I85PREP
⌘ K
Cert III Scaffolding study materials
Cert III Scaffolding study resources

Cert III Scaffolding practice questions

One question at a time. Build your Cert III Scaffolding understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Core units of competency

Under WHS legislation, what is the primary duty of a person conducting a business or undertaking (PCBU) regarding scaffolding work?

  1. Ensure health and safety so far as is reasonably practicable Correct answer.
  2. Provide personal protective equipment only when requested
  3. Delegate all safety responsibilities to the principal contractor
  4. Guarantee that no worker is ever injured on site

Explanation

The primary duty of a PCBU is to ensure the health and safety of workers and others so far as is reasonably practicable. This duty covers eliminating or minimising risks through a hierarchy of controls rather than guaranteeing an injury-free outcome. Responsibility cannot simply be delegated away or limited to supplying PPE on request.

Question 2Core units of competency

What is the minimum height at which fall protection is generally required for scaffolding work under model WHS regulations?

  1. 1.5 metres
  2. 1.0 metre
  3. 2.0 metres Correct answer.
  4. 3.0 metres

Explanation

Model WHS regulations require fall protection where a person could fall two metres or more. This threshold applies to scaffold platforms, so edge protection or a fall-arrest system is needed at that height. Lower heights may still require control measures if other hazards exist.

Question 3Core units of competency

Which document must be prepared before erecting a scaffold from which a person could fall more than four metres?

  1. A safe work method statement Correct answer.
  2. A material delivery docket
  3. A toolbox talk register
  4. A site induction checklist

Explanation

High-risk construction work, including erecting a scaffold where a fall of more than four metres is possible, requires a safe work method statement (SWMS). The SWMS identifies hazards, controls and the sequence of work before the task begins. It must be reviewed and kept on site.

Question 4Core units of competency

A scaffold is being planned next to a public footpath in a busy shopping area. Which control should be considered first to protect pedestrians?

  1. Schedule erection work only during daylight hours
  2. Ask pedestrians to walk carefully past the work area
  3. Install overhead protection and hoarding to separate the public Correct answer.
  4. Erect warning tape around the base of the scaffold

Explanation

The hierarchy of controls favours isolating the hazard from people, so physical barriers such as hoarding and overhead protection come before administrative measures. Separating the public from falling objects and the work zone is the most reliable control. Warning tape and verbal instructions rely on people complying.

Question 5Core units of competency

What is the correct sequence when erecting a modular scaffold?

  1. Fit ties last after the full scaffold is complete
  2. Set out base plates and standards, then ledgers, then platforms and edge protection Correct answer.
  3. Place platforms first, then add standards and ledgers
  4. Install toe boards first, then standards, then transoms

Explanation

Erection follows a stable bottom-up sequence: set out and level base plates, erect standards, connect ledgers and transoms, then add platforms, guardrails and toe boards. Each lift must be stable before the next is added. Ties are installed progressively as the scaffold rises.

Question 6Core units of competency

Why must a scaffold be tied to a structure or otherwise stabilised?

  1. To resist wind and lateral forces and prevent collapse Correct answer.
  2. To allow the scaffold to be moved without dismantling
  3. To make the scaffold easier to dismantle
  4. To increase the working load rating of the platform

Explanation

Ties anchor the scaffold to a stable structure so it can resist wind loading and other lateral forces. Without adequate ties the scaffold can overturn or rack. Ties do not change the load rating or the dismantling sequence.

Question 7Core units of competency

What does the load rating of a scaffold platform describe?

  1. The wind speed the scaffold can withstand
  2. The number of workers allowed on site at one time
  3. The weight of the scaffold components themselves
  4. The maximum weight it can safely support per duty classification Correct answer.

Explanation

The duty classification states the uniformly distributed load a platform is designed to carry, such as light, medium or heavy duty. Workers must not exceed this rating with people, materials and tools combined. It does not describe wind resistance or total site numbers.

Question 8Core units of competency

Which combination of components forms edge protection on a working platform?

  1. Tie, brace and reveal
  2. Base plate, sole board and standard
  3. Guardrail, mid-rail and toe board Correct answer.
  4. Ledger, transom and putlog

Explanation

Edge protection consists of a top guardrail, a mid-rail and a toe board to prevent falls and falling objects. These components must be fitted to every open edge and end of a platform. Other components listed are structural or foundation elements.

Question 9Core units of competency

Which footwear is most appropriate for a scaffolder working at height on steel platforms?

  1. Steel-capped boots with slip-resistant soles Correct answer.
  2. Smooth-soled dress shoes
  3. Lightweight running shoes for mobility
  4. Open sandals for ventilation

Explanation

Steel-capped, slip-resistant boots protect the feet from impact and provide grip on steel platforms and ladders. Good sole tread reduces slip risk, which is a major cause of falls. Footwear without toe protection or grip increases injury risk.

Question 10Core units of competency

Before using a harness and lanyard for fall arrest, what should a worker check?

  1. That the lanyard is longer than the fall distance
  2. That the harness is worn loosely for comfort
  3. That the anchor point is below waist height
  4. That the equipment is inspected, in date and correctly fitted Correct answer.

Explanation

Fall-arrest equipment must be inspected before each use, within its service life, and fitted correctly to the user. The anchor point must be above the worker and capable of withstanding the arrest forces. A loose fit or excessive lanyard length increases fall distance and injury risk.

Question 11Core units of competency

What is the purpose of a sole board under a scaffold standard?

  1. To spread the load over a larger ground area Correct answer.
  2. To anchor the scaffold to the building
  3. To connect the standard to the ledger
  4. To provide a step for climbing

Explanation

Sole boards spread the concentrated load from a standard over a larger area of ground, reducing the risk of settlement or penetration. They are used with base plates on suitable bearing surfaces. They do not connect components or anchor the scaffold.

Question 12Core units of competency

A scaffold standard is set on soft, recently filled ground. What is the most appropriate action?

  1. Compact and level the ground or use a designed foundation before erecting Correct answer.
  2. Reduce the number of workers on the platform
  3. Proceed because base plates spread the load sufficiently
  4. Add extra toe boards to compensate for settlement

Explanation

Foundations must be able to support the scaffold loads without settlement, so soft or backfilled ground needs compaction, leveling or a designed foundation such as timbers or concrete. Base plates alone cannot compensate for unstable ground. Edge protection and worker numbers do not address foundation failure.

Question 13Core units of competency

What is the main hazard of leaving a partially erected scaffold unattended overnight?

  1. It becomes impossible to dismantle later
  2. It will void the manufacturer's warranty
  3. It may be unstable and unsecured against wind or unauthorised access Correct answer.
  4. It will automatically lose its load rating

Explanation

A partially erected scaffold may lack full bracing, ties and edge protection, making it vulnerable to wind and unauthorised access. It should be stabilised, secured and signed, or not left in that state. Load rating and dismantling are not automatically affected.

Question 14Core units of competency

Which practice is required when accessing a scaffold working platform?

  1. Using the guardrail as a handhold to swing onto the platform
  2. Jumping from an adjacent structure
  3. Using a designated ladder or stair access installed for the purpose Correct answer.
  4. Climbing the outside bracing members

Explanation

Access must be provided by a designed ladder, stairway or ramp that is secured and extends above the landing. Climbing braces or guardrails is unsafe and prohibited. Workers must never jump onto a platform from another structure.

Question 15Core units of competency

What should a worker do if a scaffold component is found to be damaged or corroded?

  1. Straighten it and continue using it
  2. Paint over the damage to prevent further corrosion
  3. Use it on a light-duty section only
  4. Tag it out of service and report it for replacement Correct answer.

Explanation

Damaged or excessively corroded components must be removed from service, tagged and reported so they can be replaced. Their strength is compromised and they cannot be used at any duty level. Repairing or hiding damage does not restore structural capacity.

Question 16Core units of competency

Which of the following best describes 'working at height' under WHS regulations?

  1. Work on any structure taller than the worker
  2. Work in any place where a person could fall a distance liable to cause injury Correct answer.
  3. Work performed only above three metres
  4. Work performed outdoors on ladders only

Explanation

Working at height is defined broadly as work where a person could fall from one level to another and be injured. It is not limited to a specific height, structure type or equipment. The focus is on the risk of injury from a fall.

Question 17Core units of competency

A scaffolder is planning to lift a heavy steel standard manually. Which control follows the hierarchy of controls best?

  1. Bend at the waist and lift quickly
  2. Use a mechanical lifting aid or team lift where practicable Correct answer.
  3. Wear a back brace and proceed alone
  4. Ask a workmate to watch and give verbal encouragement

Explanation

The hierarchy of controls places engineering and mechanical aids above administrative measures and PPE. Using a hoist or a coordinated team lift reduces the force on any one worker. Technique, encouragement and braces do not remove the hazardous manual task.

Question 18Core units of competency

What is the correct action when a scaffold is to be altered or partially dismantled?

  1. Remove components in any order to save time
  2. Leave guardrails off until the job is finished
  3. Remove all ties first to free the scaffold
  4. Follow the design and sequence, maintaining stability and edge protection throughout Correct answer.

Explanation

Alteration and dismantling must follow the designed sequence so the remaining structure stays stable and protected. Ties are removed only as the scaffold is progressively dismantled, and edge protection is maintained. Removing ties or guardrails early can cause collapse or falls.

Question 19Core units of competency

What information should a scaffolder check on a scaffold tag or handover certificate?

  1. The delivery date of the components
  2. The name of the scaffold manufacturer only
  3. The colour code of the scaffold boards
  4. The duty rating, date of inspection and whether the scaffold is safe to use Correct answer.

Explanation

A scaffold tag or handover certificate records the duty rating, inspection status, date and whether the scaffold is complete and safe for use. Workers must check it before using the scaffold. Manufacturer, delivery and board colour are not indicators of safety status.

Question 20Core units of competency

How often must a scaffold from which a person could fall be inspected by a competent person?

  1. Only when a worker reports a concern
  2. Every 12 months
  3. Once only, at the time of erection
  4. At least every 30 days and after events that may affect stability Correct answer.

Explanation

Scaffolds at risk of a fall require inspection by a competent person at intervals of no more than 30 days, and also after alterations, impacts or adverse weather. Records of inspections must be kept. A single inspection or annual check is insufficient.

Question 21Core units of competency

A worker notices that a mobile scaffold's castors are not locked while it is in use. What is the correct response?

  1. Ask another worker to hold the scaffold steady
  2. Move the scaffold slowly while workers remain on it
  3. Stop work, lock the castors and check the scaffold before continuing Correct answer.
  4. Continue but keep the load light

Explanation

Mobile scaffolds must have castors locked before use and should never be moved while workers are on the platform. Unlocked castors allow the scaffold to roll and overturn. Work must stop until the scaffold is secured and checked.

Question 22Core units of competency

Which statement about the maximum height of a mobile scaffold relative to its base dimensions is correct?

  1. It should not exceed the ratio specified by the manufacturer or designer Correct answer.
  2. It can be doubled in height if extra outriggers are fitted without design advice
  3. It may be built to any height if castors are locked
  4. It is limited only by the length of the ladder

Explanation

Mobile scaffolds have a maximum height-to-base ratio set by the manufacturer or designer to maintain stability. Exceeding it increases the risk of overturning, even with locked castors. Outriggers may help but must be used according to design instructions.

Question 23Core units of competency

What is the purpose of a handover certificate for a completed scaffold?

  1. To record the wages paid to scaffolders
  2. To list the tools left on the platform
  3. To confirm the scaffold has been erected to design and is safe for its intended duty Correct answer.
  4. To authorise the sale of scaffold components

Explanation

A handover certificate confirms the scaffold has been completed to the design, inspected and is safe for its stated duty. It transfers information to the users about load limits and conditions of use. It is not a financial or commercial document.

Question 24Core units of competency

A scaffold platform has a gap between the platform and the structure of 300 mm. What risk does this create and what is the control?

  1. A risk only if workers are under 1.8 metres tall
  2. A fall-through and object-fall hazard; reduce the gap or provide infill Correct answer.
  3. No risk, because guardrails are fitted on the outside
  4. A risk that is controlled by painting the gap yellow

Explanation

Gaps between the platform and the structure can allow workers, tools or materials to fall through. The gap should be minimised or covered with securely fixed infill. Guardrails on the outer edge do not protect against falls through an inner gap.

Question 25Core units of competency

Why is it important to maintain a scaffold's bracing system during use?

  1. It increases the platform's allowable load
  2. It replaces the need for guardrails
  3. It provides rigidity and transfers lateral loads to the foundations and ties Correct answer.
  4. It allows the scaffold to be moved without dismantling

Explanation

Bracing gives the scaffold rigidity and carries lateral loads such as wind to the foundations and ties. Removing or altering bracing can cause racking or collapse. Bracing does not increase load ratings or replace edge protection.

Question 26Core units of competency

What is the primary purpose of a scaffold's base plate?

  1. To level the scaffold on sloping ground
  2. To distribute the load from the standard over a larger area Correct answer.
  3. To provide a fixing point for the guardrail
  4. To connect the standard to the ledger

Explanation

A base plate spreads the concentrated load from the standard over a wider area of the ground or sole board, reducing the risk of settlement. It is a load-distribution component, not a structural connector for ledgers or guardrails.

Question 27Core units of competency

Which component is designed to prevent a scaffold from overturning due to wind or other lateral forces?

  1. Base jack
  2. Tie assembly Correct answer.
  3. Toe board
  4. Guardrail

Explanation

Tie assemblies connect the scaffold to a structure and resist lateral forces such as wind, stabilising the scaffold. Toe boards, guardrails, and base jacks serve other functions and do not provide overall stability against overturning.

Question 28Core units of competency

When erecting a scaffold, what is the minimum height above a working platform at which a guardrail must be installed?

  1. 900 mm Correct answer.
  2. 500 mm
  3. 1500 mm
  4. 1200 mm

Explanation

Australian scaffolding standards require a top guardrail at a minimum height of 900 mm above the platform, with a mid-rail and toe board also fitted. This height is designed to restrain a person from falling.

Question 29Core units of competency

What is the correct way to store scaffold components on site to prevent damage?

  1. Stack them in a heap on the ground
  2. Store them in a dry, covered area on racks or pallets Correct answer.
  3. Lean them against the scaffold
  4. Leave them exposed to weather to allow inspection

Explanation

Scaffold components should be stored in a dry, covered area on racks or pallets to prevent corrosion, bending, and damage. Proper storage also keeps the site tidy and reduces tripping hazards.

Question 30Core units of competency

Which type of scaffold is specifically designed to be suspended from overhead structures?

  1. Mobile scaffold
  2. Suspended scaffold Correct answer.
  3. Birdcage scaffold
  4. Cantilever scaffold

Explanation

A suspended scaffold is hung from overhead supports such as beams or roof structures using ropes or chains. Cantilever scaffolds project from a building, mobile scaffolds are movable, and birdcage scaffolds are internal stand-alone structures.

Question 31Core units of competency

What is the purpose of a scaffold's ledger?

  1. To provide a horizontal member that connects standards and supports transoms Correct answer.
  2. To prevent the scaffold from sinking into the ground
  3. To tie the scaffold to the building
  4. To support the platform decking

Explanation

A ledger is a horizontal member that runs along the scaffold, connecting standards and supporting transoms that carry the platform. It is a key structural element for load distribution and stability.

Question 32Core units of competency

What is the minimum height of a toe board on a scaffold working platform?

  1. 150 mm Correct answer.
  2. 50 mm
  3. 200 mm
  4. 100 mm

Explanation

A toe board must be at least 150 mm high to prevent tools and materials from falling off the platform. This height is specified in scaffolding standards and is measured from the platform surface.

Question 33Core units of competency

Which of the following is a primary hazard associated with using a mobile scaffold?

  1. Corrosion of the castors
  2. Inadequate lighting
  3. Overturning due to movement or wind Correct answer.
  4. Excessive height of the platform

Explanation

Mobile scaffolds are prone to overturning if moved while occupied, if the base is too small for the height, or if subjected to wind loads. Ensuring castors are locked and the scaffold is not moved with people on it are key controls.

Question 34Core units of competency

What is the correct procedure for a scaffolder to access a working platform above 2 metres?

  1. Use a ladder or stairway designed for the scaffold Correct answer.
  2. Use the scaffold's cross bracing as a ladder
  3. Climb the outside of the scaffold
  4. Jump from an adjacent structure

Explanation

Access to a scaffold platform must be via a designed ladder or stairway that is securely fixed to the scaffold. Climbing the outside or using bracing is dangerous and not permitted.

Question 35Core units of competency

A scaffolder needs to move a mobile scaffold a short distance on a flat concrete slab. What is the minimum precaution required?

  1. Ask a colleague to ride on the platform to steer
  2. Move it with the castors unlocked
  3. Ensure no people or materials are on the platform before moving Correct answer.
  4. Remove the guardrails to reduce weight

Explanation

Before moving a mobile scaffold, all people and materials must be removed from the platform to prevent falls or instability. The scaffold should be moved by pushing at the base, with castors unlocked only for the move.

Question 36Core units of competency

When checking a scaffold coupler for damage, which defect would most likely compromise its strength?

  1. A loose bolt
  2. A crack in the casting Correct answer.
  3. A missing identification tag
  4. Paint peeling off

Explanation

A crack in the casting of a coupler significantly reduces its structural integrity and it must be removed from service. Loose bolts can be tightened, paint peeling is cosmetic, and a missing tag is an administrative issue.

Question 37Core units of competency

What is the purpose of a scaffold's plan bracing?

  1. To provide a walkway for workers
  2. To resist horizontal forces and prevent distortion of the scaffold Correct answer.
  3. To support the platform from underneath
  4. To attach the scaffold to the ground

Explanation

Plan bracing is installed in the horizontal plane to resist lateral forces and prevent the scaffold from distorting or collapsing. It is a stability measure, not a walkway or platform support.

Question 38Core units of competency

Which factor is most important when determining the safe working load of a scaffold?

  1. The colour of the scaffold components
  2. The number of workers on site
  3. The design and spacing of the scaffold members Correct answer.
  4. The weather forecast

Explanation

The safe working load is determined by the scaffold's design, including the size and spacing of standards, ledgers, and transoms, and the platform's load capacity. Colour, workforce numbers, and weather do not determine the load rating.

Question 39Core units of competency

When erecting a scaffold near overhead power lines, what is the minimum safe approach distance for a person holding a metal scaffold tube?

  1. 6 metres Correct answer.
  2. 1 metre
  3. 3 metres
  4. 10 metres

Explanation

The minimum safe approach distance for a person holding a long metal object near overhead power lines is typically 6 metres, as per industry guidance. This distance reduces the risk of electric shock from arcing.

Question 40Core units of competency

What is the correct action if a scaffold is found to be missing a tie during an inspection?

  1. Continue using the scaffold with caution
  2. Tag the scaffold as incomplete and do not use it until the tie is replaced Correct answer.
  3. Replace the tie with a rope
  4. Note it in the logbook and continue

Explanation

A missing tie compromises the scaffold's stability and it must be tagged as incomplete and not used until the tie is properly replaced. Using it with caution or substituting with a rope is unsafe.

Question 41Core units of competency

Which of the following is a correct method for securing a ladder to a scaffold?

  1. Secure the ladder only at the bottom
  2. Use a ladder that is too short and rest it on the platform
  3. Tie the ladder to the scaffold with rope at the top and bottom Correct answer.
  4. Lean the ladder against the guardrail without securing

Explanation

A ladder must be secured at both the top and bottom to prevent movement. Tying with rope at both points is a common method, ensuring the ladder cannot slip or fall.

Question 42Core units of competency

What is the main purpose of a scaffold handover certificate?

  1. To list the components used in the scaffold
  2. To provide a warranty for the scaffold
  3. To record the names of all workers who used the scaffold
  4. To confirm that the scaffold has been inspected and is safe for use Correct answer.

Explanation

A handover certificate confirms that the scaffold has been erected, inspected, and is safe for use by others. It is a formal record of compliance and safety.

Question 43Core units of competency

When dismantling a scaffold, what is the correct sequence?

  1. Remove ties first, then work from the top down
  2. Remove all guardrails first, then ties
  3. Remove ties last, working from the top down Correct answer.
  4. Start from the bottom and work upwards

Explanation

Scaffolds should be dismantled in the reverse order of erection, generally from the top down, with ties removed progressively as the scaffold is lowered. Removing ties first would destabilise the scaffold.

Question 44Core units of competency

What is the purpose of a scaffold's transom?

  1. To support the base plate
  2. To provide a horizontal support for the platform and connect ledgers Correct answer.
  3. To tie the scaffold to the building
  4. To act as a diagonal brace

Explanation

Transoms are horizontal members that support the platform and connect ledgers, transferring loads to the standards. They are essential for platform support and structural integrity.

Question 45Core units of competency

Which of the following is a critical check before using a scaffold after a period of strong winds?

  1. Check the colour of the scaffold tags
  2. Check the number of workers on site
  3. Check the weather forecast for the next day
  4. Check that the scaffold is still plumb and ties are intact Correct answer.

Explanation

After strong winds, scaffolds can be displaced or ties loosened, so a competent person must check plumbness and tie integrity before use. Other checks are not relevant to structural safety.

Question 46Core units of competency

What is the minimum overlap required when using scaffold planks to form a platform?

  1. 50 mm
  2. 150 mm
  3. 200 mm Correct answer.
  4. 100 mm

Explanation

Scaffold planks must overlap by at least 200 mm and be secured to prevent movement. This overlap ensures the platform is continuous and safe.

Question 47Core units of competency

A scaffold is to be erected on a slope. What is the most appropriate method to ensure the standards are vertical?

  1. Ignore the slope as scaffolds are flexible
  2. Bend the standards to fit
  3. Use longer standards on the low side
  4. Use base jacks and packers to level the base Correct answer.

Explanation

Adjustable base jacks and packers allow the scaffold to be levelled on a slope, ensuring standards remain vertical. Bending standards or ignoring the slope compromises structural integrity.

Question 48Core units of competency

What is the primary risk if a scaffold's sole board is too small for the load?

  1. The scaffold may become too tall
  2. The scaffold may become lighter
  3. The scaffold may become electrically charged
  4. The scaffold may sink or settle unevenly Correct answer.

Explanation

A sole board that is too small cannot distribute the load adequately, leading to settlement or uneven sinking of the scaffold. This can cause instability and potential collapse.

Question 49Core units of competency

When inspecting a scaffold, which of the following would be classified as a major defect requiring immediate shutdown?

  1. A loose guardrail bolt
  2. A cracked standard at the base Correct answer.
  3. A missing toe board on one platform
  4. A missing identification tag

Explanation

A cracked standard at the base is a major structural defect that could lead to collapse and requires immediate shutdown and repair. Other defects are important but may not require full shutdown.

Question 50Core units of competency

What is the correct procedure if a scaffold is to be left partially erected overnight?

  1. Leave it as is with no signage
  2. Remove all ties to reduce wind load
  3. Erect warning signs and barricades to prevent access Correct answer.
  4. Cover it with a tarp

Explanation

A partially erected scaffold must be secured against access, typically with warning signs and barricades, to prevent unauthorised use. Removing ties or leaving it unmarked is unsafe.