Podcast
Questions and Answers
What should be checked first to verify the Rated Capacity Limiter (RCL) is operating correctly?
What should be checked first to verify the Rated Capacity Limiter (RCL) is operating correctly?
To ensure accurate operation of the RCL, what should be verified against the rated capacity chart?
To ensure accurate operation of the RCL, what should be verified against the rated capacity chart?
Which step directly follows checking that the boom length is set correctly for the selected configuration?
Which step directly follows checking that the boom length is set correctly for the selected configuration?
How many different radii should be tested when verifying the RCL operation?
How many different radii should be tested when verifying the RCL operation?
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Which of the following is NOT included in the steps to verify the RCL operation?
Which of the following is NOT included in the steps to verify the RCL operation?
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What should be done to ensure the Load Monitoring Indicator is functioning correctly?
What should be done to ensure the Load Monitoring Indicator is functioning correctly?
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What could indicate issues with the swing gear mechanism when visually examining it?
What could indicate issues with the swing gear mechanism when visually examining it?
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What should be done if excessive movement is noted when the crane is under load?
What should be done if excessive movement is noted when the crane is under load?
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What is the primary purpose of Rated Capacity Charts?
What is the primary purpose of Rated Capacity Charts?
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Who benefits from the technical information contained in Rated Capacity Charts?
Who benefits from the technical information contained in Rated Capacity Charts?
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Why is the weight of the crane important for its operation?
Why is the weight of the crane important for its operation?
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What does the R.C.L. stand for in the context of crane operations?
What does the R.C.L. stand for in the context of crane operations?
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What type of cranes require additional consideration for weight when relocating?
What type of cranes require additional consideration for weight when relocating?
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What should crane operators input into their R.C.L. based on Rated Capacity Charts?
What should crane operators input into their R.C.L. based on Rated Capacity Charts?
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Which aspect of the crane's operations do Rated Capacity Charts assist competent persons with?
Which aspect of the crane's operations do Rated Capacity Charts assist competent persons with?
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What critical factor must be considered for crane travel besides its weight?
What critical factor must be considered for crane travel besides its weight?
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What is the purpose of a Rated Capacity Indicator (RCI)?
What is the purpose of a Rated Capacity Indicator (RCI)?
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When should a calibration check for RCIs and RCLs be performed?
When should a calibration check for RCIs and RCLs be performed?
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What is the maximum weight used for calibration checks of RCIs and RCLs?
What is the maximum weight used for calibration checks of RCIs and RCLs?
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What does RCL stand for?
What does RCL stand for?
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Which factor is considered when performing a thorough examination of RCIs and RCLs?
Which factor is considered when performing a thorough examination of RCIs and RCLs?
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How often have older legislation required overload testing for mobile cranes?
How often have older legislation required overload testing for mobile cranes?
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Who decides on the testing methods for RCIs and RCLs as per current legislation?
Who decides on the testing methods for RCIs and RCLs as per current legislation?
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What is one of the primary functions of Rated Capacity Limiters (RCLs)?
What is one of the primary functions of Rated Capacity Limiters (RCLs)?
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What is the primary purpose of Rated Capacity Charts in crane operations?
What is the primary purpose of Rated Capacity Charts in crane operations?
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How do Rated Capacity Charts assist crane operators specifically?
How do Rated Capacity Charts assist crane operators specifically?
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Which group primarily benefits from the technical information in Rated Capacity Charts?
Which group primarily benefits from the technical information in Rated Capacity Charts?
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Why is the weight of the crane specifically important according to Rated Capacity Charts?
Why is the weight of the crane specifically important according to Rated Capacity Charts?
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What essential role do Rated Capacity Charts play in crane operation planning?
What essential role do Rated Capacity Charts play in crane operation planning?
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How does a crane operator use the Rated Capacity Charts during operation?
How does a crane operator use the Rated Capacity Charts during operation?
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What can affect the decision on testing methods for RCIs and RCLs in certain regions?
What can affect the decision on testing methods for RCIs and RCLs in certain regions?
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Which procedure should be included during the thorough examination of RCIs and RCLs?
Which procedure should be included during the thorough examination of RCIs and RCLs?
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What aspect of crane operation is directly related to the information contained in Rated Capacity Charts?
What aspect of crane operation is directly related to the information contained in Rated Capacity Charts?
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What critical condition must be ensured for the relocation of rough terrain cranes?
What critical condition must be ensured for the relocation of rough terrain cranes?
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What is the primary requirement for calibration checks on RCIs and RCLs?
What is the primary requirement for calibration checks on RCIs and RCLs?
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Which of the following is a consequence of the older legislation regarding mobile cranes?
Which of the following is a consequence of the older legislation regarding mobile cranes?
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What maximum percentage of rated capacity is used for calibration checks?
What maximum percentage of rated capacity is used for calibration checks?
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What is the role of Rated Capacity Indicators (RCIs) during crane operation?
What is the role of Rated Capacity Indicators (RCIs) during crane operation?
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Which aspect is NOT typically part of the thorough examination for RCIs and RCLs?
Which aspect is NOT typically part of the thorough examination for RCIs and RCLs?
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When comparing the current regulations to older legislation, which aspect has changed regarding overload testing?
When comparing the current regulations to older legislation, which aspect has changed regarding overload testing?
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What is the significance of comparing the closed boom length of the RCL to the rated capacity chart?
What is the significance of comparing the closed boom length of the RCL to the rated capacity chart?
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When verifying the RCL function, what should be done if the capacity shown does not match the rated capacity chart?
When verifying the RCL function, what should be done if the capacity shown does not match the rated capacity chart?
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What should be verified after physically measuring the radius during RCL checks?
What should be verified after physically measuring the radius during RCL checks?
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What is the purpose of using a calibrated load cell during RCL verification?
What is the purpose of using a calibrated load cell during RCL verification?
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In addition to rated capacity charts, what is a key component that must be checked when assessing RCL operation?
In addition to rated capacity charts, what is a key component that must be checked when assessing RCL operation?
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Which factor is crucial when determining the correct rated capacity for a crane configuration?
Which factor is crucial when determining the correct rated capacity for a crane configuration?
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What should be included in the verification process of the RCL to ensure proper functionality?
What should be included in the verification process of the RCL to ensure proper functionality?
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Why is it important to verify the rated capacity charts against the specific model and type of crane?
Why is it important to verify the rated capacity charts against the specific model and type of crane?
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Study Notes
Rated Capacity Charts
- Rated Capacity Charts are essential for calibrating Rated Capacity Limiters (RCLs) and for planning safe lifting operations.
- Operators must input correct data into RCLs to avoid operating outside of crane design parameters.
- Technical information in these charts is crucial for competent examiners to conduct thorough examinations and functional tests of mobile cranes.
- Crane weight is a critical factor for safe transport, ensuring compliance with weight restrictions for roads and site conditions.
Rated Capacity Indicators and Limiters (RCIs and RCLs)
- Various types of RCIs and RCLs are found in service; older cranes may lack these devices.
- Thorough examinations of RCIs and RCLs require visual inspections, calibration checks, and functional tests.
- Calibration should occur post-major repairs or modifications, typically involving calibrated weights up to 110% of rated capacity.
Overload Testing and Legislation
- Historically, UK mobile cranes underwent overload testing at four-year intervals; this practice stems from older legislation.
- Current regulations allow discretion for competent persons regarding testing methods during thorough examinations.
Verifying RCL Operation
- Key steps to ensure RCL functionality include:
- Checking rated capacity charts against the crane model.
- Verifying closed boom lengths and capacity outputs during operation.
- Physically measuring radius to ensure accuracy of the RCL.
- Testing with known calibrated loads at multiple radii.
Load Monitoring Indicator
- The Load Monitoring Indicator, typically a remote bar graph, must be checked for functionality and security.
Swing Gear Mechanism Inspection
- Inspection of internal swing drive mechanisms relies on visual and auditory checks, as complete dismantling is not practical.
- External swing drives allow for easier examination; focus on:
- Condition of gear teeth.
- Noises from the drive motor indicating issues.
- Tightness of bolts; excessive movement under load warrants further measurement.
- Observing performance during slewing can reveal mechanical problems, including loose bolts or worn gears.
Rated Capacity Charts
- Rated Capacity Charts are essential for calibrating Rated Capacity Limiters (RCLs) and for planning safe lifting operations.
- Operators must input correct data into RCLs to avoid operating outside of crane design parameters.
- Technical information in these charts is crucial for competent examiners to conduct thorough examinations and functional tests of mobile cranes.
- Crane weight is a critical factor for safe transport, ensuring compliance with weight restrictions for roads and site conditions.
Rated Capacity Indicators and Limiters (RCIs and RCLs)
- Various types of RCIs and RCLs are found in service; older cranes may lack these devices.
- Thorough examinations of RCIs and RCLs require visual inspections, calibration checks, and functional tests.
- Calibration should occur post-major repairs or modifications, typically involving calibrated weights up to 110% of rated capacity.
Overload Testing and Legislation
- Historically, UK mobile cranes underwent overload testing at four-year intervals; this practice stems from older legislation.
- Current regulations allow discretion for competent persons regarding testing methods during thorough examinations.
Verifying RCL Operation
- Key steps to ensure RCL functionality include:
- Checking rated capacity charts against the crane model.
- Verifying closed boom lengths and capacity outputs during operation.
- Physically measuring radius to ensure accuracy of the RCL.
- Testing with known calibrated loads at multiple radii.
Load Monitoring Indicator
- The Load Monitoring Indicator, typically a remote bar graph, must be checked for functionality and security.
Swing Gear Mechanism Inspection
- Inspection of internal swing drive mechanisms relies on visual and auditory checks, as complete dismantling is not practical.
- External swing drives allow for easier examination; focus on:
- Condition of gear teeth.
- Noises from the drive motor indicating issues.
- Tightness of bolts; excessive movement under load warrants further measurement.
- Observing performance during slewing can reveal mechanical problems, including loose bolts or worn gears.
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