Rigging Test Level Two By Shahid Iqbal
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When are tag lines are used?
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Only in windy conditions
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When authorized by the supervisor
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At all times to control the loads
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When authorized by the rigger
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Crane lifting and rigging test: trivia quiz. If you are applying for a post as a rigger, you need to know how to use different types of cranes to move around different types of loads in a workstation. Do you know how to match cranes with different capacity and the maximum load weight they can carry? The quiz below will See morebe a perfect way to refresh your memory. Check it out!
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- 2.
What is the maximum standard load that can be rigged by a rigger lll without supervision?
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5 ton
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8 ton
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10 ton
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12 ton
Correct Answer
A. 10 tonExplanation
A rigger lll is a highly skilled and experienced professional who can handle heavy loads. They have the knowledge and expertise to rig loads up to a certain weight without supervision. In this case, the maximum standard load that a rigger lll can handle without supervision is 10 tons. This means that they are capable of safely rigging and moving loads weighing up to 10 tons without the need for direct supervision.Rate this question:
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- 3.
When performing tandem lifts, the lift area must be_______?
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Open
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Clean
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Asphalted
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Barricaded
Correct Answer
A. BarricadedExplanation
During tandem lifts, it is necessary to barricade the lift area. This is because tandem lifts involve the use of multiple cranes or lifting equipment to lift and transport heavy loads. Barricading the lift area ensures that unauthorized personnel or vehicles do not enter the area, reducing the risk of accidents or injuries. It also helps in maintaining a safe distance from the lift operation, preventing any potential damage to nearby structures or equipment.Rate this question:
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- 4.
In what condition must a crane be before lifting operations are undertaken?
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Cleaned
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Painted
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Greased
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Leveled
Correct Answer
A. LeveledExplanation
Before lifting operations are undertaken, a crane must be leveled. This is important because if the crane is not level, it can lead to instability and potential accidents during lifting. A level crane ensures that the load is properly balanced and distributed, reducing the risk of tipping or imbalance. It also allows for more precise and controlled lifting operations, enhancing safety for both the crane operator and those working in the vicinity. Therefore, ensuring that the crane is leveled is a crucial step before starting any lifting operations.Rate this question:
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- 5.
What level of rigger can approve critical lift plans?
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Rigger specialist.
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Rigger lll
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Rigger ll
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Rigger l
Correct Answer
A. Rigger lExplanation
The correct answer is Rigger l. A Rigger l is the highest level of rigger who can approve critical lift plans. This indicates that they have the necessary knowledge, skills, and experience to assess and authorize complex and high-risk lifting operations. Rigger specialists, Rigger lll, and Rigger ll may have expertise in rigging but may not have the authority to approve critical lift plans.Rate this question:
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- 6.
Before performing any pick and carry operation, the rigger must ensure the travel path is_________?
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Level and in good condition
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Made of asphalt or concrete
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Made of soft level sand
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Inclined towards the pick-up point
Correct Answer
A. Level and in good conditionExplanation
Before performing any pick and carry operation, the rigger must ensure that the travel path is level and in good condition. This is important to ensure the stability and safety of the load being carried. A level path reduces the risk of the load tipping or shifting during transportation. Additionally, a path in good condition minimizes the chances of any obstacles or hazards that could cause accidents or damage to the load. Therefore, it is crucial for the rigger to inspect and confirm that the travel path meets these requirements before proceeding with the pick and carry operation.Rate this question:
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- 7.
If a crane is designated to perform pick and carry duties, the details will be available in the _________.
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Engine specifications
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Range diagram
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Load charts
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Operator’s log
Correct Answer
A. Load chartsExplanation
Load charts provide information about the lifting capacity of a crane based on factors such as boom length, angle, and radius. If a crane is designated to perform pick and carry duties, the load charts will have specific information regarding the maximum weight that the crane can safely lift and carry. This information is crucial for the operator to ensure that the crane is not overloaded and operated within its safe working limits. Therefore, the details of pick and carry duties for a crane will be available in the load charts.Rate this question:
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- 8.
What is the distance from the center of rotation of a crane to the center of a load called?
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Boom
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Radius
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Crane reach
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Centers
Correct Answer
A. RadiusExplanation
The distance from the center of rotation of a crane to the center of a load is called the radius. This term is commonly used in the context of cranes to describe the length of the arm or boom that extends from the center of rotation to the point where the load is attached. The radius determines the maximum reach or distance that the crane can extend to lift objects.Rate this question:
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- 9.
What is required when performing high-level/long reach crane lifts?
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Lift plan
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Cold work permit
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Personnel platform permit
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Inspection checklist
Correct Answer
A. Lift planExplanation
When performing high-level/long reach crane lifts, a lift plan is required. A lift plan is a comprehensive document that outlines the details of the lift, including the equipment to be used, the load weight and dimensions, the crane configuration, the lift path, and any necessary safety precautions. It helps ensure that the lift is carried out safely and efficiently, minimizing the risk of accidents or damage to the load or equipment. Without a lift plan, there is a higher chance of errors or oversights that could lead to dangerous situations.Rate this question:
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- 10.
Which two people must be in radio communication with each other during a tandem lift?
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Supervisor and signal man
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Signalman and riggers
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Crane operator and rigger directing the lift
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Crane operator and superintendent
Correct Answer
A. Crane operator and rigger directing the liftExplanation
During a tandem lift, the crane operator and the rigger directing the lift must be in radio communication with each other. This is because the crane operator needs clear instructions from the rigger to ensure the safe and precise movement of the load. The rigger, on the other hand, needs to communicate any changes or adjustments required during the lift to the crane operator. This communication is essential to maintain coordination and avoid any potential accidents or mishaps during the tandem lift.Rate this question:
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- 11.
Critical lift plans must be reviewed and signed prior to the Lift by?
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Saudi Aramco safety engineer
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Saudi Aramco certified rigger
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Saudi Aramco superintendent
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Saudi Aramco loss prevention representative
Correct Answer
A. Saudi Aramco certified riggerExplanation
Critical lift plans must be reviewed and signed prior to the lift by a Saudi Aramco certified rigger. This is because a certified rigger has the necessary knowledge and expertise to assess the safety aspects of the lift. They are trained to understand the complexities and risks associated with lifting operations and can ensure that the lift plan is in compliance with safety regulations and standards. By having a certified rigger review and sign off on the lift plan, it helps to minimize the potential for accidents and ensures that the lift is conducted safely and efficiently.Rate this question:
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- 12.
Critical lifts may be performed by
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Riggers certified for the load category
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Engineer
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Rigger supervisors
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Any level rigger
Correct Answer
A. Riggers certified for the load categoryExplanation
Critical lifts require a higher level of expertise and knowledge due to the potential risks involved. Riggers who are certified for the specific load category have undergone specialized training and have demonstrated their competence in handling such lifts. They possess the necessary skills and understanding of the load requirements, equipment, and safety protocols to ensure a safe and successful lift. Therefore, only riggers certified for the load category should be entrusted with performing critical lifts.Rate this question:
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- 13.
When performing high-level/long-reach crane lifts, the rigger must ensure that he is _________.
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Wearing safety glasses
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Visible to the operator
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Positioned under the boom
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Positioned behind the crane
Correct Answer
A. Visible to the operatorExplanation
When performing high-level/long-reach crane lifts, it is crucial for the rigger to be visible to the operator. This is important for maintaining clear communication and coordination between the rigger and the crane operator. Being visible allows the operator to have a clear line of sight to the rigger's hand signals and instructions, ensuring the safety and effectiveness of the lift operation.Rate this question:
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- 14.
During tandem and multiple crane lifts, the hoist lines must be kept________.
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Moving
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Vertical
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Horizontal
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Stationary
Correct Answer
A. VerticalExplanation
During tandem and multiple crane lifts, the hoist lines must be kept vertical to ensure the stability and safety of the lift. Keeping the hoist lines vertical helps to distribute the load evenly between the cranes and prevents any swinging or shifting of the load. This minimizes the risk of accidents or damage to the equipment and ensures that the lift is carried out smoothly and efficiently.Rate this question:
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- 15.
What must workmen wear when working in a personnel platform?
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Safety belts
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Coveralls
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Air packs
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Safety gloves
Correct Answer
A. Safety beltsExplanation
Workmen must wear safety belts when working in a personnel platform to ensure their safety and prevent falls. Safety belts are designed to secure the worker to the platform, providing a reliable restraint system and minimizing the risk of accidents. By wearing safety belts, workmen can maintain balance and stability while working at heights, reducing the likelihood of injuries or fatalities.Rate this question:
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- 16.
Before giving signature approval to a lift plan the rigger 1 must?
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Phone the lift supervisor to conform the lift parameter
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Phone loss prevention to conform lift weight
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Check the load weight and radius with the foreman
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Physically inspect the lift site
Correct Answer
A. Physically inspect the lift siteExplanation
Before giving signature approval to a lift plan, the rigger must physically inspect the lift site. This is important to ensure that the site is suitable for the planned lift and that there are no potential hazards or obstacles that could affect the lift operation. By physically inspecting the lift site, the rigger can assess the conditions, evaluate the positioning of equipment, and make any necessary adjustments or recommendations to ensure the safety and success of the lift. This step helps to minimize the risk of accidents or damage during the lifting operation.Rate this question:
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- 17.
Where can the information be found on a crane’s quadrant of operation?
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On boom of the crane
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On the load chart
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In the maintenance checklist
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On the chassis of the crane
Correct Answer
A. On the load chartExplanation
The information about a crane's quadrant of operation can be found on the load chart. The load chart provides specific details and guidelines about the crane's lifting capacities and operating ranges. It helps operators determine the safe working load limits based on factors such as boom length, angle, and radius. By referring to the load chart, operators can ensure that they are operating within the crane's safe operating parameters and avoid accidents or damage to the crane or load.Rate this question:
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- 18.
What is the purpose of tag lines?
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To tie off suspended loads to the hook block
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To control the boom swing
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To control suspended load site
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To tie off suspended loads to the crane
Correct Answer
A. To control suspended load siteExplanation
Tag lines are used to control the movement and positioning of suspended loads on a crane. They help in maintaining stability and preventing the load from swinging or spinning uncontrollably. By using tag lines, operators can safely guide and direct the load to the desired location, ensuring that it does not pose a risk to the surrounding area or personnel. Therefore, the purpose of tag lines is to control the suspended load site.Rate this question:
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- 19.
BLIND LIFT IS WHEN THE LIFT DOES NOT ALLOW DIRECT VISUAL CONTACT BETWEEN:
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The signalman and the boom
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The signalman and the load
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The crane operator and the signalman
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The crane operator and the load
Correct Answer
A. The crane operator and the signalmanExplanation
Blind lift is a situation where the crane operator and the signalman are unable to have direct visual contact with each other. This can occur due to various reasons such as obstructions or distance between them. In such cases, the signalman must rely on communication methods like hand signals or radios to guide the crane operator in lifting and moving the load safely. Direct visual contact is crucial for effective communication and coordination between the crane operator and the signalman to prevent accidents and ensure smooth operations.Rate this question:
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- 20.
What is the minimum sling angle for any personnel platform?
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25 degrees
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30 degrees
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35 degrees
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45 degrees
Correct Answer
A. 45 degreesExplanation
The minimum sling angle for any personnel platform is 45 degrees. This is because a greater sling angle would result in increased stress on the sling and decreased stability for the platform. A 45-degree angle provides a balance between stability and load distribution, ensuring the safety of personnel using the platform.Rate this question:
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- 21.
On tailing lifts, what equipment ensures the load hangs freely and the weight is evenly distributed?
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Shackles
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Slings
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Lifting beams
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Come-longs
Correct Answer
A. Lifting beamsExplanation
Lifting beams are equipment that ensure the load hangs freely and the weight is evenly distributed on tailing lifts. They are specifically designed to provide stability and balance while lifting heavy loads. Lifting beams typically have multiple attachment points for slings or shackles, allowing for secure and even distribution of the load's weight. This helps prevent any imbalances or strain on the lifting equipment, ensuring safe and efficient lifting operations.Rate this question:
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- 22.
What types of cranes are recommended to be used when tandem lifting?
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Any model or type
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Lattice and hydraulic
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Truck-mounted and crawler
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Equal capacity and same models
Correct Answer
A. Equal capacity and same modelsExplanation
When tandem lifting, it is recommended to use cranes that have equal capacity and are of the same models. This ensures that both cranes can handle the load effectively and work together seamlessly. Using cranes with different capacities or models can lead to imbalances and difficulties in coordinating the lifting process. Therefore, using cranes with equal capacity and the same models is the best choice for tandem lifting operations.Rate this question:
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- 23.
What precaution must be taken when positioning cranes equipped with outriggers on soft ground?
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Lift over the front only
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Place pads under the outrigger floats
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Place outriggers and tires on the ground
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Use only a short boom
Correct Answer
A. Place pads under the outrigger floatsExplanation
When positioning cranes equipped with outriggers on soft ground, it is necessary to place pads under the outrigger floats. This precaution helps to distribute the weight of the crane and prevent the outriggers from sinking into the soft ground. By providing a stable and level surface for the outriggers, the pads ensure that the crane remains balanced and secure during lifting operations.Rate this question:
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- 24.
A critical lift in Saudi Aramco is when a crane boom or boom attachment is working within ________ meter of any populated/traffic areas?
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10
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12
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15
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18
Correct Answer
A. 10Explanation
A critical lift in Saudi Aramco is when a crane boom or boom attachment is working within 10 meters of any populated/traffic areas. This distance is considered critical to ensure the safety of people and vehicles in the vicinity. It allows for enough space to prevent any potential accidents or damage that could occur if the crane boom or attachment were to come into contact with the populated or traffic areas.Rate this question:
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- 25.
High level/ long reach crane lifts cannot be made in wind speeds of_______?
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20 mph
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30 mph
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40 mph
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60 mph
Correct Answer
A. 20 mphExplanation
High level/ long reach cranes are not able to make lifts in wind speeds of 20 mph. This is because strong winds can cause instability and pose a safety risk to the crane and its operators. Operating a crane in high wind speeds can lead to accidents, such as the crane tipping over or the load being swung out of control. Therefore, it is important to consider wind speeds and take necessary precautions to ensure safe crane operations.Rate this question:
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- 26.
Where is the information located to determine if a crane can be used for pick and carry duties?
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Load chart
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Riggers handbook
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Saudi Aramco G.I.s
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Operator’s manual
Correct Answer
A. Load chartExplanation
The information to determine if a crane can be used for pick and carry duties is located in the load chart. The load chart provides specific details about the crane's lifting capacity, including its maximum load capacity at different boom lengths and angles. This information is crucial for determining whether the crane is suitable for pick and carry operations, as it ensures that the crane can safely lift and transport loads without exceeding its capacity.Rate this question:
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- 27.
Tandem lifts of over 40 tones can only be performed by?
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Rigger l
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Rigger lI
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Rigger lII
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Crane and rigging specialist
Correct Answer
A. Rigger lExplanation
Rigger l is the correct answer because they have the necessary skills and expertise to perform tandem lifts of over 40 tons. Tandem lifts involve coordinating multiple cranes or hoists to lift and move heavy loads simultaneously. Rigger l has the knowledge of rigging techniques, equipment, and safety protocols required to safely and efficiently execute these complex lifts. Rigger lI and Rigger lII may have additional qualifications and experience, but they are not specifically mentioned as being required for tandem lifts of this magnitude. The option of "Crane and rigging specialist" is not as specific as Rigger l, and it is unclear if this specialist has the necessary skills for tandem lifts.Rate this question:
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- 28.
What affects the capacity of a crane?
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The service date
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The boom length
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The identification plan
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The inspection date
Correct Answer
A. The boom lengthExplanation
The capacity of a crane is affected by the boom length. The longer the boom length, the higher the capacity of the crane. This is because a longer boom allows the crane to reach greater heights and lift heavier loads. The boom length determines the maximum radius and height at which the crane can operate effectively. Therefore, a crane with a longer boom length will have a greater capacity compared to a crane with a shorter boom length.Rate this question:
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- 29.
What is the correct position of the outriggers before lifting operation can be started?
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Retracted
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Extended
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Over the rear
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Stowed
Correct Answer
A. ExtendedExplanation
Before a lifting operation can be started, the correct position of the outriggers is extended. Outriggers are devices used to provide stability and support to cranes or other lifting equipment. By extending the outriggers, the base of the equipment is widened, increasing its stability and preventing it from tipping over during the lifting process. Therefore, it is necessary to have the outriggers fully extended and securely in place before commencing any lifting operation.Rate this question:
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- 30.
When must personnel platforms be inspected by inspection department?
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Every 1 month
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Every 2 months
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Every 6 months
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Every year
Correct Answer
A. Every 6 monthsExplanation
Personnel platforms must be inspected by the inspection department every 6 months. This regular inspection ensures that the platforms are in proper working condition and safe for use. By conducting inspections every 6 months, any potential issues or damages can be identified and addressed in a timely manner, reducing the risk of accidents or injuries. This periodic inspection schedule also helps to comply with safety regulations and maintain the overall integrity and functionality of the personnel platforms.Rate this question:
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- 31.
when using a radio for a blind lift what precaution must be taken?
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The crane must be visible
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The lift must be at night
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Back-up communications must in place
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The signalman must be visible
Correct Answer
A. Back-up communications must in placeExplanation
When using a radio for a blind lift, it is crucial to have back-up communications in place. This is necessary to ensure that there is an alternative method of communication in case the radio fails or encounters any issues. Back-up communications can include methods such as hand signals, visual cues, or alternative communication devices. Having this precaution in place ensures that there is a reliable means of communication between the operator and the signalman, enhancing safety and efficiency during the blind lift operation.Rate this question:
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- 32.
A crane has a rated capacity of 56,000 lbs what is the maximum load weight that can be lifted without a lift plan
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28,000 lbs
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36,000 lbs
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42,000 lbs
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47,600 lbs
Correct Answer
A. 47,600 lbsExplanation
The maximum load weight that can be lifted without a lift plan is 47,600 lbs. This is because the crane has a rated capacity of 56,000 lbs, and without a lift plan, it is generally recommended to not exceed 85% of the rated capacity. Therefore, 85% of 56,000 lbs is 47,600 lbs.Rate this question:
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- 33.
When performing pick and carry operations, the load must be _______.
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Raised to the boom tip
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Secured to the carrier
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Left to swing free
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Secured to the boom
Correct Answer
A. Secured to the carrierExplanation
During pick and carry operations, it is important to secure the load to the carrier. This is necessary to ensure the stability and safety of the operation. If the load is not properly secured, it can swing or shift during movement, potentially causing damage to the equipment or injury to personnel. By securing the load to the carrier, it remains stable and reduces the risk of accidents or damage.Rate this question:
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- 34.
AIR TUGGERS CAN ONLY BE USED TO?
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Drag loads
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Lift personnel
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Hoist material
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Perform tandem lifts
Correct Answer
A. Hoist materialExplanation
Air tuggers are specifically designed to hoist or lift material. They are typically used in industrial settings to move heavy loads vertically or horizontally. These machines are equipped with powerful motors and lifting mechanisms that allow them to safely and efficiently lift and transport heavy objects. Air tuggers are commonly used in construction, manufacturing, and other industries where there is a need to move heavy materials or equipment. They are not designed for dragging loads, lifting personnel, or performing tandem lifts.Rate this question:
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- 35.
Cranes working near trenches and evacuations (class “A” soils) shall be a minimum distance from the trench or...?
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The width of the crane
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The depth of the trench
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The width of the trench
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The length of the crane
Correct Answer
A. The depth of the trenchExplanation
Cranes working near trenches and evacuations (class "A" soils) shall be a minimum distance from the trench based on the depth of the trench. This means that the deeper the trench, the farther away the crane needs to be. The depth of the trench is an important factor to consider in order to ensure the safety of the crane and prevent any accidents or damage to the trench.Rate this question:
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- 36.
When performing pick and carry operations with a rough-terrain crane, the boom must be positioned over the _____________?
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Front of the crane
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Back of the crane
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Left side of the crane
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Right side of the crane
Correct Answer
A. Front of the craneExplanation
When performing pick and carry operations with a rough-terrain crane, the boom must be positioned over the front of the crane. This is because the front of the crane is designed to bear the weight of the load and provide stability during the lifting and carrying process. Placing the boom over the front ensures that the load is properly balanced and reduces the risk of tipping or instability.Rate this question:
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- 37.
Records are not required to be entered in the sling log for
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Periodic inspections
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Annual inspections
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Frequent inspections
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Daily inspections
Correct Answer
A. Daily inspectionsExplanation
Daily inspections do not need to be recorded in the sling log because they are performed on a regular basis and are typically part of the routine maintenance and safety checks. These inspections are often quick and simple, involving a visual inspection of the equipment to ensure it is in good working condition. Since daily inspections are regularly conducted, recording them in the sling log may be unnecessary and time-consuming. On the other hand, periodic, annual, and frequent inspections are more comprehensive and may involve detailed assessments and measurements, which are important to document in the sling log for record-keeping and future reference.Rate this question:
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- 38.
When performing pick and carry operations, the load must be __________.
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Tied to the drivers cab
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Tied back to the boom
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Allowed to swing
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Tied back to the carrier
Correct Answer
A. Tied back to the carrierExplanation
When performing pick and carry operations, it is important to tie the load back to the carrier. This ensures that the load remains secure and stable during transportation. Tying the load back to the carrier prevents it from swinging or moving unnecessarily, reducing the risk of accidents or damage to the load. By securing the load to the carrier, it also allows the driver to have better control and maneuverability while operating the equipment.Rate this question:
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- 39.
A crane has a rated capacity of 20,000 lbs. applying the rule for critical lifts from 7.028, what is the maximum load weight that can be lifted without a critical lift plan?
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17,000 lbs
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15,000 lbs
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10,000 lbs
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8,500 lbs
Correct Answer
A. 17,000 lbsExplanation
According to the rule for critical lifts, a load that is equal to or greater than 75% of the crane's rated capacity requires a critical lift plan. In this case, the crane's rated capacity is 20,000 lbs. So, 75% of 20,000 lbs is 15,000 lbs. Therefore, any load below 15,000 lbs can be lifted without a critical lift plan. Since the maximum load weight given is 17,000 lbs, it is within the limit and does not require a critical lift plan.Rate this question:
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- 40.
A crane has a rated capacity of 16,000 lbs what is the maximum load weight that can be lifted without a lift plan?
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8,500 lbs
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13,600 lbs
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12,000 lbs
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15,000 lbs
Correct Answer
A. 13,600 lbsExplanation
The maximum load weight that can be lifted without a lift plan is 13,600 lbs. This is because the crane has a rated capacity of 16,000 lbs, and without a lift plan, it is generally recommended to operate at 85% of the rated capacity to ensure safety. Therefore, 85% of 16,000 lbs is 13,600 lbs.Rate this question:
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- 41.
What must be done if the boom is between two values on a range chart?
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Calculate the difference
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Use a shorter boom length
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Use a longer boom length
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Move the crane
Correct Answer
A. Use a longer boom lengthExplanation
If the boom is between two values on a range chart, it means that the current boom length is not sufficient to reach the desired distance. To rectify this, a longer boom length should be used. This will ensure that the crane can reach the required range and perform the task effectively.Rate this question:
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- 42.
When working less than 1 ½ fully extended boom lengths from energized power-line, what precaution must be taken?
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Positioned a signalman to ensure safe distances
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Use synthetic slings
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Barricade the area below the power lines
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Do not work when humidity is high
Correct Answer
A. Positioned a signalman to ensure safe distancesExplanation
When working less than 1 ½ fully extended boom lengths from an energized power-line, it is important to position a signalman to ensure safe distances. This precaution is necessary to prevent any accidental contact with the power-line, which could result in electrocution or other serious injuries. The signalman's role is to communicate with the operator and guide them to maintain a safe distance from the power-line throughout the work. This helps to minimize the risk of accidents and ensure the safety of everyone involved in the operation.Rate this question:
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- 43.
Personnel with Saudi Aramco crane operator and rigger certification can?
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Can sign lift plans as both operator and rigger
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Perform both functions during a lift
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Only perform one function
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Can operate the crane and supervise the lift
Correct Answer
A. Only perform one functionExplanation
Personnel with Saudi Aramco crane operator and rigger certification can only perform one function. This means that they are qualified to either operate the crane or work as a rigger during a lift, but not both at the same time. They may have the necessary skills and knowledge to perform both tasks individually, but they are restricted to performing only one function at a time.Rate this question:
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- 44.
Tandem/ multiple or tailing lifts cannot be performed In wind speed of ______?
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5 mph
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10 mph
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15 mph
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20 mph
Correct Answer
A. 20 mphExplanation
Tandem/multiple or tailing lifts cannot be performed in wind speeds of 20 mph. This is because strong winds can create instability and make it difficult to control and maneuver the lifts safely. Higher wind speeds increase the risk of accidents, such as the loads swinging or the lifts toppling over. Therefore, it is important to adhere to safety guidelines and avoid performing these lifts in windy conditions to ensure the safety of both the workers and the loads being lifted.Rate this question:
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- 45.
Before performing any pick and carry operations, the rigger must ensure that the crane operator has _______.
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Checked the tire pressures
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Attached the fly jib
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Extended the power pin fly
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Removed the counter weight
Correct Answer
A. Checked the tire pressuresExplanation
Before performing any pick and carry operations, the rigger must ensure that the crane operator has checked the tire pressures. This is important because proper tire pressure is crucial for the safe operation of the crane. Incorrect tire pressures can affect the stability and maneuverability of the crane, potentially leading to accidents or damage to the equipment. Therefore, it is necessary for the rigger to ensure that the crane operator has checked and adjusted the tire pressures before starting any pick and carry operations.Rate this question:
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- 46.
A crane has a rated capacity of 37,000 lbs what is the maximum load weight that can be lifted without a lift plan?
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30,000 lbs
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31,450lbs
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35,000 lbs
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36,000 lbs
Correct Answer
A. 31,450lbsExplanation
The maximum load weight that can be lifted without a lift plan is 31,450 lbs. This is because the crane has a rated capacity of 37,000 lbs, and without a lift plan, it is generally recommended to operate at 85% of the rated capacity to ensure safety. Therefore, 85% of 37,000 lbs is 31,450 lbs, which is the maximum load weight that can be lifted without a lift plan.Rate this question:
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- 47.
How much of a crane’s capacity is derated when tandem lifting?
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10 %
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15 %
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25 %
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45 %
Correct Answer
A. 25 %Explanation
When tandem lifting, which refers to using two cranes simultaneously to lift a load, a crane's capacity is derated by 25%. This means that the maximum weight the crane can lift is reduced by 25% to ensure safe and stable lifting conditions. Derating the capacity is necessary because the forces and stresses on the crane increase when lifting with two cranes, and the derating factor accounts for this additional load.Rate this question:
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- 48.
What must be fitted to any crane being used for man basket operation?
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A swing away jib
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A main hook
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A limit switch
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A headache bal
Correct Answer
A. A limit switchExplanation
A limit switch must be fitted to any crane being used for man basket operation. A limit switch is a safety device that is used to prevent the crane from exceeding its maximum safe working load or reaching unsafe positions. It is designed to automatically stop the crane's motion when it reaches a predetermined limit, ensuring the safety of the personnel working in the man basket. Without a limit switch, there is a risk of overloading the crane or causing it to operate in an unsafe manner, which could lead to accidents or injuries.Rate this question:
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- 49.
Why does the capacity of a crane decrease when the boom is extended?
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Because the boom angle is increased
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Because the boom angle is decreased
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Because the radius is decreased
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Because the radius is increased
Correct Answer
A. Because the radius is increasedExplanation
When the boom of a crane is extended, the radius of the crane increases. The radius refers to the distance between the center of rotation of the crane and the load being lifted. As the radius increases, the leverage decreases, resulting in a decrease in the capacity of the crane. This means that the crane is able to lift less weight when the boom is extended compared to when it is not.Rate this question:
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Current Version
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Feb 13, 2024Quiz Edited by
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Jul 19, 2019Quiz Created by
Shahid Iqbal