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High Risk Work Licence - Slewing Mobile Crane C2 (20t) study materials
High Risk Work Licence - Slewing Mobile Crane C2 (20t) study resources

High Risk Work Licence - Slewing Mobile Crane C2 (20t) practice questions

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Question 1Legislative and regulatory requirements, standards and duty of care

Under the model WHS Regulations, what must a person conducting a business or undertaking (PCBU) do before a slewing mobile crane is used to lift persons?

  1. Ensure the crane has been in service for at least 12 months without incident
  2. Obtain written approval from the crane manufacturer for the specific lift
  3. Notify the relevant regulator at least 24 hours before the lift
  4. Complete a documented risk assessment and use a suitable personnel box or platform designed for the purpose Correct answer.

Explanation

Lifting persons with a crane is a high-risk activity that requires the PCBU to identify hazards and control risks, generally documented in a safe work method statement or lift study, and to use purpose-designed personnel boxes with a competent operator and spotter. Manufacturer approval is not a general legal precondition, and regulator notification is not required for routine personnel lifting.

Question 2Legislative and regulatory requirements, standards and duty of care

Which document sets out the general duty of a PCBU to ensure health and safety so far as is reasonably practicable?

  1. AS 2550.1 Crane safety series
  2. The manufacturer's operation manual
  3. The applicable WHS Act in the jurisdiction Correct answer.
  4. The crane operator's logbook

Explanation

The primary duty of care is imposed by the WHS Act enacted in each jurisdiction, which requires the PCBU to eliminate or minimise risks so far as is reasonably practicable. Standards and manuals are guidance or evidence of good practice, not the source of the statutory duty itself.

Question 3Legislative and regulatory requirements, standards and duty of care

A PCBU engages a subcontractor to operate a slewing mobile crane on a shared site. What is the PCBU's duty regarding the subcontractor's workers?

  1. Transfer all safety responsibility to the crane hire company
  2. Ensure the subcontractor's workers are not exposed to risks arising from the PCBU's operations, so far as reasonably practicable Correct answer.
  3. Provide only general site induction and nothing further
  4. Rely entirely on the subcontractor because those workers are not the PCBU's employees

Explanation

The primary duty extends to other persons, including contractors and their workers, whose health and safety may be affected by the PCBU's undertaking. Duties cannot be contracted away, so the PCBU must consult, coordinate and control risks across the shared workplace.

Question 4Legislative and regulatory requirements, standards and duty of care

What does the term 'reasonably practicable' require when deciding on risk controls for crane operations?

  1. Following only controls that have previously been used on site
  2. Doing whatever the crane operator personally prefers
  3. Applying the cheapest control that is available on site
  4. Weighing the likelihood and severity of harm against the cost and difficulty of available controls Correct answer.

Explanation

Reasonably practicable involves weighing the likelihood and degree of harm against the availability, suitability, cost and difficulty of eliminating or reducing the risk. Cost alone does not justify inaction where the risk is serious.

Question 5Legislative and regulatory requirements, standards and duty of care

Which activity involving a slewing mobile crane would typically require a safe work method statement (SWMS) in jurisdictions that regulate high-risk construction work?

  1. Using the crane to lift persons in a personnel box during construction work Correct answer.
  2. Refuelling the crane at the depot
  3. Washing the crane windows
  4. Parking the crane overnight in a fenced compound

Explanation

High-risk construction work categories include work involving crane lifts of persons and certain crane operations, which require a SWMS before work begins. Routine activities such as refuelling, cleaning or parking do not fall within those categories.

Question 6Legislative and regulatory requirements, standards and duty of care

Who may legally direct the movement of a slewing mobile crane's load when the operator cannot see the landing area?

  1. The crane hire company's office administrator
  2. A designated dogger or rigger holding the relevant high risk work licence Correct answer.
  3. The site visitor signing the attendance register
  4. Any nearby worker who is available

Explanation

Where the operator's view is obstructed, a licensed dogger or rigger must direct the load using agreed signals. The person directing must hold the appropriate high risk work licence for the work being performed.

Question 7Legislative and regulatory requirements, standards and duty of care

What is the main purpose of consulting with workers before changing a crane lifting procedure?

  1. To reduce the amount of documentation required
  2. To satisfy a formality after the decision has already been implemented
  3. To shift legal liability from the PCBU to the workers
  4. To draw on workers' knowledge of the hazards and improve the effectiveness of risk controls Correct answer.

Explanation

Consultation is a statutory duty and is intended to draw on the practical knowledge of workers who perform the task, leading to better hazard identification and more workable controls. It does not transfer the PCBU's legal duties or reduce documentation obligations.

Question 8Legislative and regulatory requirements, standards and duty of care

A crane operator holds a C2 licence. Which statement best describes the scope of that licence class?

  1. It authorises slewing mobile crane operation up to a specified capacity, with higher capacity classes required beyond that Correct answer.
  2. It authorises any crane of any capacity without restriction
  3. It authorises rigging work in addition to crane operation
  4. It authorises only non-slewing cranes

Explanation

High risk work licences are issued by class, and the C2 class covers slewing mobile cranes up to the capacity specified for that class. Operating a crane beyond that capacity requires the appropriate higher class licence.

Question 9Legislative and regulatory requirements, standards and duty of care

What must happen to a high risk work licence that has passed its expiry date while the operator continues working?

  1. The licence automatically converts to a higher class
  2. The licence remains valid until the next renewal notice arrives
  3. The operator may continue if a supervisor signs a temporary authority
  4. The operator is working unlicensed and the PCBU must not permit the work to continue Correct answer.

Explanation

A high risk work licence is valid only for the period stated on it, and performing licensed work after expiry is unlicensed work. The PCBU must not allow the task to proceed until a valid licence is held.

Question 10Legislative and regulatory requirements, standards and duty of care

Which of the following is a duty of the crane operator under WHS law?

  1. Design the site layout and approve the lift study
  2. Procure the crane and verify its registration
  3. Guarantee that no incident occurs during the lift
  4. Take reasonable care for their own safety and the safety of others, and comply with reasonable safety instructions Correct answer.

Explanation

Workers, including licensed crane operators, must take reasonable care for their own health and safety and that of others, and must follow reasonable instructions and cooperate with safety measures. Planning, procurement and site design sit with the PCBU or principal contractor.

Question 11Legislative and regulatory requirements, standards and duty of care

A principal contractor on a construction site becomes aware that a crane operator's licence has been suspended. What is the most appropriate action?

  1. Stop the operator from performing licensed crane work and arrange a licensed replacement before work resumes Correct answer.
  2. Allow the operator to continue until the end of the shift to avoid delay
  3. Record the suspension in the site diary and take no further action
  4. Ask the operator to sign a declaration that they are competent

Explanation

Permitting unlicensed crane operation is a breach of WHS duties and creates an immediate risk of serious harm. Work must stop until a person holding a valid licence performs the task.

Question 12Legislative and regulatory requirements, standards and duty of care

Which standard series is commonly relied on in Australia as evidence of good practice for the safe use of cranes?

  1. AS 3600 series
  2. AS 3000 series
  3. AS 1684 series
  4. AS 2550 series Correct answer.

Explanation

The AS 2550 series covers crane safety, including general requirements and specific crane types, and is commonly used as evidence of good practice. The other series deal with electrical installations, timber framing and concrete structures respectively.

Question 13Legislative and regulatory requirements, standards and duty of care

What is the role of a competent person when inspecting a slewing mobile crane before use?

  1. To operate the crane during the inspection lift
  2. To sign off the site's environmental management plan
  3. To inspect the crane and identify defects or conditions that make it unsafe to operate Correct answer.
  4. To authorise payment for crane hire

Explanation

A competent person has the training, knowledge and experience to inspect the crane and recognise defects or conditions that affect safe operation. Defects identified must be reported and the crane taken out of service until rectified.

Question 14Legislative and regulatory requirements, standards and duty of care

A crane is being set up near an overhead power line. Which legal duty applies to the PCBU before work begins?

  1. Proceed if the crane has a rubber-tyred chassis
  2. Proceed only at night when the line is less visible
  3. Identify the hazard, consult the electricity supply authority and implement controls such as exclusion zones or isolation Correct answer.
  4. Rely on the operator to keep a safe distance by eye

Explanation

Overhead lines are a serious electrocution hazard, and the PCBU must identify the hazard, consult the supply authority and apply controls such as de-energising, isolation or defined exclusion zones consistent with the relevant code of practice. Visual judgement alone is not an adequate control.

Question 15Legislative and regulatory requirements, standards and duty of care

What is the purpose of a register of high risk work licences kept by a PCBU?

  1. To list the crane's load chart capacities
  2. To record the crane's maintenance history
  3. To verify that each worker performing licensed work holds a current, valid licence for the task Correct answer.
  4. To document the site's emergency evacuation drills

Explanation

A licence register enables the PCBU to confirm that licensed work is only performed by people holding current, valid licences for the relevant class. It supports compliance verification and helps prevent unlicensed work.

Question 16Legislative and regulatory requirements, standards and duty of care

An incident occurs where a crane load drops and narrowly misses a worker. What notification obligation applies?

  1. Record the event in the operator's logbook and take no further action
  2. Notify the crane manufacturer only
  3. Notify the regulator immediately as a dangerous incident, in addition to preserving the site Correct answer.
  4. Take no action because no one was injured

Explanation

A near miss involving a falling load is a dangerous incident under WHS law, and the regulator must be notified immediately, with the site preserved so far as is practicable. Injury is not required to trigger the notification duty.

Question 17Legislative and regulatory requirements, standards and duty of care

Which party is responsible for ensuring that a crane's load chart and operating manual are available to the operator?

  1. The operator's family
  2. The delivery driver
  3. The PCBU providing the crane and the workplace Correct answer.
  4. The site visitor

Explanation

The PCBU must ensure that plant is provided with adequate information, including the load chart and operating manual, and that the operator can access it. This supports safe planning and operation of the crane.

Question 18Legislative and regulatory requirements, standards and duty of care

A crane operator is asked to perform a lift that exceeds the crane's rated capacity. What should the operator do?

  1. Perform the lift slowly to reduce the risk
  2. Perform the lift using a longer boom to compensate
  3. Perform the lift if a supervisor gives verbal approval
  4. Refuse the lift and report the request, because the load chart limits must not be exceeded Correct answer.

Explanation

The rated capacity in the load chart is a limit that must not be exceeded, and an operator must not carry out an unsafe instruction. The operator should refuse, report the request and have the lift replanned within capacity.

Question 19Legislative and regulatory requirements, standards and duty of care

Which of the following best describes the duty to consult, coordinate and cooperate between duty holders on a shared crane site?

  1. Consultation is only required after an incident
  2. Only the principal contractor has any duty to consult
  3. Consultation is optional where the site is small
  4. Each duty holder must consult and coordinate activities with others so far as necessary to control risks Correct answer.

Explanation

Where more than one duty holder is involved, WHS law requires each to consult, coordinate and cooperate with the others so far as necessary to control risks. This applies regardless of site size and before work begins.

Question 20Legislative and regulatory requirements, standards and duty of care

What is the purpose of holding a pre-start meeting with the crane crew before a complex lift?

  1. To assign blame if the lift fails
  2. To replace the need for a documented lift plan
  3. To confirm roles, signals, exclusion zones and the sequence of the lift among all involved Correct answer.
  4. To satisfy the crane hire invoice requirements

Explanation

A pre-start meeting confirms that everyone understands their role, the communication signals, exclusion zones and the lift sequence, which supports safe execution of the planned lift. It supplements rather than replaces the documented lift plan.

Question 21Hazard identification, risk assessment and control measures

Before a slewing mobile crane lifts a load beside a live powerline, which control measure should be applied first?

  1. Post a spotter under the wires to warn the operator
  2. Reduce boom length so the crane stays lower
  3. Arrange de-energising and isolation of the line with the network operator Correct answer.
  4. Increase swing speed to minimise time near the line

Explanation

Eliminating the hazard at its source is the highest-order control, so the preferred action is to have the electricity network operator de-energise and isolate the line, or arrange an approved exclusion zone with written confirmation of safe approach distances. Only when isolation is not reasonably practicable should lesser measures such as exclusion zones, goalposts and spotters be used.

Question 22Hazard identification, risk assessment and control measures

A crane is set up on compacted fill next to an excavation. Which information is most important when assessing ground bearing capacity for the outriggers?

  1. The number of workers who will stand near the crane
  2. A geotechnical assessment of the supporting material and any underground voids or services Correct answer.
  3. The colour of the soil exposed in the trench
  4. The age of the crane's tyres

Explanation

Outrigger loads are concentrated and can be very high, so the ground must be assessed by a competent person, ideally with geotechnical input, for bearing capacity, slope stability, backfilled trenches, voids and buried services. The assessment determines whether spreader mats, pads or a different position are needed to prevent penetration or collapse.

Question 23Hazard identification, risk assessment and control measures

What is the main purpose of a lift study or lift plan before a complex crane lift?

  1. To identify hazards and specify controls, rigging, crane configuration and responsibilities before work starts Correct answer.
  2. To record the crane's service history
  3. To replace the need for a pre-start inspection
  4. To satisfy the client's invoicing requirements

Explanation

A lift plan systematically identifies hazards, calculates loads and radii, selects the crane configuration and rigging, defines the sequence and nominates competent people and controls. It is a planning document that is briefed to the crew before the lift and reviewed if conditions change.

Question 24Hazard identification, risk assessment and control measures

During a lift, wind speed at the boom tip rises and the load begins to drift. What is the most appropriate immediate action?

  1. Continue and compensate by slewing faster
  2. Stop the lift, lower the load safely and reassess against the crane's wind limits Correct answer.
  3. Ask a dogger to hold the load steady by hand
  4. Extend the boom to gain more height

Explanation

Loads and booms present large sail areas, so wind can cause loss of control, and every crane has manufacturer wind limits for each configuration. If conditions approach or exceed those limits, the lift should be stopped, the load landed safely and the plan reassessed.

Question 25Hazard identification, risk assessment and control measures

Which of these is the best example of a higher-order risk control for crane operations?

  1. Scheduling lifts for quieter times of day
  2. Providing refresher training to doggers
  3. Installing an rated capacity limiter and interlocks on the crane Correct answer.
  4. Displaying warning signs at the site gate

Explanation

Engineering controls built into the plant, such as rated capacity limiters and interlocks, act independently of human behaviour and sit above administrative measures in the hierarchy of control. Training, signage and scheduling rely on people following procedures and are therefore lower-order.

Question 26Hazard identification, risk assessment and control measures

Who has the primary duty to ensure a safe system of work is in place for a crane lift on a construction site?

  1. Only the crane hire company
  2. The person conducting the business or undertaking, in consultation with others Correct answer.
  3. Only the crane operator
  4. Only the dogger directing the lift

Explanation

Work health and safety law places the primary duty on the person conducting the business or undertaking to ensure health and safety so far as reasonably practicable. That duty is discharged through consultation and coordination with the crane supplier, operator, riggers and other duty holders who share responsibility for the lift.

Question 27Hazard identification, risk assessment and control measures

A crane must slew over a pedestrian walkway. Which control is most reliable for protecting people below?

  1. Placing small warning cones at each end of the walkway
  2. Physically excluding people from the area beneath the load path Correct answer.
  3. Relying on workers to look up when they hear the crane
  4. Asking the operator to sound the horn continuously

Explanation

The most reliable protection is to prevent people being under a suspended load at all, by closing or diverting the walkway or providing a physical barrier and controlled exclusion zone. Warning devices and cones are administrative aids that depend on people noticing and complying.

Question 28Hazard identification, risk assessment and control measures

What is the key hazard created when a crane operates on a slope without adequate preparation?

  1. Increased fuel consumption
  2. Faster rope wear on the hoist drum
  3. The crane tipping or the load swinging beyond the planned radius Correct answer.
  4. Reduced load moment due to gravity

Explanation

Operating out of level changes the geometry of the crane, shifting the load moment and reducing stability, and it also causes the load to swing away from the planned position. Manufacturer limits on level and slope must be observed, with a suitably prepared and level standing area.

Question 29Hazard identification, risk assessment and control measures

A load's mass is unknown and the crane's load chart shows capacity close to the estimated mass. What should happen before lifting?

  1. Add a second crane to share the load
  2. Confirm the actual mass by weighing or from verified documentation Correct answer.
  3. Assume the load is lighter because it looks small
  4. Lift slowly and watch the rated capacity limiter

Explanation

Accurate load mass is fundamental to determining whether the lift is within capacity at the required radius, and the mass must be verified rather than estimated. If the mass cannot be confirmed, the lift should not proceed until it is established by weighing or reliable documentation.

Question 30Hazard identification, risk assessment and control measures

Why must a crane's swing area be assessed for crush hazards even when the load itself is clear?

  1. Slewing reduces hydraulic oil pressure
  2. The load chart changes when the crane rotates
  3. The counterweight and rear of the superstructure sweep outside the track or outrigger footprint Correct answer.
  4. The crane's horn is quieter when slewing

Explanation

As the upper structure rotates, the counterweight and rear body sweep through an area larger than the crane's base, creating a crush zone that people may not associate with the load. Barricading or marking this tail-swing radius is essential before slewing begins.

Question 31Hazard identification, risk assessment and control measures

Underground services are suspected where outrigger pads will sit. What is the most appropriate action?

  1. Locate and confirm the services with the asset owner and adjust the setup or use load-spreading measures Correct answer.
  2. Proceed and monitor for ground movement
  3. Ask the operator to watch the ground while lifting
  4. Use larger pads and lift at reduced radius without further checks

Explanation

Buried services can be crushed or ruptured by concentrated outrigger loads, so they must be located and confirmed with the service owner before setup. The crane position or pad arrangement should then be adjusted so loads are spread and services are not damaged.

Question 32Hazard identification, risk assessment and control measures

A dogger proposes guiding a slowly slewing load with one hand to stop it rotating. How should this be managed?

  1. Prohibit it and use taglines or controlled slewing instead Correct answer.
  2. Allow it if the dogger wears gloves
  3. Allow it only during the final metre of descent
  4. Allow it if the load is under 500 kg

Explanation

Contact with a suspended load can pull a person into the crush zone or cause entanglement, so people must not restrain loads by hand. Taglines attached to the load allow control from a safe distance, and the operator controls rotation through smooth slewing.

Question 33Hazard identification, risk assessment and control measures

What is the main risk of operating a crane near an excavation edge?

  1. Loss of ground support causing the crane to overturn or the edge to collapse Correct answer.
  2. The crane's paint fading faster
  3. Increased radio interference
  4. Reduced hydraulic fluid temperature

Explanation

Outrigger loads near an excavation can exceed the capacity of the remaining ground and trigger collapse of the edge, overturning the crane. The setup must be kept back from the edge by a distance determined by a competent person, accounting for the excavation depth and soil conditions.

Question 34Hazard identification, risk assessment and control measures

A crane will lift a load over a site boundary fence onto a public footpath. Which combination best controls the risk to the public?

  1. A traffic management plan with physical exclusion of the public and a planned lift that avoids the footpath where practicable Correct answer.
  2. Timing the lift for lunchtime and relying on the operator's visibility
  3. Increasing the hoist speed to shorten public exposure
  4. A sign on the fence and a verbal warning to passers-by

Explanation

Lifting over public space requires eliminating or minimising exposure, typically by repositioning or rescheduling so the load path avoids the public area, supported by physical exclusion and traffic management. Controls must not rely on the public reading signs or choosing to stay clear.

Question 35Hazard identification, risk assessment and control measures

What should be done if a crane's rated capacity limiter alarms during a lift?

  1. Stop, reduce radius or load, and reassess the lift plan Correct answer.
  2. Ask the dogger to stand on the load to stabilise it
  3. Override the alarm and complete the lift quickly
  4. Continue while the alarm sounds intermittently

Explanation

A capacity limiter alarm indicates the crane is approaching or exceeding its safe working limit for the configuration, so movement should stop and the cause addressed by reducing radius, reducing load or reconfiguring. Alarms and limiters must never be overridden to complete a lift.

Question 36Hazard identification, risk assessment and control measures

Which factor most directly determines the size of the exclusion zone beneath a suspended load?

  1. The number of spare hard hats on site
  2. The potential for the load or rigging to fall and the distance it could travel or swing Correct answer.
  3. The colour of the crane
  4. The crane's registration expiry date

Explanation

The exclusion zone should be based on the consequence of failure, including where the load or rigging could fall, swing or be dropped, plus the crane's tail swing. This ensures people are kept outside the area where they could be struck.

Question 37Hazard identification, risk assessment and control measures

A crane is to be used in a confined yard with walls on three sides. What hazard most needs analysis before the lift?

  1. Wind tunnelling and restricted boom or load movement leading to collision with structures Correct answer.
  2. Reduced engine oil life
  3. Higher radio volume
  4. Increased tyre pressure

Explanation

Enclosed spaces can funnel wind and limit the available slew and boom paths, increasing the chance of collision with walls or structures and making load control harder. The lift plan must consider the actual geometry, wind behaviour and any need for a different crane or position.

Question 38Hazard identification, risk assessment and control measures

Which action best manages the risk of crane collision when two cranes work on the same site?

  1. Assigning each crane a separate colour of paint
  2. Coordinating positions, slew zones and lift sequences in a shared plan with clear communication Correct answer.
  3. Allowing each crew to work independently to save time
  4. Requiring both operators to sound the horn at all times

Explanation

Multiple cranes create collision and dropped-load risks that must be managed through coordinated planning of positions, operating radii, slew zones and sequence, plus agreed communication between crews. Independent working without coordination removes the very controls needed to prevent contact.

Question 39Hazard identification, risk assessment and control measures

A load is to be lifted from a truck parked on a slope. Analysis shows the crane is within capacity but the load may swing as it clears the truck. What is the best control?

  1. Reduce the crane's counterweight
  2. Ask the truck driver to steady the load from the tray
  3. Use taglines and a planned path with the truck repositioned or levelled where practicable Correct answer.
  4. Lift rapidly to clear the truck before swing develops

Explanation

Swing arises when the load is lifted out of vertical alignment with the boom, so the best approach is to reduce that misalignment by repositioning or levelling the truck and to control residual movement with taglines. Rapid lifting increases dynamic loads and swing rather than reducing it.

Question 40Hazard identification, risk assessment and control measures

A crane's load chart capacity at the required radius is 8.0 t. The load mass is 7.2 t, the rigging is 0.5 t and the hook block is included in the chart. What is the most accurate assessment?

  1. The lift is acceptable only if the wind is below 20 knots
  2. The total load is 7.7 t and within capacity, but dynamic and wind effects and the accuracy of the mass should still be considered Correct answer.
  3. The lift is unacceptable because the load exceeds capacity
  4. The lift is acceptable because the load alone is below capacity

Explanation

The load chart accounts for the hook block, so the gross load to compare is the load plus rigging, which totals 7.7 t against 8.0 t. This is within capacity, but the margin is small, so dynamic effects, wind and the reliability of the mass figure must be assessed before proceeding.

Question 41Hazard identification, risk assessment and control measures

A crane must travel with a load suspended on a site with uneven ground. Which analysis is most appropriate?

  1. Travel with a suspended load should be avoided; if unavoidable, it requires manufacturer approval, a prepared level route, reduced capacity and a documented plan Correct answer.
  2. Travel is acceptable if the load is kept low and a dogger walks alongside
  3. Travel is acceptable at full chart capacity if the route is short
  4. Travel is acceptable if the crane's tyres are new

Explanation

Mobile cranes are generally not designed to travel with a freely suspended load, and doing so introduces dynamic loads, swing and ground failure risks. Where no alternative exists, the manufacturer's instructions must permit it and the route, capacity reduction, ground condition and communication must be planned and documented.

Question 42Hazard identification, risk assessment and control measures

A lift plan assumes a radius of 12 m, but the crane is set up so the actual radius is 14 m. What is the primary safety consequence?

  1. The load becomes lighter at a longer radius
  2. The hoist rope becomes stronger
  3. The crane's fuel use increases
  4. The capacity at the greater radius is lower, so the crane may be overloaded even though the load mass is unchanged Correct answer.

Explanation

Load chart capacity falls as radius increases, so a larger radius than planned can reduce capacity below the gross load and overload the crane, even if the load mass has not changed. The actual radius must be measured and confirmed against the chart before lifting.

Question 43Hazard identification, risk assessment and control measures

Which approach best demonstrates consultation in managing crane risks on a site?

  1. Involving the crane operator, riggers and affected workers in identifying hazards and reviewing controls before the lift Correct answer.
  2. Relying on the operator's experience without written procedures
  3. Issuing the lift plan by email after the lift is complete
  4. Leaving risk assessment to the crane hire company alone

Explanation

Consultation requires relevant workers and duty holders to be involved in identifying hazards and deciding controls while the work is being planned, because they hold practical knowledge of the task and site. It also builds understanding of the plan and improves compliance.

Question 44Hazard identification, risk assessment and control measures

A crane is working near a hospital where noise and vibration limits apply. Which control best addresses both the community and worker risk?

  1. Planning quieter equipment and timing, and monitoring exposure against the applicable limits Correct answer.
  2. Ignoring the limits because the lift is short
  3. Removing hearing protection so workers can hear instructions
  4. Running the engine at high idle throughout to shorten the job

Explanation

Where noise and vibration limits apply, the lift should be planned around compliant equipment and timing, with monitoring to confirm exposure stays within the limits. This protects nearby sensitive receivers and the workforce at the same time.

Question 45Crane types, terminology, capacity and configuration

On a slewing mobile crane, what does the term "slew" describe?

  1. Raising and lowering the boom
  2. Travel of the crane on its wheels
  3. Telescoping the boom section
  4. Rotation of the upper structure about the vertical axis Correct answer.

Explanation

Slewing is the rotation of the crane's superstructure around its vertical centre pin while the carrier or base stays put. Hoisting, booming and telescoping are separate motions controlled independently of slew.

Question 46Crane types, terminology, capacity and configuration

A crane is rated 20 tonnes maximum capacity. What does this figure represent?

  1. The heaviest load the crane can lift in any configuration
  2. The capacity with outriggers fully extended on any surface
  3. The load that can be lifted only at the shortest radius with the boom fully retracted Correct answer.
  4. The combined mass of load, hook block and rigging at all radii

Explanation

Rated capacity is the maximum load achievable under the most favourable configuration, usually minimum radius with the boom short. As radius increases or boom lengthens, allowable load falls below this figure.

Question 47Crane types, terminology, capacity and configuration

Which document must be consulted to find the allowable load for a specific boom length and radius?

  1. The load chart for that crane model and configuration Correct answer.
  2. The crane's service logbook
  3. The site traffic management plan
  4. The operator's licence card

Explanation

The load chart gives rated capacities for each combination of radius, boom length and configuration. It is the controlling reference for planning any lift.

Question 48Crane types, terminology, capacity and configuration

What is the "radius" of a lift measured to on a slewing mobile crane?

  1. The vertical height of the boom tip above ground
  2. The horizontal distance from the slewing centre to the centre of the hook or load Correct answer.
  3. The length of the boom from foot pin to head
  4. The distance between the front and rear outriggers

Explanation

Radius is the horizontal distance from the crane's rotation centre to the vertical line through the hook or load. It is measured with the boom positioned as it will be during the lift.

Question 49Crane types, terminology, capacity and configuration

What is the purpose of outriggers on a slewing mobile crane?

  1. To spread the crane's load over a wider area and provide a stable base Correct answer.
  2. To increase travel speed on site roads
  3. To raise the crane so the wheels can be removed
  4. To allow the crane to lift loads while travelling

Explanation

Outriggers extend the machine's support base so the reaction forces are spread across a larger ground area, improving stability during lifting. Their use is assumed in most load chart ratings.

Question 50Crane types, terminology, capacity and configuration

Which of these best describes a "fly jib" or "jib extension"?

  1. An auxiliary lattice section fitted to the boom tip to extend reach Correct answer.
  2. A counterweight block added to the rear of the superstructure
  3. A pad fitted under an outrigger float
  4. A hydraulic ram that raises the boom

Explanation

A fly jib is an auxiliary section attached to the main boom head to gain extra reach or height at reduced capacity. Its use changes the load chart that must be applied.