Crane Operator Certification Exam Prep · Question
A rigging plan specifies a synthetic web sling with a vertical WLL of 4,000 kg. If this sling is configured as a two-leg bridle hitch with a 60-degree included angle (30 degrees from vertical), what is the maximum load that can be safely lifted by the sling assembly, assuming proper application of derating factors?
For a two-leg bridle sling, the WLL is calculated as (Vertical WLL of one leg x Number of legs) x cos(angle from vertical). So, (4,000 kg x 2) x cos(30°) = 8,00
Start free practice for Crane Operator Certification Exam Prep
404 questions · no signup required · 40 free questions per day
Question: A rigging plan specifies a synthetic web sling with a vertical WLL of 4,000 kg. If this sling is configured as a two-leg bridle hitch with a 60-degree included angle (30 degrees from vertical), what is the maximum load that can be safely lifted by the sling assembly, assuming proper application of derating factors?
Answer options:
- 4,000 kg ✅ 6,928 kg
- 8,000 kg
- 4,619 kg
Correct answer: 6,928 kg
Explanation: For a two-leg bridle sling, the WLL is calculated as (Vertical WLL of one leg x Number of legs) x cos(angle from vertical). So, (4,000 kg x 2) x cos(30°) = 8,000 kg * 0.866 ≈ 6,928 kg. The 8,000 kg would only be applicable if the legs were perfectly vertical.
Start free practice for Crane Operator Certification Exam Prep
404 questions · no signup required · 40 free questions per day
More about Crane Operator Certification Exam Prep
Related Questions
- According to most Canadian provincial regulations, who is ultimately responsible for the safe operation of a c
- A crane's rated capacity decreases as the load radius:
- What is the minimum number of full wraps of wire rope that must remain on a hoist drum when the hook is in its
- Before setting up a mobile crane, what is the most important factor to assess regarding ground conditions?
- What is the purpose of an anti-two-block device on a crane?
- Why is it important to keep the load as close to the ground as possible when moving it with a crane?
More for Crane Operator Certification Exam Prep candidates
Question explanations
- According to most Canadian provincial regulations, who is ultimately responsible for the safe operation of a c
- A crane's rated capacity decreases as the load radius:
- What is the minimum number of full wraps of wire rope that must remain on a hoist drum when the hook is in its
- Before setting up a mobile crane, what is the most important factor to assess regarding ground conditions?
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Crane Operator Certification Exam Prep Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.