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High Risk Work Licence - Bridge and Gantry Crane (CB) study materials
High Risk Work Licence - Bridge and Gantry Crane (CB) study resources

High Risk Work Licence - Bridge and Gantry Crane (CB) practice questions

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Question 1Work health and safety legislation, duty of care and licensing requirements

Under the model Work Health and Safety Act, what is the primary duty of a person conducting a business or undertaking (PCBU) that operates a bridge crane in a workplace?

  1. To report every crane lift to the regulator before work begins
  2. To ensure the crane is inspected once every five years by the manufacturer
  3. To provide workers with personal protective equipment before any other control
  4. To eliminate risks to health and safety so far as is reasonably practicable Correct answer.

Explanation

The primary duty requires a PCBU to ensure the health and safety of workers and others affected by the business, so far as is reasonably practicable. This duty is broad and requires eliminating risks where possible and minimising those that remain through a hierarchy of controls. It is not limited to periodic inspection or paperwork.

Question 2Work health and safety legislation, duty of care and licensing requirements

A worker holds a current CB high risk work licence. Which statement best describes what that licence authorises the worker to do?

  1. Operate any crane, including tower cranes and mobile cranes, without further training
  2. Operate bridge and gantry cranes within the scope of the licence class Correct answer.
  3. Supervise crane operations and sign off lift plans for any crane class
  4. Inspect and certify the structural integrity of bridge cranes

Explanation

A CB licence authorises the holder to operate bridge and gantry cranes, including those controlled from a pendant or cab. It does not extend to other crane classes such as tower or mobile cranes, which have separate licence classes. Supervisory and inspection roles require additional competencies beyond the operating licence.

Question 3Work health and safety legislation, duty of care and licensing requirements

Which of the following is a duty owed by workers under the model Work Health and Safety Act?

  1. To purchase and maintain their own lifting slings
  2. To conduct risk assessments for the PCBU
  3. To design a safe system of work for crane operations
  4. To take reasonable care for their own health and safety and that of others Correct answer.

Explanation

Workers must take reasonable care for their own health and safety and ensure their acts or omissions do not adversely affect others. They must also comply with reasonable instructions and cooperate with safety policies. Designing systems of work and conducting risk assessments are duties of the PCBU.

Question 4Work health and safety legislation, duty of care and licensing requirements

A person arrives at a site and asks to operate a bridge crane for a short lift. They cannot produce a current CB licence. What is the most appropriate response from the site supervisor?

  1. Allow the lift if a licensed operator supervises from the floor
  2. Allow the lift if the load is below half the crane's rated capacity
  3. Allow the lift if the person has more than ten years of experience
  4. Do not allow the person to operate the crane until a valid licence is verified Correct answer.

Explanation

High risk work licences are a legal requirement, and a person must hold the correct licence class before performing the work. Experience, supervision, or load size does not substitute for a valid licence. Allowing unlicensed operation exposes the PCBU and the individual to serious penalties.

Question 5Work health and safety legislation, duty of care and licensing requirements

What is the primary purpose of the high risk work licensing system for crane operators?

  1. To protect the health and safety of people at or near the workplace Correct answer.
  2. To guarantee that crane owners will not be prosecuted after an incident
  3. To set the hourly pay rate for crane operators
  4. To replace the need for workplace risk assessments

Explanation

The licensing system exists to protect health and safety by ensuring people performing high risk work have demonstrated the required competence. It supports, but does not replace, the PCBU's duty to manage risks at the workplace. It has no role in setting pay or granting immunity from prosecution.

Question 6Work health and safety legislation, duty of care and licensing requirements

Under the model Work Health and Safety Regulation, what must a PCBU do regarding the registration of certain items of plant such as bridge cranes?

  1. Register the plant with the regulator if the plant is listed as requiring registration Correct answer.
  2. Register the plant only after an incident occurs
  3. Register the plant with the local council annually
  4. Register the plant with the manufacturer before first use

Explanation

The regulation requires registration of certain items of plant, such as some cranes, with the regulator before use. Registration involves design and item registration depending on the plant type. It is not handled by manufacturers or local councils and is not triggered by incidents.

Question 7Work health and safety legislation, duty of care and licensing requirements

A PCBU is planning to use a bridge crane for a lift near an overhead powerline. Which duty applies first under the hierarchy of risk control?

  1. Provide insulating gloves to the crane operator
  2. Schedule the lift at night when the line is less visible
  3. Eliminate the risk by de-energising or isolating the powerline where practicable Correct answer.
  4. Erect warning signs and rely on the operator's vigilance

Explanation

The hierarchy of control requires eliminating the hazard first where it is reasonably practicable to do so. De-energising or isolating the powerline removes the electrical risk entirely. Administrative controls and personal protective equipment are lower-order controls used only when elimination is not practicable.

Question 8Work health and safety legislation, duty of care and licensing requirements

What does the 'so far as is reasonably practicable' qualifier mean in relation to a PCBU's duty of care?

  1. The PCBU must do what a reasonable person would do, weighing likelihood and severity of harm against the cost and difficulty of control Correct answer.
  2. The PCBU is excused from any duty if a worker is experienced
  3. The PCBU can choose the cheapest option available
  4. The PCBU only needs to act after an incident has occurred

Explanation

Reasonably practicable involves weighing the likelihood and degree of harm against the availability, suitability, and cost of controls. Cost alone is not a defence, but grossly disproportionate cost may be relevant. The test is objective and does not depend on a worker's experience or on an incident having occurred.

Question 9Work health and safety legislation, duty of care and licensing requirements

Which of the following best describes the consultation duty a PCBU owes to workers who operate or work near a bridge crane?

  1. Consultation is required so far as is reasonably practicable when decisions affect work health and safety Correct answer.
  2. Consultation is only required when a serious incident has occurred
  3. Consultation is only required with the crane manufacturer
  4. Consultation is optional and can be replaced by a toolbox talk

Explanation

The model Act requires the PCBU to consult with workers and their representatives about matters that affect their health and safety, so far as is reasonably practicable. Consultation must occur before decisions are made and should be genuine and timely. It is not limited to incidents and cannot be replaced by one-way communication.

Question 10Work health and safety legislation, duty of care and licensing requirements

A crane operator notices that the pendant control has a damaged cable and reports it to the supervisor. The supervisor tells the operator to keep working until the end of the shift. What is the operator's most appropriate action?

  1. Stop operating the crane and refuse to use it until it is repaired and verified safe Correct answer.
  2. Ask another worker to operate the crane instead
  3. Place a warning tag on the crane and continue operating at reduced speed
  4. Continue operating but keep hands away from the damaged section

Explanation

A worker must not operate plant that is unsafe, and has the right to cease unsafe work without disadvantage. The damaged cable is a defect that could cause electric shock or loss of control. The crane should be isolated and tagged out until repaired and inspected.

Question 11Work health and safety legislation, duty of care and licensing requirements

What is the notification obligation of a PCBU when a bridge crane collapse results in a person being seriously injured?

  1. Notify the regulator at the next annual report
  2. Notify the regulator only if the injured person requests it
  3. Notify the regulator immediately after becoming aware of the incident Correct answer.
  4. No notification is required if the crane is insured

Explanation

The model Act requires the PCBU to notify the regulator immediately after becoming aware of a notifiable incident, including serious injury or dangerous occurrences. The site must also be preserved until the regulator permits otherwise. Insurance status and worker requests do not affect the obligation.

Question 12Work health and safety legislation, duty of care and licensing requirements

Which of the following is a duty of a person who installs, erects, or commissions a bridge crane at a workplace?

  1. To operate the crane for the first month of production
  2. To ensure the plant is without risks to health and safety when installed and commissioned Correct answer.
  3. To provide the PCBU with a list of workers to be made redundant
  4. To take out workers compensation insurance for the PCBU's employees

Explanation

A person who installs, constructs, or commissions plant has a duty to ensure, so far as is reasonably practicable, that the plant is without risks when installed or commissioned. This includes compliance with design specifications and safety requirements. Operating the crane or managing the PCBU's employment matters is outside that duty.

Question 13Work health and safety legislation, duty of care and licensing requirements

A person with a CB licence is asked to operate a gantry crane that has been modified with a new control system they have not been trained on. What should happen before they operate it?

  1. They should operate it carefully and learn the controls during the shift
  2. They should receive information, training, and instruction on the new control system and be assessed as competent Correct answer.
  3. They should rely on the manufacturer's manual left in the cab
  4. They should ask a co-worker to press the buttons while they watch

Explanation

A PCBU must provide information, training, and instruction so workers can perform their work safely, and this must be updated when plant or systems change. A licence alone does not cover unfamiliar controls. Competency should be verified before operation.

Question 14Work health and safety legislation, duty of care and licensing requirements

What is the role of a health and safety representative (HSR) in relation to bridge crane operations at a workplace?

  1. To operate the crane when the licensed operator is on leave
  2. To represent workers in consultation and raise safety issues, including requesting a review of control measures Correct answer.
  3. To issue high risk work licences to new operators
  4. To certify the crane's lifting capacity after modifications

Explanation

An HSR represents workers on work health and safety matters and can raise issues, request information, and initiate a review of control measures. They do not take over licensed operation or certification roles. Licences are issued by the regulator, not by HSRs.

Question 15Work health and safety legislation, duty of care and licensing requirements

Which of the following best describes the duty of a PCBU to provide first aid and emergency arrangements for bridge crane operations?

  1. Emergency procedures can be replaced by a verbal instruction to call the site manager
  2. First aid arrangements are only required if the crane exceeds ten tonnes capacity
  3. The PCBU must provide adequate first aid and emergency procedures appropriate to the risks of the workplace Correct answer.
  4. First aid is the sole responsibility of the crane operator

Explanation

The PCBU must provide adequate first aid equipment, facilities, and trained personnel, and emergency procedures appropriate to the nature of the work and the risks. The requirement applies regardless of crane capacity. It is a PCBU duty, not one transferred to the operator.

Question 16Work health and safety legislation, duty of care and licensing requirements

A PCBU uses a bridge crane for a routine lift. Which statement best reflects the PCBU's duty regarding the crane's maintenance?

  1. Maintenance can be deferred indefinitely if the crane is lightly used
  2. Maintenance is only required after a breakdown occurs
  3. The PCBU must ensure the crane is maintained in a safe condition, including inspection and repair by competent persons Correct answer.
  4. Maintenance is the operator's personal responsibility and can be done during breaks

Explanation

The PCBU must ensure plant is maintained in a safe condition and inspected and repaired by competent persons at appropriate intervals. Maintenance is proactive and cannot wait for breakdowns. Operators may perform pre-start checks but are not responsible for structural maintenance.

Question 17Work health and safety legislation, duty of care and licensing requirements

Which of the following is an example of a 'reasonably practicable' control for managing the risk of a suspended load falling during a bridge crane lift?

  1. Increasing the crane's speed to reduce exposure time
  2. Asking workers to stand clear only when they hear the crane alarm
  3. Relying on the operator to work slowly
  4. Using certified lifting gear and a documented lift plan with exclusion zones Correct answer.

Explanation

Certified lifting gear and a documented lift plan with exclusion zones are higher-order controls that reduce the likelihood and consequences of a falling load. Relying on operator behaviour or alarms alone is less reliable. Increasing speed increases risk rather than controlling it.

Question 18Work health and safety legislation, duty of care and licensing requirements

A PCBU is considering whether to require a CB licence for a worker who operates a bridge crane only via remote control from a safe distance. What is the correct position?

  1. A CB licence is required because the work is still bridge and gantry crane operation Correct answer.
  2. A licence is only required if the crane is registered
  3. Remote operation is exempt from licensing because the operator is not in the cab
  4. A licence is only required if the remote control is wired

Explanation

The CB licence class covers bridge and gantry crane operation regardless of whether the crane is controlled from a cab, pendant, or remote. The licensing requirement is based on the type of plant and work, not the control method. Registration status does not change the operator licensing requirement.

Question 19Work health and safety legislation, duty of care and licensing requirements

An incident occurs where a bridge crane drops a load and narrowly misses a worker. No one is injured. What is the PCBU's obligation?

  1. Report the event to the crane manufacturer only
  2. No action is required because no one was injured
  3. Only record the event in the crane maintenance log
  4. Notify the regulator if the incident is a dangerous occurrence under the regulation and preserve the site Correct answer.

Explanation

Notifiable incidents include dangerous occurrences, such as a load dropping that could have caused serious harm, even without injury. The PCBU must notify the regulator and preserve the site. Recording in a maintenance log or notifying the manufacturer does not satisfy the legal obligation.

Question 20Work health and safety legislation, duty of care and licensing requirements

A PCBU proposes to have an unlicensed worker operate a bridge crane under the direct supervision of a licensed operator for training purposes. Which statement is correct?

  1. This is not permitted because the worker must hold a CB licence to operate the crane Correct answer.
  2. This is permitted if the worker has completed an online induction
  3. This is permitted because the licensed operator is present at all times
  4. This is permitted only if the load is under one tonne

Explanation

High risk work must be performed by a person who holds the relevant licence, and supervision does not remove that requirement. Training may occur only under arrangements that comply with the licensing framework, such as an approved training program with a licensed trainer. Load weight and online induction do not create an exemption.

Question 21Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Before a bridge crane lifts a load over a walkway, which control is the most reliable way to protect people who may pass underneath?

  1. Sound the crane horn continuously throughout the lift
  2. Reduce the hoist speed to the slowest available setting
  3. Place barricades and signage to close the walkway to pedestrians Correct answer.
  4. Ask the dogman to wave people away during the lift

Explanation

The hierarchy of risk control places physical isolation above administrative measures. Closing the walkway with barricades removes the exposure entirely, whereas warnings and slow speeds only reduce the chance of contact. People who are not part of the lift should never be permitted under a suspended load.

Question 22Hazard identification, risk assessment and risk control for bridge and gantry crane operations

What is the primary purpose of a risk assessment before starting a crane lift?

  1. To transfer legal responsibility from the operator to the dogman
  2. To create a record that satisfies the regulator after an incident
  3. To identify hazards and decide controls before work begins Correct answer.
  4. To calculate the exact cycle time for the planned lifts

Explanation

A risk assessment is a proactive process: hazards are identified, their likelihood and consequence are evaluated, and controls are selected and recorded before the task starts. Documentation is a by-product, not the purpose, and duty holders cannot contract out their obligations to another worker.

Question 23Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A gantry crane runs on rails in an open yard where workers also walk. Which control best addresses the risk of a person being struck by the travelling crane?

  1. Requiring workers to listen for the travel alarm
  2. Painting the crane legs in a bright colour
  3. Installing marked pedestrian crossings with physical barriers around the rails Correct answer.
  4. Limiting crane travel speed to half of maximum

Explanation

Separating pedestrians from the crane travel path by engineering means is the highest-order control available for this hazard. Marked crossings with barriers keep people out of the crush zone and define a safe route. Colour and alarms are warnings only, and speed limits reduce but do not remove exposure.

Question 24Hazard identification, risk assessment and risk control for bridge and gantry crane operations

When is it acceptable for a crane operator to lift a load over a person?

  1. When the area beneath the load has been fully evacuated Correct answer.
  2. When the lift is short and the load is light
  3. When the dogman has signalled that it is clear
  4. When the person is wearing a hard hat and high-visibility clothing

Explanation

A suspended load must never pass over a person, because the load or rigging can fail without warning and no PPE protects against a falling load. The only acceptable condition is that nobody is beneath the load or in the drop zone. Light loads and short lifts do not remove the hazard.

Question 25Hazard identification, risk assessment and risk control for bridge and gantry crane operations

During a site inspection you find the crane's rated capacity plate is missing and the load chart cannot be located. What is the correct response?

  1. Proceed only if the load is below half of the estimated capacity
  2. Stop the lift and take the crane out of service until capacity information is restored Correct answer.
  3. Estimate capacity from the crane's physical size and proceed
  4. Continue working at reduced capacity until the plate is replaced

Explanation

Without rated capacity information the operator cannot know the safe working load for any configuration, so the crane cannot be operated safely. The hazard is uncontrolled and the crane must be withdrawn from service until the information is restored. Guessing capacity from appearance or halving an estimate is unsafe.

Question 26Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Which factor most directly increases the risk of a bridge crane overturning or derailing on its runway?

  1. Travelling with a load that is slewed or dragged sideways Correct answer.
  2. Using a hook with a functioning safety latch
  3. Operating the hoist at its slowest speed
  4. Parking the crane at the end of the runway after use

Explanation

Side pull or slewing while travelling generates lateral forces the runway and wheel flanges are not designed to resist, which can derail the crane or damage the structure. Normal hoisting, a functioning hook latch and correct parking do not create such forces.

Question 27Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A load is rigged with a sling that shows a deep cut through several outer wires of the rope. What should happen before the lift?

  1. The cut may be taped over so the damage is not visible
  2. The sling is acceptable if it is the only one available
  3. The sling is tagged out and removed from service Correct answer.
  4. The sling may be used if the load is reduced by 25 percent

Explanation

Visible wire breaks, cuts and kinks are rejection criteria for slings because the remaining strength is unknown. Damaged rigging must be quarantined and removed from service. Reducing the load or hiding the defect does not restore the sling's integrity.

Question 28Hazard identification, risk assessment and risk control for bridge and gantry crane operations

When planning a lift near overhead powerlines, what is the most effective control?

  1. Erecting goalposts and tiger tails as a visual guide only
  2. Instructing the operator to watch the lines carefully
  3. Restricting lifts near the lines to daylight hours
  4. De-energising and isolating the lines, or maintaining the regulated exclusion distance Correct answer.

Explanation

Electric shock from contact or arcing is a high-consequence hazard, so the preferred control is to have the lines de-energised and isolated, or to keep the crane and load outside the regulated exclusion zone. Visual markers and instructions are lower-order controls that rely on human behaviour.

Question 29Hazard identification, risk assessment and risk control for bridge and gantry crane operations

What is the main hazard created by wind acting on a large, flat load suspended from a bridge crane?

  1. Increased hoist brake wear
  2. Faster trolley travel speed
  3. Reduced hydraulic oil temperature
  4. Loss of load control causing swinging and possible contact with structures Correct answer.

Explanation

Large surface areas act like sails, so wind can swing or rotate the load and push it into people or structures. Load control is lost and the resulting dynamic forces can also overload rigging. Brake wear and oil temperature are not the primary risk.

Question 30Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A crane operator notices the travel limit switch on the long-travel motion has been bypassed. What is the appropriate action?

  1. Reset the bypass only when a load is suspended
  2. Continue working and note the defect at the end of the shift
  3. Report the bypass and stop using the crane until the switch is restored Correct answer.
  4. Operate at slow speed and rely on a spotter at the runway end

Explanation

A bypassed limit switch removes an engineering control that prevents the crane from overrunning the runway end, so the crane is not safe to operate. The defect must be reported and the crane isolated until repaired. Spotters and slow speeds are not substitutes for a functioning safety device.

Question 31Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Which practice best reduces the risk of a load slipping out of a two-leg sling during a lift?

  1. Attaching the sling hooks to the load's edge rather than a certified lifting point
  2. Using the load's centre of gravity as the only rigging reference
  3. Keeping the sling legs as close to horizontal as possible
  4. Attaching to certified lifting points and keeping the included angle within the sling's rating Correct answer.

Explanation

Certified lifting points are designed for the load, and the included angle between sling legs determines the tension in each leg. As the angle widens, leg tension rises sharply and can exceed the rating. Rigging to designed points within the rated angle keeps the assembly within its safe working load.

Question 32Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A crane is being used to lift a load that is partially buried in the ground. Why is this hazardous?

  1. The load will always rotate during the lift
  2. The hoist rope will wear faster than normal
  3. The crane's travel brakes will overheat
  4. The load may be heavier than expected and the ground may hold it, causing overload Correct answer.

Explanation

A buried or snagged load creates an unknown resistance, so the actual force on the hoist, rope and structure can far exceed the load's weight. This can overload the crane and cause structural failure or rope breakage. The load must be freed and its weight confirmed before lifting.

Question 33Hazard identification, risk assessment and risk control for bridge and gantry crane operations

What is the role of a pre-start inspection of a bridge crane?

  1. To record the crane's production output for the shift
  2. To detect visible defects and confirm safety devices function before use Correct answer.
  3. To verify the crane's structural design against the standard
  4. To replace the need for periodic major inspections

Explanation

A pre-start check is a visual and functional check for defects such as damaged ropes, worn hooks, faulty brakes and inoperative limit switches. It does not replace scheduled inspections by competent persons or design verification, and it is not a productivity record.

Question 34Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Two cranes are working on the same runway. Which control is most important to prevent collision?

  1. Painting each crane a different colour
  2. Requiring operators to use hand signals
  3. Fitting anti-collision devices and defining travel zones for each crane Correct answer.
  4. Restricting both cranes to a single speed setting

Explanation

Anti-collision systems and defined travel zones are engineering and planning controls that physically reduce the chance of contact between cranes. Colour and hand signals are administrative and depend on human vigilance. A single speed setting does not prevent collision.

Question 35Hazard identification, risk assessment and risk control for bridge and gantry crane operations

What is the key risk when a crane's brakes are not holding a suspended load?

  1. The load may drift and drop, striking people or structures below Correct answer.
  2. The load will become lighter
  3. The crane's runway rails will expand
  4. The hoist motor will run faster than rated

Explanation

Brake failure means the load cannot be held, so it may descend uncontrolled or drop. The drop zone must be cleared and the crane taken out of service. The other outcomes are not consequences of brake failure.

Question 36Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A load must be lifted over a section of the plant where workers are performing maintenance. What is the best sequence of controls?

  1. Notify the workers and lift at normal speed
  2. Ask workers to watch the load and move if it swings
  3. Reschedule the lift if possible, otherwise evacuate and barricade the area before lifting Correct answer.
  4. Schedule the lift during a meal break and proceed without barriers

Explanation

Eliminating the exposure by rescheduling is the preferred control. Where that is not possible, the area must be cleared and physically barricaded so no one is beneath the load. Notification, timing and asking workers to dodge do not remove the hazard.

Question 37Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Which condition would most likely indicate that a wire rope on a crane hoist needs replacement?

  1. Broken wires concentrated in one rope lay, exceeding the rejection criteria Correct answer.
  2. A light film of lubricant on the strands
  3. Normal elongation under the working load
  4. A slight colour change on the outer strands

Explanation

Concentrated broken wires within a single lay reduce the rope's strength and typically exceed the rejection criteria set for that rope construction. Lubrication, surface colour and elastic elongation under load are normal. The rope must be assessed against the applicable criteria and replaced if rejected.

Question 38Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Why is a level, well-maintained runway important for gantry crane safety?

  1. Uneven or misaligned rails can cause skewing, derailment and structural loading Correct answer.
  2. It improves the crane's paint finish
  3. It reduces the length of the hoist rope needed
  4. It allows the crane to lift heavier loads than its rating

Explanation

Runway alignment and level affect how the crane's wheels track and how loads are distributed through the structure. Misaligned or uneven rails cause skewing forces, rail climbing and derailment. Runway condition does not change the rated capacity.

Question 39Hazard identification, risk assessment and risk control for bridge and gantry crane operations

What should an operator do if they lose sight of the dogman during a lift?

  1. Complete the lift by estimating the dogman's intended signals
  2. Ask a nearby worker to relay signals
  3. Stop the lift until communication is re-established Correct answer.
  4. Continue the lift at creep speed

Explanation

Loss of communication means the operator no longer has control of the lift and cannot know whether the load path is clear. The lift must stop until reliable communication is restored. Guessing signals or using an untrained relay creates additional risk.

Question 40Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A crane is fitted with a load limiter that has been triggering during lifts of a load recorded as within capacity. What is the most appropriate first step?

  1. Override the limiter to complete the task
  2. Reduce the load by removing items until the alarm stops
  3. Assume the limiter is faulty and continue
  4. Stop and investigate the actual load weight and the crane's configuration Correct answer.

Explanation

A load limiter activating indicates the measured load or moment has reached the set point, which may reflect an understated load, a radius change or a rigging factor. The cause must be investigated before lifting continues. Overriding or assuming a fault defeats the safety device.

Question 41Hazard identification, risk assessment and risk control for bridge and gantry crane operations

Which of these is an example of a hazard created by poor housekeeping in a crane operating area?

  1. A dogman wearing a high-visibility vest
  2. A load chart displayed in the cabin
  3. A crane with a recently serviced brake
  4. Loose materials on the floor that can be struck or drawn into the crane's path Correct answer.

Explanation

Loose objects in the operating area can be struck by the crane, become projectiles or cause a person to trip while guiding a load. Serviced brakes, a displayed load chart and high-visibility clothing are all positive safety features.

Question 42Hazard identification, risk assessment and risk control for bridge and gantry crane operations

During a lift, the load begins to swing toward a worker standing near the drop zone. What is the best immediate action?

  1. Signal the worker to catch and steady the load
  2. Lower the load quickly to the ground
  3. Stop the motion and let the load settle while the worker moves clear Correct answer.
  4. Speed up the hoist to lift the load clear of the worker

Explanation

Stopping the initiating motion allows the pendulum swing to dampen rather than amplify. The worker moves clear of the drop zone and the lift resumes only when control is regained. Rapid lowering or hoisting adds momentum and catching a moving load endangers the worker.

Question 43Hazard identification, risk assessment and risk control for bridge and gantry crane operations

What information should be confirmed before using a spreader beam for a lift?

  1. The colour of the beam matches the crane
  2. The beam has been used on the same site previously
  3. The beam's rated capacity and the lift points are suitable for the load Correct answer.
  4. The beam is lighter than the load being lifted

Explanation

A spreader beam is lifting equipment with its own rated capacity, and its lift points must suit the load's geometry and centre of gravity. Confirming both prevents overloading the beam and the crane. Colour, prior site use and relative mass are not capacity evidence.

Question 44Hazard identification, risk assessment and risk control for bridge and gantry crane operations

A crane operator is asked to make a lift that requires the boom or trolley to move outside the area covered by the lift plan. What should the operator do?

  1. Proceed if the load looks stable
  2. Proceed and update the plan afterwards
  3. Refuse the lift until the plan is reviewed and the new area is assessed Correct answer.
  4. Proceed only if the dogman agrees

Explanation

The lift plan defines the assessed area, load path and controls. Moving outside it introduces hazards that have not been evaluated, such as new exclusion zones, services or structural obstructions. The operator must stop and have the plan reviewed before proceeding.

Question 45Bridge and gantry crane types, components, terminology and load charts

What does the rated capacity of a bridge crane represent?

  1. The maximum load the crane is designed to lift under stated conditions Correct answer.
  2. The load at which the hoist motor stalls under continuous use
  3. The total mass of the crane including the trolley and hoist
  4. The heaviest load ever lifted by the crane on site

Explanation

Rated capacity is the maximum load a crane is designed to handle under the conditions specified by the manufacturer, such as radius and reeving. It is a design limit, not a record of past lifts or a measure of the crane's own mass. Exceeding it removes the safety margin built into the structure and hoist.

Question 46Bridge and gantry crane types, components, terminology and load charts

On an overhead travelling bridge crane, what is the purpose of the end stops (buffers) fitted to the bridge?

  1. To prevent the hoist block from contacting the drum
  2. To guide the festoon cable along the bridge girder
  3. To limit travel along the runway and absorb impact at the runway ends Correct answer.
  4. To hold the bridge stationary while the trolley traverses

Explanation

End stops and buffers are fitted at the limits of bridge travel to stop the crane and absorb kinetic energy if it overruns its normal travel position. They protect the runway structure and the crane from severe impact. They play no role in holding the bridge during trolley movement or in rope guidance.

Question 47Bridge and gantry crane types, components, terminology and load charts

In crane terminology, what is the span of a bridge crane?

  1. The horizontal distance between the centres of the runway rails Correct answer.
  2. The distance the trolley can travel along the bridge girder
  3. The vertical distance from the floor to the underside of the girder
  4. The length of wire rope wound on the hoist drum

Explanation

Span is the horizontal distance measured between the centre lines of the two runway rails on which the bridge travels. It defines the width of the area the crane can cover. It is not a vertical dimension, a trolley travel distance, or a rope length.

Question 48Bridge and gantry crane types, components, terminology and load charts

What is the main distinguishing feature of a gantry crane compared with an overhead bridge crane?

  1. The bridge is suspended from the building roof structure
  2. The hoist is mounted on a rotating superstructure
  3. The crane travels on rubber tyres only
  4. The bridge is supported on legs that travel on rails at ground level Correct answer.

Explanation

A gantry crane carries its bridge on legs or a frame that runs on rails, often at ground or yard level, rather than on elevated runway beams fixed to a building. Overhead bridge cranes depend on an elevated runway. The legs allow the gantry to work over open areas such as storage yards.

Question 49Bridge and gantry crane types, components, terminology and load charts

What information does a crane load chart provide to the operator?

  1. The maintenance schedule for the hoist gearbox
  2. The wind speed at which the crane was last inspected
  3. The electrical wiring diagram for the control pendant
  4. Rated capacities for the crane under specified configurations and conditions Correct answer.

Explanation

A load chart sets out the rated capacity of the crane for each permitted configuration, such as trolley position, reeving and boom or jib condition. It is the primary reference for deciding whether a lift is within the crane's design limits. It does not cover maintenance scheduling, wiring, or inspection history.

Question 50Bridge and gantry crane types, components, terminology and load charts

What is the function of the hoist limit switch on a bridge crane?

  1. To prevent the bridge from travelling past the runway end
  2. To limit the speed of trolley travel along the girder
  3. To measure the weight of the load being lifted
  4. To stop the hoist before the hook block reaches the drum or upper limit Correct answer.

Explanation

The hoist limit switch detects when the hook block approaches its upper travel limit and stops the hoist motion to prevent two-blocking or rope damage. It protects the hoist from over-winding. It does not control trolley or bridge travel and does not weigh loads.