examen de crane el ultimo

1. What is the capacity of a ½- inch EIPS IWRC wire rope sling in a choker hitch?. 2800 lbs. 3800 lbs. 4800 lbs. 5000 lbs.

2. Unless otherwise stated, MOST bearn clamps are designed to be loaded at what angle to the beam flange?. 45 degrees. 75 degrees. 90 degrees. 180 degrees.

3. According to ASME, when connecting to a load hook, how many slings can be placed on a hook before a collector ring should be used?. Two. Three. Four. Five.

4. When shall slings made of six-strand wire rope be immediately removed from service?. If there are 10 randomly distributed broken wires in one rope lay. If there are 8 randomly distributed broken wires in one rope lay. If there are 6 randomly distributed broken wires in one rope lay. If there are 3 randomly distributed broken wires in one rope lay.

5. If you see my indication of a problem during a lift, what is the FIRST action you should take?. Notify your supervisor. Contact lift director for guidance. Continue the lift with caution. Stop the operation.

6. Which of the following sling types are acceptable to suspend a personnel platform?. Dedicated wire rope bridle. Grade 70 chain bridle. Dedicated synthetic web bridle. Fiber rope bridle.

7. According to OSHA, what shall be done to a deformed shackle?. De-rated by 50%. Heat treated. Removed from service. Straightened by a qualified person.

8. What action MUST be taken when a polyester synthetic round sling has a tear in its cover, exposing load-hearing core yarns?. Repair the cover temporarily. Get a qualified person to inspect the sling and its tag. Remove the sling from service. Continue to use if no core yarns are visibly cut.

9. What should all rigging slings in use be protected from?. Sharp corners. Angular tension. Static loading. Heavy rain.

10. When loading a shouldered eyebolt at an angle, from what direction should the force be applied?. In place of the eye. Does not matter. Perpendicular to the plane of the eye. Ay a 90-degree angle to the load.

11. Who is responsible for daily or shift pre-use inspections of wire rope slings?. Supervisor. User. Crane operator. Lift director.

12. Who would be responsible for controlling load movement using a tag line?. Signal person. Rigger. Lift director. Crane owner.

13. Sorting hooks should be removed from service if the following is present?. No latch present. Throat opened by 3%. Missing rated load identification. 5% wear in the bowl.

14. Which of the following materials weighs the MOST per volume?. Aluminum. Steel. Bronze. Zinc.

15. What causes an INCREASE in the frequency of periodic sling inspections?. Severity of weather conditions. 110-degree ambient temperature. Severity of service conditions. 115-degree ambient temperature.

16. According to ASME, which of the following identification markings is required on a lifting beam that weighs 250 lbs?. Type of metal. Center of gravity. Beam length. Weight of the beam.

17. According to ASME, during the life of any alloy steel chain sling, who is responsible for maintaining the sling identificacion tag?. Manufacturer. User. Periodic inspector. Rigging supplier.

18. Which sling type would be LEAST effective to use if the load is abrasive?. Metal mesh. Chain. Wire rope. Polyester web.

19. When it is necessary to work under a load supported on jacks, which of the following is the BEST practice?. Fully extend the rams. Fully retract the rams. Insert blocking beneath the load. Add additional jacks.

20. What does the lettering “WLL” indicate on a shackle or a hook?. Working load lift. Working lift limit. Working lift load. Working load limit.

21. According to ASME, which of the following meet removal criteria of a hook´s throat opening?. 5% not to exceed ¼ inch. 10% not to exceed ½ inch. 15% not to exceed ½ inch. No stretch is allowed.

22. When placing the eye of a wire rope sling onto a load block hook, the width of the hook MUST be. Greater than ½ the length of the eye. Less then 1/3 the length of the eye. Less than ½ the length of the eye. Less than the length of the eye.

23. What is a reason for removal of shackles?. Use after exposure below 0º F. Use after exposure above 180º F. Excessive pitting or corrosion. 5 % reduction of the original dimension at any point.

24. When is a means of secondary restrain required when moving loads with rollers?. Only when ascending an incline. Only when descending an incline. It is not required. It is always required.

25. What should syntotie alings be protected from during storage?. Moderate temperature. Dusty conditions. Dry environment. Ultraviolet light.

26. Sling angles of what degree shall be avoided?. >90º. 45º. 60º. <30º.

27. While placing a sling on a hook, what should the user do if the identification tag of a synthetic round sling is NOT legible?. Remove from service after lift. Consult with lift director. Refer to sling color for capacity. Remove sling from service.

28. What is the MINIMUM diameter wire-rope sling required to lift a 5,000 lbs. pipe with a single choker hitch?. ½ inch. 5/8 inch. ¾ inch. 7/8 inch.

29. What should be done when releasing a lever chain chain binder?. Use a cheater. Stand above binder. Leave handle in tap position. Use pry bar under handle.

30. What method for selecting sling leg length will ensure 60-degreee sling angles for a two-point lift?. Distance between attachment point divided by 2 = sling leg length. Distance between attachment point divided by 1.76 = sling leg length. Distance between attachment points = sling leg length. Distance between attachment point x 2 = sling leg length.

31. What is the MAXUMUM included angle when two slings are placed on a hook?. 45 degrees. 90 degrees. 120 degrees. 135 degrees.

32. When placing the eye of a web sling a load block hook, the width of the hook MUST be which of the following?. Greater then ½ the length of the eye. Greater then 2/3 the length of the eye. Less than 1/3 the length of the eye. Less than the entire length of the eye.

33. What is the BEST knot for securing a tag line through an eye?. Half hitch. Granny. Bowline. Clove hitch.

34. When determining loading on a rigging block, what is the line pull multiplied by?. D/d ratio. Length (L) / height (H). Coefficient of friction. Block factor.

35. What does an eye bolt marked with ½ - inch embossing indicate?. Half ton working load limit. Diameter of the shank. Diameter of the eye. Length of the shank.

36. Materials used for sling protection shall be made of. Sufficient strength, thickness, and construction. The same material as the sling. Material with twice the WLL of the sling. The same material at the object being rigged.

37. What does improper use of a lever hoist include?. Using a cheater bar. Using at a 60-degree angle. Pulling horizontally. Using as an adjustable leg.

38. What shall you do with a chain-sling with a bent link?. Replace it with a proof-tested mechanical link. Use it at 50% WLL. Remove it from service. Derated by a qualified person.

39. When shall wire rope slings be inspected?. Each shift prior to initial use. During light service. Only during severe service. Weekly during moderate service.

40. What MINIMUM size Polyester round sling is requires to lift a pipe that weighs 9,000 lbs. with one sling using a choker hitch?. Three. Four. Five. Six.

41. What is a reason for removal of a shackle?. Light surface rusting. Missing manufacturer´s name or trade mark. Shallow pitting or minor thread damage. Faded or worn coloring.

42. When installing a shackle with a screw pin, should be. Seated with pin in contact of shackle body. Sented then backed off ¼ turn. Tightened then backed off ½ turn. Loose to prevent binding.

43. How many wire rope clips (u bolt style) are required to form an eye in ½ inch wire rope?. Two. Sharp corners. Four. Five.

44. What is the preferred method for joining together two ropes of unequal diameter?. Square knot. Sheet bend. Clove hitch. Granny knot.

45. What MINIMUM size polyester round sling is required to lift a pipe that weighs 9,000 lbs. with two slings at a 65-degree horizontal angle?. One. Two. Three. Four.

46. What is the MAXIMUM included angle of multiple slings gathered in a master link?. 30 degrees. 60 degrees. 90 degrees. 120 degrees.

47. Which of the following is an improper use of a shackle?. A screw pin shackle with bow in eye of sling on choker hitch. A bolt type shackle in long term application. A screw pin shackle with pin secured in long-term application. Multiple slings placed in the bow of shackle.

48. According to the Rigger Booklet, what MINIMUM size grade 80 chain sling is required to lift a 5,000-pound load using a straight-line hitch?. 9/32 inch. 3/8 inch. ½ inch. 5/8 inch.

49. According to the Rigger Reference Booklet, what is the capacity of a four-leg chain sling (5/8”- grade 80) if only two legs are used at a 60-degree anlge of loading?. 18,100 lbs. 25,600 lbs. 31,300 lbs. 47,000 lbs.

50. What causes degradation to synthetic web slings?. Sunlight. [-] 20-degree temperature. Moisture. 112-degree temperature.

51. When making a turn-back eye using U-bolt clips, where should the saddle be applied?. Depends on diameter of the wire rope. Dead end of the wire rope. Live end of the wire rope. Between the live end and the dead end of the wire rope.

52. What is the purpose of the hole in the book shown in the illustration?. Sling attachment point. Tagline attachment point. Shackle pin attachment point. Overhaul weight attachment point.

53. What shall you dop when a sling has been identified as a potential hazard?. Remove it at end of shift. Inspect it more frequently. Remove it from service. Notify the supervisor.

54. What potential hazard might be created by placing blocking underneath a load using your hands?. Point load. Pinch point. Unstable load. Unstable ground.

55. According to ASME, which of the following type of slings require the core material to be listed on the identification tag?. Wire rope slings. Cable laid slings. Matel mesh slings. Synthetic round slings.

56. How MUST swivel hoist rings be used?. With a shim to ensure alignment. Torqued to manufacturer’s specifications. Only used on vertical lifts. Only used on steel objects.

57. According to ASME, what is the CORRECT method of fully seat the wedge socket?. Apply a shock load. Remove wire rope slack. Strike with hammer. Apply an adequate load.

58. Which of the following are the removal criteria when inspecting a mechanical ratcheting jack before each shift? i. Cracked or broken rack teeth ii. Leaking hydraulic fluid iii. Excessive wear of the pawl and rack iv. Relief valve damage. A. I and III. B. I and IV. C. II and III. D. II and IV.

59. Which type of sling allows an object ½ the length of the eye to be placed in the eye?. Chain. Synthetic web. Synthetic round. Wire rope.

60. According to ASME, when shall slings be inspected?. When new. When used in high humidity. After use on barges. Before use in a knot configuration.