Do you have basic knowledge about Rigging?

1. What should you do if you notice a wire rope has evidence of heat damage?

Cool it down with water.

Ignore it.

Tell your supervisor, but keep in use.

Take out of service completely.

If a wire rope shows evidence of heat damage, it is important to take it out of service completely. Heat damage can weaken the wire rope and make it more prone to failure, which can be extremely dangerous. Continuing to use the damaged wire rope could lead to accidents or injuries. Therefore, it is crucial to notify the supervisor about the issue and replace the wire rope with a new one to ensure safety.

Explanation

If a wire rope shows evidence of heat damage, it is important to take it out of service completely. Heat damage can weaken the wire rope and make it more prone to failure, which can be extremely dangerous. Continuing to use the damaged wire rope could lead to accidents or injuries. Therefore, it is crucial to notify the supervisor about the issue and replace the wire rope with a new one to ensure safety.

2. Which is part of the Basic Guidelines?

Never exceed the W.L.L.

Always use a tag line.

Never get under the load.

All of the above.

The Basic Guidelines include three main points: never exceed the W.L.L. (Working Load Limit), always use a tag line, and never get under the load. These guidelines are important for ensuring safety and preventing accidents in lifting and rigging operations. By following all of these guidelines, workers can minimize the risk of overloading equipment, maintain control of the load, and avoid being in a dangerous position beneath the load.

Explanation

The Basic Guidelines include three main points: never exceed the W.L.L. (Working Load Limit), always use a tag line, and never get under the load. These guidelines are important for ensuring safety and preventing accidents in lifting and rigging operations. By following all of these guidelines, workers can minimize the risk of overloading equipment, maintain control of the load, and avoid being in a dangerous position beneath the load.

3. Never side load a round pin shackle.

True

False

Side loading a round pin shackle can cause it to fail under load. Round pin shackles are designed to be loaded in line with the pin, not at an angle. When a round pin shackle is side loaded, it puts stress on the pin and can cause it to bend or break. This can lead to catastrophic failure and potential injury or damage. It is important to always use shackles properly and follow manufacturer guidelines to ensure safety.

Explanation

Side loading a round pin shackle can cause it to fail under load. Round pin shackles are designed to be loaded in line with the pin, not at an angle. When a round pin shackle is side loaded, it puts stress on the pin and can cause it to bend or break. This can lead to catastrophic failure and potential injury or damage. It is important to always use shackles properly and follow manufacturer guidelines to ensure safety.

4. D to d ratio should be what?

21:1

20:1

19:1

18:1

The correct answer is 20:1. This means that the diameter to the depth ratio should be 20:1. This ratio indicates that the diameter of the object is 20 times larger than its depth.

Explanation

The correct answer is 20:1. This means that the diameter to the depth ratio should be 20:1. This ratio indicates that the diameter of the object is 20 times larger than its depth.

5. Take out of service?

5 broken wires in one strand of a lay.

10 broken wires in one entire lay.

Kinking birdcaging or distortion of wire rope.

All of the above.

The correct answer is "All of the above." This means that all of the options listed (5 broken wires in one strand of a lay, 10 broken wires in one entire lay, kinking birdcaging or distortion of wire rope) are reasons to take the wire rope out of service.

Explanation

The correct answer is "All of the above." This means that all of the options listed (5 broken wires in one strand of a lay, 10 broken wires in one entire lay, kinking birdcaging or distortion of wire rope) are reasons to take the wire rope out of service.

6. Sometimes we need to use __________ to avoid damaging rigging and/or equipment.

The working load limit

Softeners

W.L.L.

Common sense

Softeners are used to prevent damaging rigging and/or equipment. They provide a cushioning effect and help absorb shock or impact, reducing the risk of damage. By using softeners, the force or pressure applied to the rigging or equipment is distributed more evenly, preventing excessive stress or strain that could lead to damage. It is a common practice to use softeners in situations where there is a risk of damaging the rigging or equipment.

Explanation

Softeners are used to prevent damaging rigging and/or equipment. They provide a cushioning effect and help absorb shock or impact, reducing the risk of damage. By using softeners, the force or pressure applied to the rigging or equipment is distributed more evenly, preventing excessive stress or strain that could lead to damage. It is a common practice to use softeners in situations where there is a risk of damaging the rigging or equipment.

7. Does Kiewit's policy allow for chains to be used for general rigging?

No

Yes

Depends on the job.

Kiewit's policy does not allow for chains to be used for general rigging.

Explanation

Kiewit's policy does not allow for chains to be used for general rigging.

8. When using a 2-part bridle it is better to have a higher sling angle for more lifting capacity.

True

False

When using a 2-part bridle, having a higher sling angle can result in more lifting capacity. This is because a higher sling angle increases the effective length of the sling legs, which in turn reduces the load on each individual leg. By distributing the load more evenly between the legs, the overall lifting capacity of the bridle is increased. Therefore, it is true that having a higher sling angle is better for maximizing lifting capacity when using a 2-part bridle.

Explanation

When using a 2-part bridle, having a higher sling angle can result in more lifting capacity. This is because a higher sling angle increases the effective length of the sling legs, which in turn reduces the load on each individual leg. By distributing the load more evenly between the legs, the overall lifting capacity of the bridle is increased. Therefore, it is true that having a higher sling angle is better for maximizing lifting capacity when using a 2-part bridle.

9. If you are picking a unit of 16 each (12"x12"x10') long timbers that are made out of oak, how heavy is the load?

Approx. 5,000 lb.

Approx. 10,000 lb.

Approx. 15,000 lb.

Approx. 20,000 lb.

The weight of the load can be estimated by considering the weight of each timber and multiplying it by the total number of timbers. Since the weight of each timber is not given, we cannot determine the exact weight of the load. However, based on the given options, the closest estimate is approximately 10,000 lb.

Explanation

The weight of the load can be estimated by considering the weight of each timber and multiplying it by the total number of timbers. Since the weight of each timber is not given, we cannot determine the exact weight of the load. However, based on the given options, the closest estimate is approximately 10,000 lb.

10. When all legs of the sling will be equally spaced around the center of gravity, the sling sizes should be based on only four legs as the load can teeter from corner to corner thus loading only two slings.

True

False

When all legs of the sling are equally spaced around the center of gravity, the sling sizes should be based on all the legs, not just four. This is because the load can teeter from corner to corner, causing all the slings to bear the weight. Therefore, the statement is false.

Explanation

When all legs of the sling are equally spaced around the center of gravity, the sling sizes should be based on all the legs, not just four. This is because the load can teeter from corner to corner, causing all the slings to bear the weight. Therefore, the statement is false.

11. If the rigging on your hook is 1/2 inch off center, approximately what percentage of the load can it carry?

75%

80%

85%

90%

If the rigging on the hook is 1/2 inch off center, it means that the load is not evenly distributed. This can cause imbalance and reduce the load-carrying capacity of the hook. The correct answer of 80% suggests that the hook can still carry 80% of its maximum load despite the slight misalignment.

Explanation

If the rigging on the hook is 1/2 inch off center, it means that the load is not evenly distributed. This can cause imbalance and reduce the load-carrying capacity of the hook. The correct answer of 80% suggests that the hook can still carry 80% of its maximum load despite the slight misalignment.

12. When using a 2 part bridle with a sling angle of 45 degrees, what size rigging would be needed to lift a load of 31,000 pounds?

1 1/8

1 1/4

1 3/4

1/2

When using a 2 part bridle with a sling angle of 45 degrees, the load on each leg of the bridle is equal to the total load divided by the cosine of the sling angle. In this case, the load on each leg would be 31,000 pounds divided by the cosine of 45 degrees, which is approximately 43,939 pounds. To safely lift this load, a rigging size of 1 1/4 would be needed.

Explanation

When using a 2 part bridle with a sling angle of 45 degrees, the load on each leg of the bridle is equal to the total load divided by the cosine of the sling angle. In this case, the load on each leg would be 31,000 pounds divided by the cosine of 45 degrees, which is approximately 43,939 pounds. To safely lift this load, a rigging size of 1 1/4 would be needed.

13. Before using a spreader bar you must have the following items (check all that apply).

A capacity stamped on the spreader bar.

A design drawing showing correct configuration.

A photo of the spreader bar in the district office.

A pipe welded to the spreader bar with the design inside of it.

The correct answer is A capacity stamped on the spreader bar and A design drawing showing correct configuration. These two items are necessary before using a spreader bar. The capacity stamped on the spreader bar ensures that it is suitable for the load it will be lifting. The design drawing showing correct configuration is important to ensure that the spreader bar is used correctly and safely.

Explanation

The correct answer is A capacity stamped on the spreader bar and A design drawing showing correct configuration. These two items are necessary before using a spreader bar. The capacity stamped on the spreader bar ensures that it is suitable for the load it will be lifting. The design drawing showing correct configuration is important to ensure that the spreader bar is used correctly and safely.

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Do You Have Basic Knowledge About Rigging?