PASMA Tower Scaffold Operator Assessment — Questions and Answers

Question 1: What precautions are needed when using a tower scaffold in a confined space environment?

Ensure adequate ventilation, monitor for toxic or oxygen-depleted atmospheres, and establish rescue procedures specific to the confined space (Correct answer)
Only a torch is needed
Confined spaces are warmer and therefore safer
No special precautions

Correct answer: Ensure adequate ventilation, monitor for toxic or oxygen-depleted atmospheres, and establish rescue procedures specific to the confined space

Confined spaces (e.g., tanks, basements, enclosed plant rooms) may have insufficient ventilation, toxic atmospheres, or oxygen depletion. The Confined Spaces Regulations 1997 require specific risk assessment, atmospheric monitoring, and rescue arrangements.

Question 2: What seasonal consideration affects tower scaffold inspection during autumn?

Autumn has no special considerations
Wet fallen leaves on platforms create extreme slip hazards, earlier darkness reduces working hours, and autumn storms can arrive rapidly (Correct answer)
Only the changing colours affect visibility
Autumn is the safest season for tower work

Correct answer: Wet fallen leaves on platforms create extreme slip hazards, earlier darkness reduces working hours, and autumn storms can arrive rapidly

Wet leaves on aluminium platforms are extremely slippery. Shorter daylight hours reduce the available working window. Autumn weather can change rapidly with unexpected storms. Increased rainfall makes ground conditions softer. Regular clearing of leaves from platforms is essential.

Question 3: What environmental factor must be checked before erecting a tower scaffold on grass?

Whether the ground beneath the grass is firm enough to support the tower load without sinking (Correct answer)
The type of grass
The length of the grass
Whether the grass has been recently mowed

Correct answer: Whether the ground beneath the grass is firm enough to support the tower load without sinking

Grass conceals the true ground condition. The soil beneath may be soft, waterlogged, or over a void. The ground must be probed and assessed for firmness. Sole boards under base plates may be needed to distribute the load.

Question 4: What should an operative do if unauthorised modifications have been made to a tower scaffold?

Accept them if the tower looks stable
Do not use the tower, report the modifications, and have a competent person assess and rectify the situation (Correct answer)
Add more modifications to compensate
Use the tower but work more carefully

Correct answer: Do not use the tower, report the modifications, and have a competent person assess and rectify the situation

Unauthorised modifications (removed braces, added platforms, unofficial ties) may compromise the tower's structural integrity. The tower must not be used until a competent person has assessed the modifications and either approved or reversed them.

Question 5: When assembling a tower, at what height must a platform with edge protection first be provided?

Only above 10 metres
Only above 5 metres
At any height where there is a risk of a fall (Correct answer)
Only at the very top of the tower

Correct answer: At any height where there is a risk of a fall

Under the Work at Height Regulations 2005, there is no minimum height threshold — platforms and edge protection must be provided at any height where a person could fall and injure themselves. Even falls from low heights can cause serious injury.

Question 6: Under WAHR 2005, can a ladder be used as a working platform for tasks from a tower scaffold?

Yes, ladders can always be used on tower platforms
Yes, but only wooden ladders
No, a ladder must not be used on a tower scaffold platform as it creates additional height and instability (Correct answer)
Yes, but only if the ladder is tied to the guard rail

Correct answer: No, a ladder must not be used on a tower scaffold platform as it creates additional height and instability

Placing a ladder on a tower platform creates an additional working at height risk above the guard rails, introduces instability, and increases the risk of the tower overturning due to the elevated centre of gravity. It is prohibited by PASMA guidance.

Question 7: What type of activities should NOT be performed from a tower scaffold platform?

Inspection tasks
Hot work (welding, cutting) without a specific risk assessment and fire precautions, or pulling heavy loads that could overturn the tower (Correct answer)
Painting and decorating
Light electrical work

Correct answer: Hot work (welding, cutting) without a specific risk assessment and fire precautions, or pulling heavy loads that could overturn the tower

Hot work creates fire risks (aluminium towers conduct heat, platforms can ignite). Pulling heavy loads or applying significant horizontal forces can overturn the tower. These activities require specific risk assessments, additional precautions, or alternative access equipment.

Question 8: A near-miss incident involving a mobile access tower should be treated in which of the following ways?

Reported only if there is a likelihood of the near-miss recurring
Kept confidential between those directly involved
Reported in accordance with company procedures regardless of whether anyone was hurt (Correct answer)
Recorded and reported only if someone was actually injured

Correct answer: Reported in accordance with company procedures regardless of whether anyone was hurt

All near-miss incidents must be reported following company procedures so that lessons can be learned and corrective action taken to prevent future accidents.

Question 9: Who has duties under the Work at Height Regulations 2005?

Only self-employed persons
Employers, the self-employed, and anyone who controls the work of others (Correct answer)
Only construction workers
Only HSE inspectors

Correct answer: Employers, the self-employed, and anyone who controls the work of others

The regulations apply to employers, self-employed persons, and anyone who controls the work of others (such as facilities managers or principal contractors). Employees also have duties to use equipment properly and report hazards.

Question 10: After assembly is complete, what final check must be carried out before the tower is used?

A full structural engineering survey
A pre-use inspection covering stability, levelness, brakes, guard rails, toeboards, and platform integrity (Correct answer)
A test by placing the maximum load on the platform
No checks are needed if a trained person assembled it

Correct answer: A pre-use inspection covering stability, levelness, brakes, guard rails, toeboards, and platform integrity

A thorough pre-use inspection must confirm the tower is level, plumb, all braces are fitted, guard rails and toeboards are secure, castors are locked, and the overall assembly matches the manufacturer's configuration. This is recorded on an inspection checklist.

Question 11: Which UK regulation specifically governs working at height?

The Lifting Operations and Lifting Equipment Regulations 1998
The Construction (Design and Management) Regulations 2015
The Health and Safety at Work etc. Act 1974
The Work at Height Regulations 2005 (Correct answer)

Correct answer: The Work at Height Regulations 2005

The Work at Height Regulations 2005 (WAHR 2005) are the principal regulations governing all work at height in the UK. They apply to all work at height where there is a risk of a fall liable to cause personal injury.

Question 12: What is the danger of using a tower scaffold on a slope without proper precautions?

Slopes improve drainage and therefore safety
There is no danger — castors handle slopes
The tower's centre of gravity shifts towards the downhill side, dramatically increasing the risk of overturning (Correct answer)
The tower is more stable on slopes due to wedging effect

Correct answer: The tower's centre of gravity shifts towards the downhill side, dramatically increasing the risk of overturning

On a slope, the tower's centre of gravity shifts towards the lower side, reducing the restoring moment on that side. The adjustable legs must be used to level the tower, and brakes must be reliable. If the slope is too steep, the tower should not be used.

Question 13: What is the correct way to lift tools and materials to a tower scaffold platform?

Climb the ladder while carrying everything by hand
Use an internal lifting method such as hand-to-hand passing, or a gin wheel/rope for heavier items (Correct answer)
Use a crane for all items regardless of weight
Throw items up from the ground

Correct answer: Use an internal lifting method such as hand-to-hand passing, or a gin wheel/rope for heavier items

Light items can be passed hand-to-hand through the internal ladder access. Heavier items should be lifted using a gin wheel (small pulley and rope system). Workers should never climb while carrying items as they need both hands free for safe climbing.

Question 14: What is the risk of noise exposure when working on a tower scaffold?

Noise is only a risk indoors
Loud noise from nearby machinery or operations can prevent operatives from hearing warnings, communicating, and can cause distraction leading to falls (Correct answer)
Noise is not a risk at height
Noise improves concentration

Correct answer: Loud noise from nearby machinery or operations can prevent operatives from hearing warnings, communicating, and can cause distraction leading to falls

Excessive noise impairs communication between the platform and ground level, prevents operatives from hearing warning signals or approaching vehicles, and can be distracting. Under the Control of Noise at Work Regulations 2005, noise exposure must be assessed and controlled.

Question 15: What is the maximum height-to-base ratio for a mobile tower scaffold used indoors?

2:1
3.5:1 (Correct answer)
5:1
3:1

Correct answer: 3.5:1

For indoor use, the maximum height-to-base ratio is 3.5:1. The higher ratio is permitted because indoor towers are sheltered from wind. However, doors, openings, and internal air movement should still be considered.

Question 16: What is the environmental risk of using tower scaffolds in areas with overhead cranes?

The crane boom, load, or rigging could strike the tower or its occupants, and crane-induced air movement can destabilise the tower (Correct answer)
Only the hook is a risk
Cranes provide useful anchor points for tying towers
Overhead cranes are always operated clear of scaffolds

Correct answer: The crane boom, load, or rigging could strike the tower or its occupants, and crane-induced air movement can destabilise the tower

Overhead crane operations near towers create collision risks (the load, boom, or rigging could strike the tower), and the movement of large loads through the air creates localised wind disturbance. Exclusion zones for crane operations must account for tower positions.

Question 17: What role does photographic evidence play in tower scaffold inspections?

Photographs replace the need for written reports
Photographs are only taken for marketing purposes
Photographs are prohibited during inspections
Photographs can supplement written reports by providing visual evidence of defects, conditions, and the overall state of the tower (Correct answer)

Correct answer: Photographs can supplement written reports by providing visual evidence of defects, conditions, and the overall state of the tower

While not a legal requirement, photographs are valuable supplementary evidence. They provide visual records of defects, general condition, and site context. However, they supplement rather than replace the formal written inspection report.

Question 18: Which regulation requires that a rescue plan is in place before work at height commences?

The Electricity at Work Regulations 1989
The Work at Height Regulations 2005 (Correct answer)
The Manual Handling Operations Regulations 1992
The Noise at Work Regulations 2005

Correct answer: The Work at Height Regulations 2005

Regulation 4 of WAHR 2005 requires planning for emergencies and rescue. A rescue plan must be in place before work at height begins, so that in the event of a fall or equipment failure, rescue can be carried out promptly.

Question 19: When building a tower adjacent to a building, what must be considered regarding the height-to-base ratio?

The ratio must still be maintained unless the tower is tied to the structure (Correct answer)
The ratio can be ignored because the building provides support
Adjacent buildings always reduce the required ratio by half
The building automatically acts as an outrigger

Correct answer: The ratio must still be maintained unless the tower is tied to the structure

The height-to-base ratio must always be maintained unless the tower is properly tied into the adjacent structure using appropriate fixings. Simply being near a building does not provide stability.

Question 20: Under WAHR 2005, what must an employer ensure about the place where work at height is performed?

That it is above 4 metres from ground level
That it is painted a bright colour
That it has CCTV coverage
That it is safe, stable, of sufficient dimensions, and with suitable conditions (Correct answer)

Correct answer: That it is safe, stable, of sufficient dimensions, and with suitable conditions

Every place of work at height must be stable, have sufficient strength for the purpose, have a suitable surface, be of sufficient dimensions to allow safe passage and working, and have suitable environmental conditions.

Question 21: What is the recommended maximum height for a standard mobile tower scaffold used by a PASMA trained operative?

There is no maximum; it depends on the manufacturer's instruction manual (Correct answer)
50 metres
4 metres
8 metres in all cases

Correct answer: There is no maximum; it depends on the manufacturer's instruction manual

There is no single universal maximum height — the permissible height depends on the specific manufacturer's design, the instruction manual, and the base-to-height ratio. Operatives must always follow the manufacturer's guidelines for the specific tower system being used.

Question 22: What should be checked about the castors before moving a tower to a new position?

That only the front castors are unlocked
That the brakes are released, the tower height is within the moving limit, and no persons or materials are on the tower (Correct answer)
That they are the correct colour for the site
That the castors have been removed and replaced with skids

Correct answer: That the brakes are released, the tower height is within the moving limit, and no persons or materials are on the tower

Before moving a tower, brakes must be released, the tower must be at or below the manufacturer's maximum moving height, all persons must dismount, and loose materials must be removed. The tower should be pushed at the base, not pulled from the top.

Question 23: Why should sheeting or tarpaulins NOT be attached to a tower scaffold without authorisation?

Because they add too much weight
Because they make the tower look untidy
Because they dramatically increase the wind-catching surface area, increasing the overturning moment and risk of collapse (Correct answer)
Because they obscure the guard rails

Correct answer: Because they dramatically increase the wind-catching surface area, increasing the overturning moment and risk of collapse

Sheeting, tarpaulins, banners, or any large-area material significantly increases the surface area exposed to wind, creating much greater wind forces. This dramatically increases the overturning moment and can cause the tower to collapse in even moderate winds.

Question 24: What are sole boards and when should they be used?

Sole boards replace the need for castors
Timber boards placed under base plates on soft ground to further distribute the load and prevent sinking (Correct answer)
Sole boards are the lowest rung of the ladder
Sole boards are the platforms at the top of the tower

Correct answer: Timber boards placed under base plates on soft ground to further distribute the load and prevent sinking

Sole boards are timber planks (typically scaffold boards) placed under the base plates when the ground is soft, such as on grass, recently filled ground, or muddy surfaces. They further spread the load to prevent the tower from sinking unevenly.

Question 25: What should an operative do if they discover the tower scaffold has been left with castor brakes unlocked?

Lock the brakes immediately, inspect the tower for any movement or displacement, and report the breach of procedure (Correct answer)
Unlock the remaining brakes so all are consistent
Ignore it if the tower has not moved
Climb the tower anyway

Correct answer: Lock the brakes immediately, inspect the tower for any movement or displacement, and report the breach of procedure

Unlocked brakes mean the tower may have moved since the last inspection, potentially onto uneven ground or into contact with hazards. Lock the brakes immediately, check the tower has not been displaced, and report the safety breach for investigation.

Question 26: When should a rescue plan for mobile access tower work be reviewed and updated?

At the start of each calendar year regardless of any changes
Whenever there is a significant change to the work or work environment (Correct answer)
Only after an incident has occurred on site
Every five years as part of a formal health and safety audit

Correct answer: Whenever there is a significant change to the work or work environment

A rescue plan must be reviewed and updated whenever significant changes occur to the work, work environment, or personnel to ensure it remains relevant and effective.

Question 27: During an inspection, how should the safe working load (SWL) of the tower be verified?

By loading the platform to maximum capacity and observing
By checking the manufacturer's plate and instruction manual and ensuring the current loading does not exceed the stated SWL (Correct answer)
SWL does not need to be verified
By weighing each component individually

Correct answer: By checking the manufacturer's plate and instruction manual and ensuring the current loading does not exceed the stated SWL

The safe working load must be checked against the manufacturer's specification on the identification plate and in the instruction manual. The total load on the platform (persons, tools, materials) must not exceed this limit.

Question 28: What additional requirement does WAHR 2005 impose when work at height involves a risk of falling into water?

No additional requirements apply
Only reflective clothing is required
Workers must be able to swim
Additional measures must be taken including the provision of life jackets, rescue boats, and trained rescue personnel (Correct answer)

Correct answer: Additional measures must be taken including the provision of life jackets, rescue boats, and trained rescue personnel

When there is a risk of falling into water, additional precautions must include personal flotation devices, rescue boats or equipment, trained rescue personnel, and measures to prevent drowning. Hypothermia risk must also be assessed.

Question 29: What is the effect of vibration from nearby machinery on a tower scaffold?

Vibration can loosen components, affect the ground beneath the tower, cause fatigue in operatives, and trigger resonance in the tower structure (Correct answer)
Vibration strengthens scaffold connections
Vibration only affects wooden scaffolds
Vibration has no effect on tower scaffolds

Correct answer: Vibration can loosen components, affect the ground beneath the tower, cause fatigue in operatives, and trigger resonance in the tower structure

Ground-borne vibration (from piling, heavy machinery, road traffic) can progressively loosen tower components, weaken the ground bearing capacity, and cause the tower to 'walk' on its castors. Prolonged vibration exposure also causes operator fatigue.

Question 30: What is the legal definition of 'work at height' under WAHR 2005?

Only work on scaffolding or ladders
Work in any place where a person could fall a distance liable to cause personal injury (Correct answer)
Any work carried out above 3 metres from the ground
Any work carried out above 2 metres from the ground

Correct answer: Work in any place where a person could fall a distance liable to cause personal injury

WAHR 2005 defines work at height as work in any place (including at or below ground level) where a person could fall a distance liable to cause personal injury. There is no minimum height threshold.

Question 31: What is a 'fragile surface' under WAHR 2005?

A surface that would be liable to fail if any reasonably foreseeable loading were applied to it (Correct answer)
Any surface that has been recently painted
A surface made of metal
Any surface above 10 metres

Correct answer: A surface that would be liable to fail if any reasonably foreseeable loading were applied to it

A fragile surface is one that is liable to fail if subjected to a reasonably foreseeable load, such as the weight of a person and any materials they carry. Examples include fibre cement roof sheets, glass roof panels, and corroded metal decking.

Question 32: At what Beaufort scale wind force should work on a tower scaffold cease?

Force 2 (light breeze)
Force 7 (near gale)
Force 4 (moderate breeze, 13-17 mph) (Correct answer)
Force 10 (storm)

Correct answer: Force 4 (moderate breeze, 13-17 mph)

PASMA recommends ceasing work on tower scaffolds at Beaufort Force 4 (moderate breeze, 13-17 mph), when small branches begin to move and dust and paper are raised. Tower scaffolds are lightweight and have large surface areas making them particularly wind-sensitive.

Question 33: What should be inspected regarding the platforms and decking of a tower scaffold?

That they can be easily removed by one person
That they are fully boarded, free from defects, wind locks engaged, and trapdoors functional (Correct answer)
That they are painted with non-slip paint
That they are lightweight enough to carry by hand

Correct answer: That they are fully boarded, free from defects, wind locks engaged, and trapdoors functional

Platforms must be fully boarded with no gaps, wind locks or clips engaged to prevent uplift, trapdoors functioning correctly, and boards free from splits, cracks, warping, or excessive wear that could compromise their strength.

Question 34: Why should operatives not climb the outside of a tower scaffold?

It damages the paint on the tower
External climbing applies horizontal forces that can overturn the tower, and a fall would be unprotected with nothing to arrest it (Correct answer)
External climbing is only prohibited above 5 metres
It is allowed but slower

Correct answer: External climbing applies horizontal forces that can overturn the tower, and a fall would be unprotected with nothing to arrest it

Climbing externally applies horizontal pull forces to the tower (the climber's weight pulling outwards), which can cause overturning. Additionally, if the climber falls, they fall to the ground with no intermediate platforms or guard rails to arrest the fall.

Question 35: What is the maximum wind force at which a tower scaffold should be moved?

Any wind speed is acceptable for moving towers
Force 8 (gale force) is the limit
Wind does not affect moving a tower because it is on wheels
Towers should not be moved in wind conditions above Beaufort Force 4 (17 mph) (Correct answer)

Correct answer: Towers should not be moved in wind conditions above Beaufort Force 4 (17 mph)

PASMA recommends that towers should not be moved in winds exceeding Beaufort Force 4 (17 mph). During movement, the tower is particularly vulnerable because brakes are released and the tower is in motion, making it harder to control.

Question 36: How should the environmental impact of tower scaffold use on ecologically sensitive sites be managed?

Ground protection measures should be used to prevent damage to habitats, and work should avoid nesting seasons or protected species areas (Correct answer)
Only concrete surfaces should be used
The tower should be painted green for camouflage
Environmental impact is not a concern for scaffolding

Correct answer: Ground protection measures should be used to prevent damage to habitats, and work should avoid nesting seasons or protected species areas

On ecologically sensitive sites, ground protection (boards, mats) prevents damage to vegetation and habitats. Work near nesting birds (protected under the Wildlife and Countryside Act 1981) may be restricted during breeding season (March-August). An ecological survey may be required.

Question 37: How should the scene of a mobile access tower accident be managed while awaiting the arrival of emergency services?

The area should be cordoned off to prevent unauthorised access while bystanders are kept calm (Correct answer)
Colleagues should attempt to dismantle the tower to help reach the casualty
The area should be cleared of all personnel and photographic evidence preserved
Work on adjacent areas should continue as normal to minimise site disruption

Correct answer: The area should be cordoned off to prevent unauthorised access while bystanders are kept calm

Cordoning off the accident scene prevents unauthorised access, protects the casualty from further harm, and prevents secondary accidents while emergency services are responding.

Question 38: What should be checked about the internal ladder access during an inspection?

That the ladder is detachable for use elsewhere
That the ladder rungs are wide enough for two people side by side
That the ladder is externally mounted
That ladder frames are correctly positioned, rungs are undamaged, and climb path is unobstructed (Correct answer)

Correct answer: That ladder frames are correctly positioned, rungs are undamaged, and climb path is unobstructed

Internal ladder frames must be in the correct position as per the manufacturer's instructions, with all rungs intact and undamaged. The climb path through trapdoors must be clear of obstructions, and platforms must be in place at each level.

Question 39: What must be done with a tower scaffold inspection report if the tower is moved to a different location on site?

A new inspection must be carried out and a new report produced at the new location (Correct answer)
The report must be emailed to the HSE
The old report can be reused without changes
No action is needed as long as it was inspected within the last 7 days

Correct answer: A new inspection must be carried out and a new report produced at the new location

Moving a tower constitutes an event that could affect its stability — different ground conditions, proximity to hazards, exposure to wind. A new pre-use inspection and report are required after the tower is re-erected or repositioned.

Question 40: What does WAHR 2005 Regulation 14 require regarding the provision of information and training?

Only new employees need training
Training is required only for work above 10 metres
Every person involved in work at height must receive adequate training and instruction appropriate to their role (Correct answer)
Training is optional for experienced workers

Correct answer: Every person involved in work at height must receive adequate training and instruction appropriate to their role

Regulation 14 requires employers to ensure that every person who works at height, supervises it, or manages it receives adequate training, information, and instruction appropriate to the work being undertaken.

PASMA Tower Scaffold Operator Assessment

The PASMA (Prefabricated Access Suppliers' and Manufacturers' Association) Tower Scaffold Operator card scheme assessment tests knowledge of safe tower scaffold assembly, inspection, working at height regulations, stability, outriggers, and environmental considerations.

Questions

45 min

Time Limit

75%

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