone who follows. A large share of people killed in confined spaces are would-be rescuers who went in without breathing apparatus. Raise the alarm, start the planned rescue, and do not enter without the equipment the rescue plan specifies.

Which of these makes a space a 'confined space' in law?

• AIt is dark enough to need artificial lighting for work to be carried out safely
• BIt is smaller than two metres in any direction and has no more than one way in or out of it
• CIt is below ground level and cannot be ventilated without mechanical extraction equipment
• DIt is substantially enclosed and a specified risk such as gas or drowning is foreseeable✓

Answer: Size is not the test. A confined space is one that is substantially enclosed where a specified risk is reasonably foreseeable — loss of consciousness from gas, fume, vapour or lack of oxygen, drowning, burial in a free-flowing solid, or heat. That catches large spaces like silos and tanks, and misses small ones that are well ventilated and free of those risks.

What does a confined space entry permit actually do?

• ARecords the checks made and sets out the controls under which entry is authorised✓
• BTransfers legal responsibility for the entry from the employer to the permit holder
• CProves the space has been certified safe so no further monitoring is needed inside
• DAllows entry to continue for the whole project once it has been signed by a manager

Answer: A permit is a formal handover of information and control: what was tested, what was isolated, who may enter, for how long, and what to do if things change. It documents the safe system rather than replacing it. It does not move legal duties, does not make the space permanently safe, and is issued for a defined task and period.

What is the most effective way to control the risk of vehicles striking people on site?

• ARequire everyone on the site to wear high-visibility clothing whenever they are outside
• BPhysically separate pedestrians and vehicles with barriers and separate routes✓
• CFit reversing alarms and flashing amber beacons to every vehicle operating on the site
• DBrief all workers at induction to stay alert and watch for moving plant

Answer: Segregation is the only control that does not depend on someone noticing in time. Separate gates, barriered walkways and defined crossing points keep people out of the path of plant. High-visibility clothing, alarms and briefings all sit lower down: they help a driver or a pedestrian react, but they do nothing if either is looking the wrong way.

Why does site traffic planning aim to avoid reversing wherever possible?

• AVehicles are only insured to reverse when a trained banksman is present to direct them
• BReversing uses more fuel and causes more wear on a vehicle's transmission and tyres
• CA reversing driver has the worst view of the area behind them, and it kills people✓
• DReversing alarms cause noise complaints from neighbours near the site

Answer: Being struck by a reversing vehicle is one of the biggest killers in workplace transport. The driver's view behind is the worst view they have, and the person behind often cannot hear the vehicle over site noise. That is why one-way systems and drive-through loading are preferred to banksmen and mirrors — designing the manoeuvre out beats managing it.

What is a banksman or signaller responsible for?

• ARecording the movement in the site diary so the manoeuvre can be audited later
• BPhysically guiding the vehicle by walking directly behind it to check for obstructions
• CTaking over the controls if the driver loses sight of the area they are reversing into
• DDirecting the driver using agreed signals while staying where the driver can see them✓

Answer: The banksman gives the driver eyes where the driver has none, using signals both have agreed in advance. The rule that keeps them alive is simple: if you cannot see the driver's mirrors, the driver cannot see you. Walking behind a reversing vehicle is exactly where people are crushed.

What should a plant operator do before moving a vehicle on site?

• AWalk around the vehicle to check it and confirm nobody is in the danger zone✓
• BSound the horn twice and move off slowly, as the alarm warns anyone nearby
• CCheck the mirrors only, since a walkaround is required at the start of the shift
• DAsk the nearest worker to watch the vehicle out and signal if anything happens

Answer: A walkaround does two jobs at once: it catches defects such as tyre damage and leaks, and it puts the operator's eyes into the blind spots where a person, a tool or a level could be sitting. Alarms and mirrors are aids and both have gaps — a horn does not help someone who cannot hear it over a breaker.

Why must a load be secured before a vehicle moves, even within the site?

• AAn unsecured load is only an offence once the vehicle leaves the site onto the highway
• BA shifting load can make the vehicle unstable or fall onto people alongside it✓
• CSecuring the load is needed to protect it from weather damage during transit
• DLoad restraints are required so that the vehicle's weight is distributed evenly

Answer: A load that moves changes the vehicle's centre of gravity, which is how machines overturn on slopes and at speed. It can also simply fall off onto whoever is walking past. The duty applies on site, not just on the road — the physics does not know where the gate is.

What is the safest layout for site traffic routes?

• AA route decided by each driver on the day depending on where materials are needed
• BA two-way road down the middle of the site with passing places every fifty metres
• CA one-way circuit wide enough for the largest vehicle, with turning areas designed in✓
• DThe shortest possible route between the gate and the work face to reduce journeys

Answer: A one-way circuit removes both reversing and head-on conflict, and sizing it for the largest vehicle stops drivers improvising around obstructions. Turning and unloading areas are designed in rather than improvised. Routes that change daily are the ones where a pedestrian walks into a place that was safe yesterday.

How often must an excavation be inspected?

• AAt the start of every shift, and again after any event affecting its stability✓
• BOnce every seven days, and again whenever the weather has been particularly wet
• CBefore the first entry only, provided the support system is not altered afterwards
• DMonthly, unless the excavation is deeper than two metres, when it becomes weekly

Answer: A competent person must inspect at the start of every shift in which work is done, after any event likely to have affected strength or stability, and after any unintentional fall of material. Ground conditions change with rain, vibration and time, so yesterday's inspection tells you nothing about this morning.

How often must a written report of an excavation inspection be produced?

• AOne report for every inspection that is carried out, so one at the start of every shift
• BOne report in any seven-day period, plus a report after an event-triggered inspection✓
• COne report when the excavation is first dug out and another when it is finally filled in
• DNo written report is required provided the competent person records it verbally

Answer: This is the part people get the wrong way round. The INSPECTION is every shift; the REPORT is one in any seven-day period. But if something happens that affects the excavation and an extra inspection is carried out, that one does need its own report. Inspecting every shift and filing weekly is compliant; inspecting weekly is not.

What are the three recognised ways of preventing an excavation collapsing?

• ACovering the sides with plastic sheeting, adding sandbags, and fencing the top
• BKeeping the excavation under 1.2 metres, pumping it dry, and working quickly
• CBattering the sides back, benching them in steps, or supporting them with shoring✓
• DRemoving spoil to a distance, using a smaller machine, and working only in dry weather

Answer: Battering cuts the sides back to a safe angle, benching does the same in steps, and support systems — trench boxes, sheets and props — hold the faces in place. Which one you use depends on the ground, the depth and the space available. Depth alone has not been the test for years: a person can be killed by a fall of material from a trench well under head height.