Podcast
Questions and Answers
What is the primary purpose of fitting counterweights according to the load charts?
What is the primary purpose of fitting counterweights according to the load charts?
Which aspect must be closely monitored during the deployment of counterweight attachment rams?
Which aspect must be closely monitored during the deployment of counterweight attachment rams?
What is an additional check mentioned for the counterweight deployment process?
What is an additional check mentioned for the counterweight deployment process?
What potential issues should be examined in the hydraulic rams and attachments?
What potential issues should be examined in the hydraulic rams and attachments?
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Which factor is NOT considered essential when fitting counterweights?
Which factor is NOT considered essential when fitting counterweights?
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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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Why is the weight of the crane essential when planning its transportation to a site?
Why is the weight of the crane essential when planning its transportation to a site?
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For a competent person examining a mobile crane, which aspect of the Rated Capacity Chart is most significant?
For a competent person examining a mobile crane, which aspect of the Rated Capacity Chart is most significant?
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How does a crane operator utilize Rated Capacity Charts effectively?
How does a crane operator utilize Rated Capacity Charts effectively?
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What must be ensured regarding heavy transport when relocating a rough terrain crane?
What must be ensured regarding heavy transport when relocating a rough terrain crane?
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What critical information should be derived from a Rated Capacity Chart for effective crane operation?
What critical information should be derived from a Rated Capacity Chart for effective crane operation?
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What does the term R.C.L. stand for in the context of crane operations?
What does the term R.C.L. stand for in the context of crane operations?
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Which of the following statements about Rated Capacity Charts is incorrect?
Which of the following statements about Rated Capacity Charts is incorrect?
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What must be identical according to the competent person's evaluation before operating a mobile crane?
What must be identical according to the competent person's evaluation before operating a mobile crane?
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During a functional test of a mobile crane, which of the following should NOT be tested?
During a functional test of a mobile crane, which of the following should NOT be tested?
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Why are the intermediate extension positions of outriggers critical during functional load testing?
Why are the intermediate extension positions of outriggers critical during functional load testing?
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What type of support system variations can significantly impact the stability of a crane?
What type of support system variations can significantly impact the stability of a crane?
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Which of the following is true regarding the manufacturer's duty charts for cranes?
Which of the following is true regarding the manufacturer's duty charts for cranes?
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What does the term 'Variobase' refer to in the context of mobile cranes?
What does the term 'Variobase' refer to in the context of mobile cranes?
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What should the competent person ensure about the rated capacities specified for the outrigger extensions?
What should the competent person ensure about the rated capacities specified for the outrigger extensions?
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How does counterweight variation affect crane operation?
How does counterweight variation affect crane operation?
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Study Notes
Load Charts and Rated Capacity
- Rated Capacity Charts are vital for calibrating Rated Capacity Limiters (R.C.L.) to ensure safety during lifting operations.
- Correct input of information into the R.C.L. by crane operators maintains safety within the crane's design parameters.
- Technical data in these charts aids competent persons in conducting thorough examinations and functional tests of mobile cranes.
Importance of Crane Weight
- Crane weight is crucial for safe transport to locations, adhering to weight restrictions on roads and bridges.
- Rough terrain cranes require knowledge of their weight for arranging appropriate heavy transport for relocation.
Counterweights
- Proper fitting of counterweights enables cranes to operate at maximum boom lengths and radius.
- Observation of counterweight attachment rams during deployment is essential to confirm full extension and locking.
- Hydraulic rams must be inspected for leaks, loose connections, or damage before lifting the counterweight.
Rated Capacity Checks
- The competent person must verify that the rated capacity on the manufacturer's test certificate matches that of the load radius indicator and operator’s cab displays.
- All rated capacities should be identical to ensure safety and operational integrity.
Functional Testing
- A functional test without applied load must be completed to check the operation of controls, switches, and limit devices.
- Brake adjustments and limit switch operations should also be tested for proper functioning.
- Various support systems, including tracks and outriggers, influence crane stability and strength during testing.
Outrigger and Load Testing
- Outrigger extension positions must be clearly marked as per manufacturer guidelines.
- Duty charts from the manufacturer should reflect correct rated capacities for outrigger extensions.
- Support systems must accommodate specified intermediate extensions outlined in the manufacturer’s duty charts.
Counterweight Variations
- Changes in counterweight can significantly impact crane stability.
- Manufacturer duty charts provide specific ratings for each counterweight to ensure safe operation.
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