Podcast
Questions and Answers
What is the sling tension on each leg in a two leg vertical hitch when the total load is 10,000 lbs?
What is the sling tension on each leg in a two leg vertical hitch when the total load is 10,000 lbs?
- 20,000 lbs
- 15,000 lbs
- 10,000 lbs
- 5,000 lbs (correct)
What happens to sling tension as the angle θ in a two leg bridle hitch decreases?
What happens to sling tension as the angle θ in a two leg bridle hitch decreases?
- Sling tension decreases
- Sling tension increases (correct)
- Sling tension remains constant
- Sling tension becomes negligible
At what angle does the sling tension equal the total load of 10,000 lbs in a two leg bridle hitch?
At what angle does the sling tension equal the total load of 10,000 lbs in a two leg bridle hitch?
- 30° (correct)
- 60°
- 10°
- 45°
What is the sling tension for each leg at a 10° angle in a bridle hitch with a total load of 10,000 lbs?
What is the sling tension for each leg at a 10° angle in a bridle hitch with a total load of 10,000 lbs?
What type of hooks are generally used at LLE for overhead cranes?
What type of hooks are generally used at LLE for overhead cranes?
What is the total sling tension in a two leg bridle hitch at a 45° angle with a total load of 10,000 lbs?
What is the total sling tension in a two leg bridle hitch at a 45° angle with a total load of 10,000 lbs?
Which hook type is permissible for point loading?
Which hook type is permissible for point loading?
At an angle of 60°, what is the sling tension on each leg in a two leg bridle hitch?
At an angle of 60°, what is the sling tension on each leg in a two leg bridle hitch?
Which of the following is NOT a requirement when using a load hook?
Which of the following is NOT a requirement when using a load hook?
What is the purpose of the latch on a hook?
What is the purpose of the latch on a hook?
Which of the following tensions occurs at a 30° angle in a two leg bridle hitch with a total load of 10,000 lbs?
Which of the following tensions occurs at a 30° angle in a two leg bridle hitch with a total load of 10,000 lbs?
If the total load is 10,000 lbs, what is the sling tension on each leg at a 60° angle?
If the total load is 10,000 lbs, what is the sling tension on each leg at a 60° angle?
Which of the following statements is true regarding the loading of hooks?
Which of the following statements is true regarding the loading of hooks?
When should additional hooks be used in rigging situations at LLE?
When should additional hooks be used in rigging situations at LLE?
Which of these is an indicator of excessive wear in a hook?
Which of these is an indicator of excessive wear in a hook?
What is a significant risk when using old or unknown rigging hardware?
What is a significant risk when using old or unknown rigging hardware?
What factor does NOT affect the load rating of a hoist ring?
What factor does NOT affect the load rating of a hoist ring?
Which of the following best describes the movement capability of hoist rings?
Which of the following best describes the movement capability of hoist rings?
What should be checked to ensure a hoist ring is safe to use?
What should be checked to ensure a hoist ring is safe to use?
Which component is commonly used alongside hoist rings in rigging?
Which component is commonly used alongside hoist rings in rigging?
What material is a hoist ring commonly made from?
What material is a hoist ring commonly made from?
When using a hoist ring on aluminum, what should be considered about the thread projection?
When using a hoist ring on aluminum, what should be considered about the thread projection?
What is a necessary requirement for each hoist ring before it can be used?
What is a necessary requirement for each hoist ring before it can be used?
What characteristic of hoist rings allows them to handle various angles of use?
What characteristic of hoist rings allows them to handle various angles of use?
What is one reason reeving slings between attachment points should be avoided?
What is one reason reeving slings between attachment points should be avoided?
What is essential before using an eye bolt for rigging?
What is essential before using an eye bolt for rigging?
What is the maximum side pull angle that should be used with shouldered eye bolts from Crosby?
What is the maximum side pull angle that should be used with shouldered eye bolts from Crosby?
Which of the following characteristics do eyebolts from different manufacturers NOT share?
Which of the following characteristics do eyebolts from different manufacturers NOT share?
What does a resultant sling angle of 1.73 lbf indicate about the forces acting on the eye bolt at a 60° upper sling angle?
What does a resultant sling angle of 1.73 lbf indicate about the forces acting on the eye bolt at a 60° upper sling angle?
When using a shouldered eye bolt, how much should the side pull be limited to for safe operation according to Chicago's ratings?
When using a shouldered eye bolt, how much should the side pull be limited to for safe operation according to Chicago's ratings?
What is the primary reason for users to look up WLL information before using an eye bolt?
What is the primary reason for users to look up WLL information before using an eye bolt?
Which statement about flat washers under the shoulder of an eye bolt is correct?
Which statement about flat washers under the shoulder of an eye bolt is correct?
Which of the following is NOT a characteristic of shouldered eye bolts?
Which of the following is NOT a characteristic of shouldered eye bolts?
To maintain safe rigging practices, what should be prioritized when selecting an eye bolt?
To maintain safe rigging practices, what should be prioritized when selecting an eye bolt?
What should be done if the installation placard is missing from a hoist ring?
What should be done if the installation placard is missing from a hoist ring?
What is the appropriate thread engagement when threading into steel?
What is the appropriate thread engagement when threading into steel?
Which tool is necessary for final tightening of the hoist ring after initial installation?
Which tool is necessary for final tightening of the hoist ring after initial installation?
What should be verified after installing a hoist ring?
What should be verified after installing a hoist ring?
Which of the following is NOT a do while using hoist rings?
Which of the following is NOT a do while using hoist rings?
What action should be taken if a hoist ring does not swivel?
What action should be taken if a hoist ring does not swivel?
What is the consequence of exceeding the load rating of a hoist ring?
What is the consequence of exceeding the load rating of a hoist ring?
How should a hoist ring be tested for damage?
How should a hoist ring be tested for damage?
Which of the following statements is correct regarding the installation of hoist rings?
Which of the following statements is correct regarding the installation of hoist rings?
What should you do if there is a gap between the hoist ring and the part being lifted?
What should you do if there is a gap between the hoist ring and the part being lifted?
Study Notes
###Â Eye BoltsÂ
- Do not use flat washers under the shoulder to position the plane of the eye
- Do not reeve slings between attachment points
- Eye bolts must have legible identification marks
- There are different manufacturers of eye bolts that have different working load limits (WLL) for the same size of bolt
- The Working Load Limit (WLL) and installation torque for eye bolts must be confirmed before they are used
Hoist Rings
- Hoist rings have free movement about two axes which allows them to always be aligned with the sling
- Do not use a hoist ring if the swivel or bail bind
- Hoist rings are load tested and come with a factory certificate
- Hoist rings are made from alloy steel or stainless steel
- The "Effective Thread Projection" must be at least twice the thread diameter when threading into aluminum
- Hoist ring load ratings and installation torque values are stamped on a placard attached to the hoist ring
- Visually inspect hoist rings for damage or corrosion on threads and body before using
- Ensure the installation placard is attached to the hoist ring
- Use an Allen wrench for initial installation and then a torque wrench for final tightening
- Make sure the thread engagement is appropriate for the base metal the bolt is being threaded into
- Verify swivel and bail functionality after installation
- Do not use hoist rings that are damaged or missing the placard
- Do not use hoist rings that are not tightened to the recommended torque
- Do not use hoist rings that do not swivel
- Do not use washers between the hoist ring and mounting surface
- Do not repair, replace, or modify any piece of a hoist ring
- Do not use a hook larger than the diameter of the hoist ring bail opening
- Never exceed the load rating of the hoist ring
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Description
Test your knowledge on the proper usage and safety guidelines for eye bolts and hoist rings. Understand the critical factors like load limits, installation, and potential hazards. This quiz will cover essential details necessary for safe rigging practices.
