Crane Operator Certification Exam Prep · Question
A rigging supervisor observes a crane operator using a synthetic web sling with an included angle of 135 degrees when lifting a heavy component. Why might the supervisor intervene?
As the included angle between sling legs increases, the tension on each leg also increases, significantly reducing the effective Working Load Limit (WLL) of the
Start free practice for Crane Operator Certification Exam Prep
404 questions · no signup required · 40 free questions per day
Question: A rigging supervisor observes a crane operator using a synthetic web sling with an included angle of 135 degrees when lifting a heavy component. Why might the supervisor intervene?
Answer options:
- The crane's WLL is likely exceeded. ✅ The sling's WLL is significantly reduced at such a wide angle.
- Synthetic slings are unsuitable for such heavy components.
- The load's stability will be compromised due to the angle.
Correct answer: The sling's WLL is significantly reduced at such a wide angle.
Explanation: As the included angle between sling legs increases, the tension on each leg also increases, significantly reducing the effective Working Load Limit (WLL) of the slings. An angle of 135 degrees would dramatically decrease the sling's capacity, making it unsafe for a heavy load. While load stability might be a concern, the primary immediate risk is sling overload.
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.