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High Risk Work Licence - Reach Stacker (RS) study materials
High Risk Work Licence - Reach Stacker (RS) study resources

High Risk Work Licence - Reach Stacker (RS) practice questions

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Question 1Legislation, standards and duty of care for reach stacker operations

Under the model WHS Act, what is the primary duty of a person conducting a business or undertaking (PCBU) in relation to reach stacker operations?

  1. Transfer all safety responsibility to the machine manufacturer
  2. Guarantee that no incident can ever occur on the site
  3. Ensure the health and safety of workers and others affected by the business, so far as is reasonably practicable Correct answer.
  4. Provide personal protective equipment only when workers ask for it

Explanation

The primary duty requires a PCBU to ensure health and safety so far as is reasonably practicable, which is a risk-based standard rather than an absolute guarantee. It extends to workers and other persons affected by the business.

Question 2Legislation, standards and duty of care for reach stacker operations

A reach stacker operator notices a hydraulic leak developing during a shift. Under the model WHS Act, what is the operator's duty as a worker?

  1. Continue working until the leak becomes a failure
  2. Repair the hydraulic system personally before reporting it
  3. Say nothing because hazard reporting is the supervisor's role alone
  4. Take reasonable care for their own health and safety and that of others, and report the hazard Correct answer.

Explanation

Workers must take reasonable care for their own safety and that of others, and must cooperate with the PCBU's safety arrangements, which includes reporting hazards. They are not required to personally repair equipment.

Question 3Legislation, standards and duty of care for reach stacker operations

Which document sets out the legally binding obligations for safe operation of plant such as a reach stacker in the model WHS Regulations?

  1. The site's social club newsletter
  2. The WHS Regulations and the relevant plant and hazardous work codes of practice Correct answer.
  3. The manufacturer's marketing brochure
  4. The operator's personal notes from training

Explanation

The WHS Regulations impose binding duties for plant, and approved codes of practice provide practical guidance on how to comply. Other documents may inform but are not the legal source of obligation.

Question 4Legislation, standards and duty of care for reach stacker operations

In the hierarchy of control, which measure ranks highest for managing reach stacker hazards?

  1. Placing warning signs around the work area
  2. Eliminating the hazard, for example by removing the need to move the load Correct answer.
  3. Using administrative controls such as rotation of operators
  4. Issuing high-visibility clothing to pedestrians

Explanation

The hierarchy of control ranks elimination of the hazard as the most effective measure, followed by substitution, engineering controls, administrative controls and PPE. Administrative controls, signage and PPE sit lower in the hierarchy.

Question 5Legislation, standards and duty of care for reach stacker operations

What does 'reasonably practicable' mean when deciding what control measures to apply to reach stacker work?

  1. Weighing the likelihood and severity of harm against the cost and effort of available controls Correct answer.
  2. Doing whatever is cheapest on the day
  3. Applying only controls that workers agree to
  4. Following whatever a competitor site does

Explanation

Reasonably practicable involves weighing the likelihood and degree of harm against the availability, suitability and cost of controls, among other factors. It is not a simple cost or popularity test.

Question 6Legislation, standards and duty of care for reach stacker operations

A reach stacker is being used to load containers in a yard. Who is responsible for ensuring a safe system of work is in place for that task?

  1. The container owner overseas
  2. The local council
  3. The truck driver waiting at the gate
  4. The PCBU conducting the business or undertaking Correct answer.

Explanation

The PCBU conducting the business or undertaking must establish and maintain a safe system of work for the tasks it controls. Other parties may have duties but do not replace the PCBU's primary responsibility.

Question 7Legislation, standards and duty of care for reach stacker operations

What is the main purpose of a Safe Work Method Statement (SWMS) for high risk construction work involving a reach stacker?

  1. To replace the need for operator training
  2. To document the high risk work, the hazards, and the control measures before work begins Correct answer.
  3. To record the operator's lunch breaks
  4. To serve as the machine's service history

Explanation

A SWMS sets out the high risk construction work, the hazards it creates and the control measures to be applied, and work must be carried out in accordance with it. It does not substitute for training or maintenance records.

Question 8Legislation, standards and duty of care for reach stacker operations

What is the role of a code of practice approved under WHS legislation?

  1. It overrides the WHS Act where they conflict
  2. It only applies to office workers
  3. It provides practical guidance on how to meet the legal duties, and may be used as evidence of what is known about a hazard Correct answer.
  4. It is optional advice with no legal relevance at all

Explanation

Approved codes of practice give practical guidance on achieving the standard required by the legislation and can be used in proceedings as evidence of what is known about a hazard, risk or control. They do not override the Act.

Question 9Legislation, standards and duty of care for reach stacker operations

A reach stacker operator is asked to lift a load that exceeds the machine's rated capacity for the current boom and configuration. What is the correct response under the duty of care?

  1. Refuse the lift and report the unsafe instruction Correct answer.
  2. Ask a workmate to stand on the rear as counterweight
  3. Attempt the lift slowly to see if it works
  4. Proceed but keep the load low

Explanation

Operating beyond rated capacity is unsafe and breaches the duty to take reasonable care. The operator should refuse the unsafe task and escalate it so the lift can be planned within capacity.

Question 10Legislation, standards and duty of care for reach stacker operations

Which of the following best describes the duty of a person who designs, manufactures or supplies a reach stacker?

  1. Only ensure the machine looks presentable on delivery
  2. Ensure the plant is designed and constructed to be safe and without risks to health when used for its intended purpose Correct answer.
  3. Rely entirely on the end user to fix design faults
  4. Provide no information about the machine's limitations

Explanation

Designers, manufacturers, importers and suppliers have duties to ensure plant is safe when used as intended, and to provide information such as safe operating limits. These duties exist alongside the end user's duties.

Question 11Legislation, standards and duty of care for reach stacker operations

What does 'consultation' require of a PCBU when making decisions about reach stacker safety, such as changes to traffic management?

  1. Telling workers about the decision only after it is fully implemented
  2. Consulting only external regulators
  3. Holding a vote that the majority must win
  4. Sharing information, giving workers a reasonable opportunity to express views, and taking those views into account Correct answer.

Explanation

Consultation under WHS law requires sharing relevant information, giving workers a reasonable opportunity to express views and contribute, and taking those views into account. It is not merely informing workers after the fact.

Question 12Legislation, standards and duty of care for reach stacker operations

A reach stacker is fitted with a load moment or overload warning system. What is the operator's legal and safety obligation regarding this device?

  1. Not to disable or bypass it, and to act on its warnings Correct answer.
  2. To ignore it if the operator feels confident
  3. To switch it off when it becomes noisy
  4. To test it by deliberately overloading the machine

Explanation

Safety devices are engineering controls that must be kept functional; disabling or bypassing them removes a critical protection. Operators must respond to warnings and stop unsafe operations.

Question 13Legislation, standards and duty of care for reach stacker operations

What is the purpose of a plant registration or design registration requirement for certain items of plant under WHS Regulations?

  1. To replace the need for daily pre-start checks
  2. To have the plant's design or item assessed against safety requirements before use Correct answer.
  3. To register the operator's driver licence
  4. To record the machine's resale value

Explanation

Registration requirements ensure certain plant designs or items are assessed for compliance with safety requirements before being used. Registration does not replace operational checks or operator licensing.

Question 14Legislation, standards and duty of care for reach stacker operations

An incident occurs where a reach stacker contacts an overhead powerline. Which statement best reflects the notifiable incident obligations under the model WHS Act?

  1. Only the operator must notify the regulator
  2. No notification is needed if no one was injured
  3. The PCBU may wait until the end of the month to report it
  4. The PCBU must notify the regulator immediately and preserve the site so far as is reasonably practicable Correct answer.

Explanation

Certain incidents, including dangerous electrical events and serious incidents, are notifiable. The PCBU must notify the regulator as soon as it becomes aware and preserve the site until the regulator permits otherwise, so far as reasonably practicable.

Question 15Legislation, standards and duty of care for reach stacker operations

Which situation would most clearly require the PCBU to review and revise its risk control measures for reach stacker operations?

  1. When the weather is sunny
  2. After a near miss where a pedestrian was almost struck in the container yard Correct answer.
  3. When the operator's shift roster is unchanged
  4. When a new brand of coffee is supplied in the crib room

Explanation

Control measures must be reviewed when there is evidence they are not effective, such as a near miss, or when circumstances change. A near miss with a pedestrian indicates the traffic management controls need review.

Question 16Legislation, standards and duty of care for reach stacker operations

An operator is pressured by a supervisor to move a container with a damaged sling and no certified lifting points. How should the operator apply the hierarchy of control and duty of care?

  1. Use the damaged sling but keep people away
  2. Stop the task, escalate the unsafe instruction, and use only certified lifting equipment and points Correct answer.
  3. Tie the container with rope as a substitute for certified points
  4. Proceed because the supervisor gave the instruction

Explanation

The duty to take reasonable care requires stopping unsafe work and escalating it, and loads must be secured using certified equipment and lifting points. A supervisor's instruction does not make an unsafe method lawful.

Question 17Legislation, standards and duty of care for reach stacker operations

Which statement best explains the relationship between the WHS Act, the WHS Regulations and approved codes of practice?

  1. Codes override the Regulations where they differ
  2. Codes and Regulations are identical in legal status
  3. The Regulations override the Act where they differ
  4. The Act sets overarching duties, the Regulations prescribe specific requirements, and codes give practical guidance Correct answer.

Explanation

The Act establishes overarching duties, the Regulations set out specific legally binding requirements, and approved codes of practice provide practical guidance on compliance. The Act prevails over the Regulations, and codes do not override either.

Question 18Legislation, standards and duty of care for reach stacker operations

What is the general rule about an operator's high risk work licence when operating a reach stacker?

  1. A first aid certificate is sufficient
  2. A car driver licence is sufficient
  3. The operator must hold the appropriate current high risk work licence for that class of plant Correct answer.
  4. Any person may operate it if supervised by a licensed operator

Explanation

Reach stacker operation is high risk work and requires the operator to hold the appropriate current high risk work licence for that plant class. Supervision by a licensed operator does not replace the licence requirement for the person operating.

Question 19Legislation, standards and duty of care for reach stacker operations

Under the model WHS Act, what does the term 'officer' require of a company director in relation to reach stacker safety?

  1. Exercise due diligence to ensure the PCBU complies with its WHS duties Correct answer.
  2. Only review safety after an incident occurs
  3. Delegate all WHS matters to the newest employee
  4. Personally operate the reach stacker each shift

Explanation

Officers must exercise due diligence to ensure the PCBU meets its WHS obligations, which includes understanding hazards and ensuring resources and processes are in place. This is an ongoing duty.

Question 20Legislation, standards and duty of care for reach stacker operations

Which of the following is the best example of applying the hierarchy of control to pedestrian separation around a reach stacker?

  1. Installing physical barriers to separate pedestrians from the operating area Correct answer.
  2. Putting up a sign asking pedestrians to be careful
  3. Adding a mirror to the machine and relying on the operator to watch for people
  4. Telling pedestrians to wear high-visibility vests

Explanation

Physical barriers are an engineering control that isolates people from the hazard and ranks higher than administrative controls or PPE. Mirrors, signs and vests are lower-order controls.

Question 21Hazard identification, risk assessment and control

Before operating a reach stacker, which document should be checked to confirm the machine is safe and legally in service?

  1. The operator's driver licence
  2. The site lunchroom roster
  3. The manufacturer's sales brochure
  4. The current pre-operational inspection and maintenance records Correct answer.

Explanation

Pre-operational inspection and maintenance records confirm the machine has been checked and is in a safe, serviceable condition. They also demonstrate the plant has been maintained as required by work health and safety duties.

Question 22Hazard identification, risk assessment and control

A reach stacker operator notices a hydraulic oil leak under the machine during the pre-start check. What is the most appropriate first action?

  1. Report the defect and take the machine out of service until repaired Correct answer.
  2. Wipe the oil away and begin work
  3. Reduce lifting loads by half and keep operating
  4. Top up the oil and continue the shift

Explanation

A hydraulic leak is a defect that can lead to loss of lifting control or a slip hazard, so the machine must be reported and isolated until it is repaired. Continuing to operate with a known defect breaches the duty to work safely.

Question 23Hazard identification, risk assessment and control

What is the purpose of a hazard identification process on a container handling site?

  1. To assign blame after an incident
  2. To find and record things that could cause harm before they do Correct answer.
  3. To satisfy paperwork requirements only
  4. To calculate the cost of new equipment

Explanation

Hazard identification is a proactive process that finds sources of potential harm so they can be assessed and controlled. It is a core part of the risk management cycle, not a post-incident or administrative exercise.

Question 24Hazard identification, risk assessment and control

In the hierarchy of control, which measure is the highest and most reliable level of control?

  1. Engineering controls such as interlocks
  2. Administrative controls
  3. Personal protective equipment
  4. Eliminating the hazard Correct answer.

Explanation

The hierarchy of control ranks elimination of the hazard as the most effective measure because the risk is removed entirely. Lower levels such as engineering, administrative controls and PPE rely on ongoing human behaviour or barriers.

Question 25Hazard identification, risk assessment and control

Which of the following is a common hazard specific to reach stacker operations in a container yard?

  1. Swinging rear counterweight striking nearby people or structures Correct answer.
  2. Poor lighting in the site office
  3. Insufficient car parking for visitors
  4. Noise from the staff canteen

Explanation

A reach stacker has a large rear counterweight and a wide turning circle, so the rear swing can strike pedestrians or structures during manoeuvring. This is a recognised machine-specific hazard in container yards.

Question 26Hazard identification, risk assessment and control

When should a pre-operational inspection of a reach stacker be carried out?

  1. Once a month by the maintenance team
  2. Only when the machine changes sites
  3. Only after a fault is reported
  4. At the start of each shift before use Correct answer.

Explanation

Pre-operational checks are performed at the start of each shift so defects are found before the machine is used. Regular daily checks catch problems early and confirm the machine is safe to operate.

Question 27Hazard identification, risk assessment and control

What does a risk assessment combine to determine the level of risk?

  1. The cost of the load and the delivery schedule
  2. The operator's age and years of experience
  3. The likelihood of harm and the severity of that harm Correct answer.
  4. The colour of the machine and the time of day

Explanation

Risk is assessed by considering both how likely an incident is and how serious the resulting harm could be. Together these determine the risk level and the priority for controls.

Question 28Hazard identification, risk assessment and control

A container is being stacked and the operator cannot see pedestrians behind the load. What control best manages this hazard?

  1. Rely on the reversing alarm alone
  2. Sound the horn once and reverse quickly
  3. Ask pedestrians to listen for the engine
  4. Use a spotter or pedestrian exclusion zone and check mirrors and cameras before moving Correct answer.

Explanation

Blind spots around a reach stacker require positive controls such as exclusion zones or a trained spotter, supported by mirrors and cameras. These prevent people from being in the path of the machine.

Question 29Hazard identification, risk assessment and control

Which environmental condition most reduces the stability and braking performance of a reach stacker on a container terminal?

  1. Warm ambient temperature
  2. Low humidity
  3. Bright sunlight
  4. Strong crosswinds and wet, slippery ground Correct answer.

Explanation

High winds can affect a raised container acting like a sail, while wet or slippery surfaces reduce traction and braking. Both directly affect stability and control of the machine.

Question 30Hazard identification, risk assessment and control

A load chart on a reach stacker indicates reduced capacity at a particular boom extension. Why must the operator follow this chart?

  1. It applies only to trained operators
  2. It is only a guide that can be exceeded with care
  3. It is used to calculate fuel consumption
  4. It shows the maximum safe load for that configuration Correct answer.

Explanation

The load chart defines the maximum safe load for each boom length and radius, because capacity decreases as the load is held further out. Exceeding it can overload the machine and cause a tip-over or structural failure.

Question 31Hazard identification, risk assessment and control

During a risk assessment, a hazard is rated as high risk. What should happen next?

  1. Apply controls to reduce the risk before work proceeds Correct answer.
  2. Record it and take no further action
  3. Continue work and review the hazard next year
  4. Wait for an incident to confirm the risk

Explanation

A high-risk rating requires controls to be implemented to reduce the risk to an acceptable level before the task proceeds. Risks cannot simply be recorded and left unmanaged.

Question 32Hazard identification, risk assessment and control

An operator is about to lift a container and notices that the spreader twistlocks do not appear to fully engage. What is the correct action?

  1. Lower the container and re-check engagement before lifting Correct answer.
  2. Ask a colleague to hold the container steady
  3. Lift slowly and watch the container
  4. Increase engine speed to force engagement

Explanation

Incomplete twistlock engagement can allow the container to detach during the lift, causing a serious dropped-load hazard. The load must be set down and engagement confirmed before lifting.

Question 33Hazard identification, risk assessment and control

Which of the following best describes a safe approach to managing fatigue for reach stacker operators?

  1. Skipping breaks to reduce turnaround time
  2. Following rostered breaks and reporting fatigue to the supervisor Correct answer.
  3. Working longer shifts to finish the container backlog
  4. Relying on energy drinks to stay alert

Explanation

Fatigue impairs judgement and reaction time, which is dangerous when operating heavy plant. Rostered breaks and open reporting of fatigue allow the risk to be managed before it causes an incident.

Question 34Hazard identification, risk assessment and control

A new exclusion zone is being set up around a reach stacker working area. What is the main purpose of this zone?

  1. To mark where the machine is refuelled
  2. To reserve parking for the operator
  3. To store empty containers temporarily
  4. To keep pedestrians and other vehicles out of the machine's operating area Correct answer.

Explanation

An exclusion zone physically separates people and other plant from the reach stacker's travel and lifting area, reducing the chance of being struck. It is a key control for pedestrian and vehicle interaction hazards.

Question 35Hazard identification, risk assessment and control

What is the correct way to manage a hazard that cannot be eliminated or engineered out?

  1. Stop all site operations permanently
  2. Ignore it because it is unavoidable
  3. Apply administrative controls and PPE as lower-order measures Correct answer.
  4. Rely only on signage

Explanation

When higher-order controls are not practicable, lower-order measures such as procedures, training and PPE are used to reduce the remaining risk. These should be combined with any engineering controls still possible.

Question 36Hazard identification, risk assessment and control

An operator finds a damaged lifting sling in the rigging store. What should be done with it?

  1. Use it for light loads only
  2. Return it to the rack for someone else to use
  3. Tag it as defective and remove it from service Correct answer.
  4. Cut it up and throw it in general waste without recording

Explanation

Damaged lifting equipment must be quarantined and tagged so it cannot be used, then reported for repair or disposal. Removing it from service prevents a failure that could drop a load.

Question 37Hazard identification, risk assessment and control

Which factor most directly affects the stability of a reach stacker when lifting a container?

  1. The height and radius at which the load is held Correct answer.
  2. The colour of the container
  3. The brand of the machine's tyres
  4. The number of staff on site

Explanation

Stability is affected by the combination of load weight and the height and radius at which it is held, because the centre of gravity shifts outward and upward. Operating within the load chart keeps the machine stable.

Question 38Hazard identification, risk assessment and control

A reach stacker must travel across a container yard at night. Which control best addresses the hazard of poor visibility?

  1. Using working headlights, beacons and reflective markings on pedestrians and plant Correct answer.
  2. Driving faster to reduce time in the dark
  3. Operating without lights to save the battery
  4. Relying on the operator's memory of the yard layout

Explanation

Adequate lighting, beacons and high-visibility markings make the machine and pedestrians visible to each other at night. This reduces the risk of collision in low-light conditions.

Question 39Hazard identification, risk assessment and control

Which of these is an example of an administrative control for reach stacker operations?

  1. A reversing camera fitted to the machine
  2. A documented traffic management plan and operator training Correct answer.
  3. A physical barrier between pedestrians and the machine
  4. An automatic overload sensor

Explanation

Administrative controls change how work is organised, such as traffic management plans, procedures and training. They rely on people following them and rank below engineering controls.

Question 40Hazard identification, risk assessment and control

An operator is asked to lift a container whose weight is not marked and cannot be confirmed. What is the safest course of action?

  1. Ask a bystander to guess the weight
  2. Estimate the weight and lift if it looks light
  3. Do not lift until the weight is confirmed and checked against the load chart Correct answer.
  4. Lift it slightly and judge by feel

Explanation

Unknown weight means the operator cannot confirm the lift is within the machine's capacity, risking overload and tip-over. The load must not be lifted until its weight is verified against the load chart.

Question 41Hazard identification, risk assessment and control

Two hazards are identified: a high-likelihood minor hazard and a low-likelihood fatality hazard. How should risk assessment treat these?

  1. Both must be assessed on likelihood and severity and controlled accordingly Correct answer.
  2. Only the fatality hazard needs controls
  3. Neither needs action until an incident occurs
  4. Only the high-likelihood hazard needs controls

Explanation

Risk assessment considers both likelihood and severity, so a low-likelihood hazard with fatal consequences can still be high risk. Both hazards must be assessed and controlled, with priority given to the highest overall risk.

Question 42Hazard identification, risk assessment and control

A reach stacker is working near overhead powerlines. Which control sequence best reflects the hierarchy of control?

  1. Erect physical barriers and goalposts, then add signage and a spotter as backup Correct answer.
  2. Rely on the operator to watch the lines
  3. Instruct workers to duck when the boom rises
  4. Post a warning sign and proceed

Explanation

Engineering controls such as barriers and goalposts physically prevent contact with powerlines and rank above administrative measures. Signage and a spotter provide additional lower-order backup.

Question 43Hazard identification, risk assessment and control

An incident occurs when a container is dropped during a lift. What is the primary purpose of the subsequent investigation?

  1. To calculate insurance payouts
  2. To complete the shift report
  3. To identify root causes and prevent recurrence Correct answer.
  4. To determine who to dismiss

Explanation

Incident investigation aims to find the underlying causes so controls can be improved and the incident prevented from happening again. It is a learning and prevention process, not a blame exercise.

Question 44Hazard identification, risk assessment and control

A reach stacker's load moment indicator alarms during a lift. What does this signal and what should the operator do?

  1. The alarm is a false signal and can be ignored
  2. The machine is low on fuel and should continue
  3. The load is approaching or exceeding safe capacity and the lift should be stopped and reassessed Correct answer.
  4. The container is too light and should be replaced

Explanation

A load moment indicator warns when the load is approaching or exceeding the machine's safe capacity for the current configuration. The operator must stop, lower the load and reassess the lift within the load chart.

Question 45Reach stacker components, stability and load charts

On a reach stacker load chart, what does the rated capacity at a given boom extension and height represent?

  1. The load that causes the machine to tip regardless of tyre pressure
  2. The average load moved during a normal shift
  3. The maximum load the machine can lift in that configuration under stated conditions Correct answer.
  4. The weight of the attachment plus the spreader only

Explanation

A load chart states the rated capacity for each combination of boom extension, boom angle or height, and sometimes attachment type. It is the maximum permitted load for that configuration when the machine is on suitable ground and operated as specified. Exceeding it reduces the stability margin or overloads a structural component.

Question 46Reach stacker components, stability and load charts

Why does a reach stacker's rated capacity decrease as the boom is extended further forward?

  1. The load moment about the front axle increases Correct answer.
  2. The spreader becomes heavier when extended
  3. The hydraulic oil heats up and loses pressure
  4. Engine power available at the wheels drops

Explanation

Capacity is limited largely by the overturning moment the load creates about the machine's forward tipping line. Extending the boom forward increases the horizontal distance from that line, so the same load produces a larger moment. The chart therefore reduces capacity at longer reach.

Question 47Reach stacker components, stability and load charts

What is the purpose of the reach stacker's load moment or overload indicator system?

  1. To record engine hours for servicing
  2. To automatically level the machine on sloping ground
  3. To warn the operator and inhibit unsafe movements when the rated capacity is approached or exceeded Correct answer.
  4. To weigh each container for shipping documentation

Explanation

Load moment systems compare the actual load and geometry against the rated capacity and provide a warning, and typically cut out hazardous movements, before the limit is exceeded. They are a safety device that backs up the operator's use of the load chart. They do not replace correct judgement or the chart itself.

Question 48Reach stacker components, stability and load charts

A reach stacker is rated to lift a load at a given reach only when the machine is level. What is the main reason for this requirement?

  1. The load chart only applies on concrete surfaces
  2. Tipping margins are calculated for a level machine, and slope reduces the margin on the downhill side Correct answer.
  3. Hydraulic oil flows better on level ground
  4. Level ground reduces tyre wear

Explanation

Stability calculations assume the machine sits level, so the tipping line is symmetrically placed relative to the load. On a slope the effective margin on the downhill side is reduced and the load moment acts closer to the tipping line. Working out of level therefore reduces safe capacity below the chart value.

Question 49Reach stacker components, stability and load charts

What does the term 'rated capacity' exclude on a reach stacker load chart?

  1. The weight of the container being handled
  2. The combined weight of container and cargo
  3. The weight of the cargo inside the container
  4. The weight of the spreader or attachment where the chart states capacity is net of it Correct answer.

Explanation

Charts usually state whether the figures are gross (including attachment) or net of the attachment. Where capacity is quoted net, the attachment weight must be added back when checking the actual load. Container and cargo weights are always part of the load to be assessed.

Question 50Reach stacker components, stability and load charts

Which component transfers the lifting load from the boom to the machine's chassis and counterweight structure?

  1. The exhaust after-treatment unit
  2. The boom pivot and frame Correct answer.
  3. The steering axle
  4. The spreader twistlocks

Explanation

The boom is mounted on a pivot on the superstructure or chassis frame, and that frame carries the load into the counterweight and axles. Twistlocks secure the container to the spreader but do not carry load into the chassis. Understanding the load path helps explain why structural limits and stability limits both apply.