PASMA Tower Scaffold Operator Assessment — Questions and Answers

Question 1: Which body is responsible for enforcing the Work at Height Regulations 2005 on construction sites?

The local council
The police
The Health and Safety Executive (HSE) (Correct answer)
The Environment Agency

Correct answer: The Health and Safety Executive (HSE)

The Health and Safety Executive (HSE) is the primary enforcement body for health and safety legislation on construction sites. HSE inspectors can issue improvement notices, prohibition notices, and prosecute for breaches.

Question 2: Which schedule of WAHR 2005 specifically covers requirements for mobile tower scaffolds?

Schedule 1
Schedule 6 (Correct answer)
Schedule 3
Schedule 9

Correct answer: Schedule 6

Schedule 6 of the Work at Height Regulations 2005 sets out specific requirements for scaffolding, including mobile tower scaffolds. It covers assembly, use, inspection, and competence requirements.

Question 3: Why is it important that all four castors of a tower scaffold are on the same level plane?

Level castors are only needed for indoor towers
If they are not level, the tower leans, shifting the centre of gravity and reducing the effective base size on one side (Correct answer)
For aesthetic purposes
It does not matter as long as three are touching the ground

Correct answer: If they are not level, the tower leans, shifting the centre of gravity and reducing the effective base size on one side

If all four castors are not on the same level, the tower leans, reducing the restoring moment on the lower side. In extreme cases, one castor may lift off the ground, effectively reducing the base to a triangle and dramatically reducing stability.

Question 4: What should be done with all tower components before assembly begins?

They should be left in direct sunlight for sterilisation
They should be painted to prevent rust
They should be visually inspected for damage, corrosion, and defects (Correct answer)
They should be weighed individually

Correct answer: They should be visually inspected for damage, corrosion, and defects

All components must be visually inspected before use. Damaged, bent, corroded, or defective parts must not be used as they compromise the structural integrity of the tower. This is a requirement under PUWER 1998.

Question 5: What action should be taken if the platform boards become wet or icy?

Continue working but walk carefully
Work is only suspended in snow
Clear the surface, apply grit or non-slip material, or suspend work until conditions improve (Correct answer)
Cover the boards with newspaper

Correct answer: Clear the surface, apply grit or non-slip material, or suspend work until conditions improve

Wet or icy platforms create a serious slip hazard. The surface should be cleared and dried where possible, grit or non-slip material applied, or work suspended until conditions improve. This is particularly important on exposed outdoor towers.

Question 6: What is the correct internal access method for climbing a tower scaffold?

Using the built-in internal ladder frames via the trapdoor hatch (Correct answer)
Climbing the diagonal braces on the outside
An external ladder leaning against the tower
Scaling the outside frames hand over hand

Correct answer: Using the built-in internal ladder frames via the trapdoor hatch

Internal ladder frames with trapdoor platforms provide the safest means of access. External climbing or external ladders can destabilise the tower and expose the operative to a greater fall risk.

Question 7: What effect does working at the edge of a platform have on tower stability?

No effect
It only affects stability above 10 metres
It improves stability by distributing weight evenly
It moves the centre of gravity towards the edge, increasing the risk of overturning (Correct answer)

Correct answer: It moves the centre of gravity towards the edge, increasing the risk of overturning

When an operative works at the platform edge (e.g., leaning out to reach something), their weight shifts the combined centre of gravity towards that edge. This reduces the restoring moment on that side and increases the overturning moment.

Question 8: What is the 'overturning moment' of a tower scaffold?

The weight of the tower
The time it takes to dismantle the tower
The time between inspections
The tendency of the tower to tip over, calculated as the horizontal force multiplied by the height at which it acts (Correct answer)

Correct answer: The tendency of the tower to tip over, calculated as the horizontal force multiplied by the height at which it acts

The overturning moment is the product of a horizontal force (e.g., wind) and the distance from the point of application to the tipping point (base edge). The taller the tower and greater the force, the larger the overturning moment and the greater the risk of toppling.

Question 9: What precaution should be taken when using a tower scaffold on a flat roof?

Flat roofs are always safe for towers
Flat roofs eliminate all fall risks
The roof's structural capacity must be checked, edge protection must be in place, and the tower's proximity to roof edges must be controlled (Correct answer)
Only check for leaks

Correct answer: The roof's structural capacity must be checked, edge protection must be in place, and the tower's proximity to roof edges must be controlled

Flat roofs may not be designed to support the concentrated loads of a tower scaffold. The roof edge presents a fall risk if the tower is positioned near it. The roof surface may be fragile (skylights) or slippery. A structural assessment and edge protection are essential.

Question 10: How does humidity affect the safe use of a tower scaffold?

Humidity has no effect
High humidity causes condensation on metal surfaces making them slippery, can reduce grip on tools, and increases fatigue and heat stress for operatives (Correct answer)
Humidity only affects the paint finish
Humidity protects against rust

Correct answer: High humidity causes condensation on metal surfaces making them slippery, can reduce grip on tools, and increases fatigue and heat stress for operatives

High humidity creates condensation on cool metal surfaces (especially early morning), making platforms, rungs, and handholds slippery. It also increases heat stress in operatives, reducing concentration and performance. Regular drying of surfaces may be needed.

Question 11: When using the traditional method of assembly, what is the main disadvantage?

It uses more components
It can only be used outdoors
There is a period where the operative works without edge protection (Correct answer)
It takes twice as long

Correct answer: There is a period where the operative works without edge protection

The traditional method requires the operative to stand on a platform without guard rails while installing them, creating a period of unprotected working at height. This is why the AGR and 3T methods are preferred.

Question 12: What should be checked about the toeboards during a tower scaffold inspection?

That they are made of rubber
That they are removable without tools
That they are transparent so workers can see through them
That they are at least 150mm high, securely fitted on all open sides, and free from damage (Correct answer)

Correct answer: That they are at least 150mm high, securely fitted on all open sides, and free from damage

Toeboards must be at least 150mm high, fitted on all open sides of the platform, securely fixed, and in good condition without splits or damage. They prevent tools and materials from falling off the platform edge onto people below.

Question 13: What precautions are needed when using a tower scaffold in an area with dust or airborne particles?

RPE (respiratory protective equipment) may be needed, and dust can reduce visibility, create slip hazards on platforms, and affect component mechanisms (Correct answer)
Only eye protection is needed
No precautions are needed
Dust improves grip on the platform

Correct answer: RPE (respiratory protective equipment) may be needed, and dust can reduce visibility, create slip hazards on platforms, and affect component mechanisms

Airborne dust or particles may require RPE (masks or respirators), eye protection, and additional cleaning of platforms. Dust accumulation on platforms creates slip hazards, and fine particles can interfere with locking mechanisms on components.

Question 14: What precaution should be taken when using a tower scaffold on a suspended floor (e.g., upper storey)?

Place the tower on a carpet for cushioning
Only use the tower near the floor edges where it is strongest
The floor's load-bearing capacity must be verified to ensure it can support the total weight of the tower, occupants, and materials (Correct answer)
No special precautions are needed indoors

Correct answer: The floor's load-bearing capacity must be verified to ensure it can support the total weight of the tower, occupants, and materials

Suspended floors have load limits that can be exceeded by the concentrated load of a tower scaffold. A structural assessment must confirm the floor can support the combined weight. Point loads through castors or base plates can be particularly problematic.

Question 15: What is the correct procedure for moving a mobile tower scaffold?

Drag it with a vehicle
Push from the top to get better leverage
Reduce height if necessary, remove all persons and loose materials, release brakes, push at base level, and reapply brakes at the new location (Correct answer)
Only move it when occupied so someone can steer from above

Correct answer: Reduce height if necessary, remove all persons and loose materials, release brakes, push at base level, and reapply brakes at the new location

Before moving: check the route is clear, reduce height if exceeding the manufacturer's moving limit, ensure no persons or loose materials are on the platform, release brakes. Push from the base (not the top). Watch for overhead hazards. Relock brakes at destination.

Question 16: What is the 'wind chill' effect and why is it relevant to tower scaffold use?

Wind chill makes air temperature feel colder, reducing manual dexterity, increasing fatigue, and raising the risk of hypothermia in exposed operatives at height (Correct answer)
Wind chill only affects wooden structures
Wind chill is irrelevant to scaffold use
Wind chill improves concentration

Correct answer: Wind chill makes air temperature feel colder, reducing manual dexterity, increasing fatigue, and raising the risk of hypothermia in exposed operatives at height

Wind chill combines wind speed and temperature to create a lower 'feels like' temperature. At height, operatives are exposed with no shelter. Reduced dexterity from cold hands increases the risk of dropping tools or losing grip. Hypothermia can impair judgement.

Question 17: What is the maximum height-to-base ratio for a mobile tower scaffold used outdoors?

4:1
2:1
3.5:1
3:1 (Correct answer)

Correct answer: 3:1

For outdoor use, the maximum height-to-base ratio is 3:1, meaning the tower height must not exceed three times the narrowest base dimension. This accounts for the additional wind loading that occurs outdoors.

Question 18: What must be done with a tower scaffold inspection report if the tower is moved to a different location on site?

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

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 19: Which UK regulation specifically governs working at height?

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

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 20: During assembly, where should tower components be stored before being passed up?

On the roof of an adjacent building
Neatly stacked close to the base but clear of the working area (Correct answer)
Leaning against the partially built tower
On a nearby roadway for easy access

Correct answer: Neatly stacked close to the base but clear of the working area

Components should be stored neatly and close to the tower base for easy access, but clear of walkways and the working area to prevent trip hazards and avoid obstructing emergency access.

Question 21: What precautions should be taken when using a tower scaffold in freezing conditions?

Work faster to stay warm
Only use the tower before sunrise
No special precautions are needed in the cold
Check for ice on platforms, rungs, and components; apply grit to platforms; ensure operatives wear appropriate clothing and gloves without losing grip (Correct answer)

Correct answer: Check for ice on platforms, rungs, and components; apply grit to platforms; ensure operatives wear appropriate clothing and gloves without losing grip

Freezing conditions create ice on platforms, rungs, and handholds, dramatically increasing slip risk. Frost can also weaken components over time. Platforms must be de-iced and gritted. Operatives need warm clothing but must maintain dexterity and grip.

Question 22: Which regulation requires that a rescue plan is in place before work at height commences?

The Electricity at Work Regulations 1989
The Manual Handling Operations Regulations 1992
The Work at Height Regulations 2005 (Correct answer)
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 23: What is the potential penalty for serious breaches of the Work at Height Regulations 2005?

Suspension of the company's website
An unlimited fine and/or up to 2 years' imprisonment (Correct answer)
A verbal warning only
A fixed penalty notice of £100

Correct answer: An unlimited fine and/or up to 2 years' imprisonment

Breaches of health and safety regulations enforced under HSWA 1974 can result in unlimited fines in either the Magistrates' or Crown Court. Individuals (including directors) can face up to 2 years' imprisonment for serious offences.

Question 24: Why must the trapdoor platform hatch be closed after climbing through?

It is optional — it can be left open
To improve the tower's appearance
To provide a full working platform and prevent trip or fall hazards through the open hatch (Correct answer)
To keep insects out

Correct answer: To provide a full working platform and prevent trip or fall hazards through the open hatch

An open trapdoor creates a fall hazard (someone could step into the opening) and a trip hazard (the raised hatch). Closing it creates a complete platform surface, maximising the working area and eliminating these risks.

Question 25: Under WAHR 2005, who is a 'competent person' for inspecting scaffolding?

A person with sufficient training, experience, and knowledge to identify hazards and defects (Correct answer)
Any person on the construction site
Only the tower scaffold manufacturer
Only an HSE inspector

Correct answer: A person with sufficient training, experience, and knowledge to identify hazards and defects

A competent person is someone who has adequate training, practical experience, and sufficient knowledge to identify defects and hazards. For tower scaffolds, PASMA training is the industry-recognised standard.

Question 26: What is the purpose of horizontal braces (ledgers) in a tower scaffold?

To act as a ladder for climbing
To provide lateral stability and maintain frame spacing (Correct answer)
To provide a place to hang tools
To support advertising banners

Correct answer: To provide lateral stability and maintain frame spacing

Horizontal braces connect the two frames together, maintaining the correct spacing and providing lateral stability. Without them, the tower would be prone to racking and collapse.

Question 27: When must stabilisers or outriggers be fitted to a tower scaffold?

Whenever the manufacturer's instructions require them, typically when the tower exceeds the freestanding height-to-base ratio (Correct answer)
Stabilisers are never mandatory
Only when requested by the client
Only when the tower is above 20 metres

Correct answer: Whenever the manufacturer's instructions require them, typically when the tower exceeds the freestanding height-to-base ratio

Stabilisers or outriggers must be fitted whenever the manufacturer's instruction manual specifies them, which is typically when the tower height exceeds the freestanding height-to-base ratio limits. The manufacturer's guidance is definitive.

Question 28: What should be inspected regarding the platforms and decking of a tower scaffold?

That they are painted with non-slip paint
That they are lightweight enough to carry by hand
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)

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 29: What does Regulation 6 of WAHR 2005 require regarding avoiding work at height?

Work at height can never be avoided on construction sites
Regulation 6 does not address avoidance
All work at height must be avoided at all times
Work at height must be avoided so far as is reasonably practicable (Correct answer)

Correct answer: Work at height must be avoided so far as is reasonably practicable

Regulation 6 requires that work at height is avoided so far as is reasonably practicable. If it cannot be avoided, suitable measures must be put in place to prevent or minimise falls.

Question 30: What is the risk of using a tower scaffold in direct strong sunlight?

Sunlight strengthens the aluminium
UV light sanitises the tower
Heat exhaustion and dehydration of operatives, thermal expansion of metal components, and glare affecting vision (Correct answer)
No risks from sunlight

Correct answer: Heat exhaustion and dehydration of operatives, thermal expansion of metal components, and glare affecting vision

Strong sunlight can cause heat exhaustion and dehydration (especially at height where there is no shade). Metal components become hot to touch. Glare can impair vision and depth perception. Adequate water, sun protection, and rest breaks must be provided.

Question 31: What lighting considerations apply when using a tower scaffold?

Lighting is not relevant to scaffold safety
Adequate lighting must be provided for safe access, working, and inspection — natural or artificial, without creating glare or deep shadows (Correct answer)
Only natural daylight is acceptable
Floodlights should be mounted on the tower itself

Correct answer: Adequate lighting must be provided for safe access, working, and inspection — natural or artificial, without creating glare or deep shadows

Under the Workplace (Health, Safety and Welfare) Regulations 1992, adequate lighting must be provided. At height, poor lighting increases the risk of trips, misjudged steps, and unidentified hazards. Light sources must not create glare or deep shadows that obscure hazards.

Question 32: What should be checked about the castors before moving a tower to a new position?

That they are the correct colour for the site
That the castors have been removed and replaced with skids
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 only the front castors are unlocked

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 33: When a worker discovers a defect in a mobile access tower component during use, what is the correct course of action?

Carry out a temporary repair and continue if the fault appears minor
Inform a colleague and allow them to decide whether work can continue
Complete the current task and report the defect at the end of the shift
Stop work immediately, evacuate the tower, secure the area, and report the defect (Correct answer)

Correct answer: Stop work immediately, evacuate the tower, secure the area, and report the defect

Any defect discovered during use requires immediate work stoppage, evacuation, and reporting before work can be permitted to resume, as safety always takes precedence.

Question 34: What is the recommended maximum height for a standard mobile tower scaffold used by a PASMA trained operative?

4 metres
There is no maximum; it depends on the manufacturer's instruction manual (Correct answer)
50 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 35: What is the effect of removing braces from a fully assembled tower to allow better access or working?

It severely compromises the structural integrity and racking resistance, and the tower may collapse (Correct answer)
Removing braces has no effect
It improves ventilation
It makes the tower lighter and more stable

Correct answer: It severely compromises the structural integrity and racking resistance, and the tower may collapse

Braces are critical structural members that provide racking resistance and maintain the tower's geometry. Removing any brace dramatically reduces the tower's strength and can lead to immediate collapse, especially under load or wind.

Question 36: What additional precaution does WAHR 2005 require near fragile surfaces?

Only a verbal warning is required
Prominent warning notices must be displayed and measures taken to prevent falls through the surface (Correct answer)
Fragile surfaces must be replaced before any work begins
Work near fragile surfaces is always prohibited

Correct answer: Prominent warning notices must be displayed and measures taken to prevent falls through the surface

Regulation 9 requires that no person goes onto or near a fragile surface unless it is the only practicable option. Warning notices must be displayed, and platforms, coverings, guard rails, or fall arrest systems must be used to prevent falls.

Question 37: When assembling a tower, at what height must a platform with edge protection first be provided?

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

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 38: How should waste materials be removed from a tower scaffold platform?

Drop them inside the tower structure
Throw them off the platform
Leave them on the platform until disassembly
Lower them to ground level using bags, buckets, or a chute, or pass them down through the internal access (Correct answer)

Correct answer: Lower them to ground level using bags, buckets, or a chute, or pass them down through the internal access

Waste must never be thrown from the platform as it endangers people below. It should be lowered in bags or buckets using a gin wheel, passed down through the internal access, or directed down an enclosed rubble chute if appropriate. This prevents injuries and maintains a tidy site.

Question 39: What is the function of diagonal braces on a tower scaffold?

They are used solely for climbing access
They prevent racking (lateral sway) of the tower (Correct answer)
They reduce the weight of the tower
They are decorative only

Correct answer: They prevent racking (lateral sway) of the tower

Diagonal braces prevent racking, which is the tendency of the tower to sway or lean sideways. They triangulate the structure, converting it from a potentially unstable parallelogram into rigid triangles.

Question 40: What information must be included in a written rescue plan for work at height?

Only the telephone number of the emergency services
The rescue method, equipment available, personnel trained, communication procedures, and estimated rescue time (Correct answer)
The name of the nearest hospital
Only the location of the first aid kit

Correct answer: The rescue method, equipment available, personnel trained, communication procedures, and estimated rescue time

A rescue plan must detail how a casualty will be reached and recovered, the equipment to be used, who is trained to carry out the rescue, how communication will work, and the expected time to complete the rescue.

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%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds