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Exam
Question 1. Which individual is primarily responsible for confirming that the load weight does not exceed the crane’s rated capacity? A) Rigger B) Lift Director C) Crane Operator D) Signalperson Answer: B Explanation: The Lift Director reviews load data, ensures the crane’s capacity chart matches the load weight, and authorizes the lift. Question 2. Under 29 CFR 1926.1400, which of the following is NOT a required component of a crane’s safety program? A) Daily equipment inspection B) Operator certification C) Mandatory overtime limits D) Written lift plans for critical lifts Answer: C Explanation: Overtime limits are not mandated by the crane safety regulations; the other items are required. Question 3. According to ASME B30.5, what color must high‑visibility apparel be for daytime crane operations? A) Fluorescent orange B) Bright yellow with reflective tape C) Neon green D) All of the above are acceptable Answer: B Explanation: The standard specifies bright yellow with reflective tape as the minimum for daytime visibility.
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Question 4. When identifying a pinch‑point hazard, which condition is most critical to mitigate? A) Proximity to overhead power lines B) Movement of two components toward each other C) Presence of oily surfaces D) Low ambient temperature Answer: B Explanation: Pinch points occur when two moving parts converge, creating a crushing risk. Question 5. During site evaluation, which ground condition would most likely require the use of a crane mat? A) Compacted sand with a bearing capacity of 150 psf B) Soft clay with a bearing capacity of 30 psf C) Dry, granular soil with 200 psf bearing capacity D) Concrete slab with 300 psf bearing capacity Answer: B Explanation: Soft clay’s low bearing capacity necessitates a crane mat to distribute loads. Question 6. Which of the following slings is NOT suitable for lifting hot steel at temperatures above 250 °C? A) Wire rope sling – standard B) Synthetic web sling – polyester C) Alloy steel chain sling – Grade 80 D) Metal mesh sling – stainless steel Answer: B Explanation: Polyester web slings degrade rapidly at high temperatures; the others can tolerate heat. Question 7. A wire rope sling marked “10 mm × 6 mm × 12 mm” indicates which characteristic? A) Length, diameter, and construction type B) Nominal diameter, construction type, and breaking strength
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Explanation: Anchor‑type shackles are designed for chain connections; screw‑pin provides quick release. Question 11. When selecting a turnbuckle for load tensioning, the primary factor to consider is: A) Length of the turnbuckle body B) Thread pitch and material grade C) Color of the turnbuckle housing D) Number of holes in the end fittings Answer: B Explanation: Thread pitch determines the amount of tension per rotation; material grade ensures strength. Question 12. The correct torque for a standard ½‑inch bolt‑type shackle is: A) 5 Nm B) 10 Nm C) 15 Nm D) 20 Nm Answer: B Explanation: ASME B30.9 specifies a torque of 10 Nm for ½‑inch bolt‑type shackles. Question 13. Which hardware is specifically designed to equalize load among multiple slings? A) Hook B) Spreader bar C) Eye bolt D) Turnbuckle Answer: B Explanation: A spreader bar distributes load evenly across the attached slings. Question 14. During a pre‑use inspection of a wire rope clip, which condition is acceptable?
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A) Slight deformation of the U‑bolt B) Missing safety lock washer C) One burr on the clip’s eye D) All of the above are unacceptable Answer: D Explanation: Any deformation, missing parts, or burrs compromise the clip’s performance and must be rejected. Question 15. According to ASME B30.26, how often must alloy steel chain slings undergo a full annual inspection? A) Every 3 years B) Every 2 years C) Annually D) Every 5 years Answer: C Explanation: The standard requires a comprehensive inspection at least once per year. Question 16. When calculating the weight of a concrete block, which density value is most appropriate? A) 2,200 kg/m³ B) 2,400 kg/m³ C) 2,600 kg/m³ D) 2,800 kg/m³ Answer: B Explanation: Standard reinforced concrete has an approximate density of 2,400 kg/m³. Question 17. The center of gravity (CG) of a uniform rectangular steel plate is located: A) At the geometric center of the plate B) 10 cm from the nearest edge
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B) 13 200 lb C) 13 800 lb D) 14 400 lb Answer: C Explanation: Total loss = 2 × 5 % = 10 %; required winch force = 12 000 lb ÷ (1 – 0.10) = 13 333 lb ≈ 13 800 lb (rounded to nearest option). Question 21. In a load inversion (180° flip), which of the following is the first critical step? A) Securing the load with a single central sling B) Determining the new pick points after inversion C) Removing all rigging before the flip D) Positioning a spreader bar beneath the load Answer: B Explanation: Planning new pick points ensures the load remains balanced during and after inversion. Question 22. Drifting a load horizontally between two cranes requires which of the following to maintain load stability? A) Identical crane capacities only B) Synchronized hoist speeds and tension monitoring C) Use of a single hoist line only D) No communication between crane operators Answer: B Explanation: Coordinated hoist speeds and continuous tension checks prevent load swing. Question 23. When performing a multi‑crane lift, the primary purpose of a “lift master” is to: A) Operate the larger crane B) Ensure both cranes lift at the same rate and share load equally C) Tie down the load after lift D) Conduct daily equipment inspections only
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Answer: B Explanation: The lift master coordinates the operation, synchronizing hoists to balance the load. Question 24. The coefficient of friction between steel on steel (dry) is approximately: A) 0. B) 0. C) 0. D) 0. Answer: C Explanation: Dry steel on steel typically has a coefficient of friction around 0.30. Question 25. A block and tackle system with a 4:1 mechanical advantage reduces the required input force to: A) 25 % of the load weight B) 33 % of the load weight C) 50 % of the load weight D) 75 % of the load weight Answer: A Explanation: Mechanical advantage of 4 means input force = load / 4 = 25 % of load. Question 26. Which hand signal indicates “lower the load” for an overhead crane? A) Palm facing up, moving downward B) Palm facing down, moving upward C) Closed fist moving forward D) Open hand moving sideways Answer: A Explanation: OSHA hand signal for “lower” is palm up, moving the arm downwards.
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C) A red arrow pointing upward D) A shaded area covering the entire load surface Answer: A Explanation: Standard drawings use a solid circle with crosshair to denote the exact pick point. Question 31. Which wind speed limit is commonly applied for crane operations without a wind‑monitoring system? A) 15 mph (24 km/h) B) 20 mph (32 km/h) C) 25 mph (40 km/h) D) 30 mph (48 km/h) Answer: B Explanation: Many standards set 20 mph as the maximum allowable wind speed absent monitoring equipment. Question 32. The primary purpose of a “load chart” in crane operation is to: A) Record daily maintenance logs B) Provide the relationship between load weight, boom length, and radius C) List all rigging hardware inventory D) Show the crane’s fuel consumption rates Answer: B Explanation: Load charts correlate load weight with boom extension and radius to ensure safe operation. Question 33. Which PPE item protects a rigger from hand injuries when handling chain slings? A) Safety glasses B) Leather gauntleted gloves C) Steel‑toe boots D) High‑visibility vest
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Answer: B Explanation: Leather gauntleted gloves protect against cuts and abrasions from chain hardware. Question 34. The minimum clearance distance from a 13.8 kV power line for a crane boom is: A) 6 ft (1.8 m) B) 10 ft (3 m) C) 12 ft (3.6 m) D) 15 ft (4.5 m) Answer: C Explanation: OSHA requires a minimum of 12 ft clearance from 13.8 kV lines. Question 35. During a site survey, an underground gas pipe is discovered 1 m below the planned crane footprint. The appropriate action is to: A) Proceed, as the pipe can bear the load B) Use a crane mat to distribute load over a larger area C) Relocate the lift point away from the pipe location D) Increase the crane’s counterweight Answer: C Explanation: Lifting over a gas pipe risks rupture; the lift point must be moved. Question 36. Which of the following is NOT a permissible method for inspecting a synthetic web sling? A) Visual inspection under bright light B) Tapping with a hammer to detect internal defects C) Checking for cuts, burns, and abrasion D) Measuring elongation under load Answer: B Explanation: Tapping can cause damage and does not reveal internal defects; it is not an approved method.
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A) Visual check for oil leaks only B) Full load test to 100 % rated capacity C) Measurement of drum diameter wear and gear tooth condition D) Replacement of all hoist ropes regardless of condition Answer: C Explanation: ASME requires measurement of drum wear and gear condition during the annual inspection. Question 41. When a load is lifted with a sling angle of 30° from the vertical, the tension increase factor is approximately: A) 1.0 (no increase) B) 1. C) 1. D) 1. Answer: C Explanation: Tension factor = 1 ÷ cos θ; cos 30° ≈ 0.866, so factor ≈ 1.15. Wait, 1 ÷ 0.866 ≈ 1.15, not 1.33. Therefore correct answer is B. Answer: B Explanation: The tension increase is 1 ÷ cos 30° ≈ 1.15, meaning a 15 % increase over the vertical load. Question 42. A “load chart” for a mobile crane shows a maximum radius of 20 ft for a 10 000 lb load at 30 ft boom length. If the boom is extended to 40 ft, the maximum allowable load at the same radius is: A) 5 000 lb B) 7 500 lb C) 10 000 lb (unchanged) D) 12 500 lb Answer: A Explanation: Extending the boom reduces capacity; typically capacity halves when boom length doubles, so 5 000 lb is the safe limit.
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Question 43. Which of the following best describes the “swing radius” of a lifted load? A) The distance from the load’s center of gravity to the crane’s base B) The horizontal distance the load can travel while suspended C) The radius of the crane’s turntable D) The length of the sling from hook to load Answer: B Explanation: Swing radius is the horizontal arc the load can describe while suspended. Question 44. In a multi‑crane lift, the “shared load point” must be located: A) Directly above the ground anchor point B) At the geometric center of the combined crane footprints C) At a point where each crane’s line of action passes through its own center of gravity D) At a location where the load’s CG aligns with the combined resultant force vector Answer: D Explanation: The shared point must align the load’s CG with the resultant of all crane forces for equilibrium. Question 45. Which of the following is the correct order of steps for a “drift” operation? A) Attach load → Raise → Move horizontally → Lower → Detach B) Raise load → Attach secondary hoist → Move horizontally → Lower → Detach secondary hoist C) Attach secondary hoist → Raise load → Transfer → Lower → Detach both D) Raise load → Move horizontally → Attach secondary hoist → Lower → Detach primary hoist Answer: B Explanation: The load is first raised, then a secondary hoist is attached to move it horizontally, after which it is lowered and the secondary hoist is detached. Question 46. The OSHA hand signal for “stop” is: A) Palm facing the operator, moving upward
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Answer: C Explanation: The lift plan must contain technical details essential for safe execution. Question 50. When using a synthetic web sling to lift a load with a rough surface, the recommended practice is to: A) Use the sling directly on the load surface B) Place a protective sling protector or pad between sling and load C) Increase the sling’s rated capacity by 20 % D) Switch to a wire rope sling without further assessment Answer: B Explanation: Protectors prevent abrasion and cuts on the synthetic sling. Question 51. The primary hazard when working near overhead power lines is: A) Mechanical impact B) Electrocution due to arc‑flash C) Falling objects D) Noise exposure Answer: B Explanation: Contact with energized lines can cause severe electrocution or arc‑flash injuries. Question 52. Which of the following is the correct method for installing a wire rope clip? A) Two U‑bolts on the same side of the rope B) One U‑bolt and one saddle, with the saddle opposite the U‑bolt C) Two U‑bolts opposite each other, with the rope placed in the groove of the first, then the second, and tightened equally D) A single bolt‑type clip is sufficient Answer: C Explanation: Proper installation requires two U‑bolts opposite each other, tightened equally to avoid rope damage.
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Question 53. In a load calculation, the volume of a cylindrical steel pipe (diameter 0.5 m, length 6 m) is: A) 0.75 m³ B) 1.18 m³ C) 1.57 m³ D) 2.36 m³ Answer: B Explanation: Volume = π × (0.25 m)² × 6 m ≈ 1.18 m³. Question 54. The safety factor for a synthetic web sling under normal conditions is: A) 2: B) 3: C) 4: D) 5: Answer: C Explanation: ASME B30.9 specifies a safety factor of 4 for synthetic slings. Question 55. Which of the following best describes a “pin‑type” shackle? A) A shackle with a removable bolt that threads into the body B) A shackle that uses a straight pin secured by a split pin or safety wire C) A shackle with a hinged latch mechanism D) A shackle designed only for chain attachments Answer: B Explanation: Pin‑type shackles employ a straight pin retained by a split pin or safety wire. Question 56. When a crane is operating on a slope, the additional factor that must be considered is: A) Increased wind speed
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A) 1 ton (2 000 lb) B) 2 ton (4 000 lb) C) 3 ton (6 000 lb) D) 5 ton (10 000 lb) Answer: C Explanation: A sling must have a rating greater than the required SWL; a 3‑ton sling provides a safety margin. Question 60. The primary purpose of a “load‑test” on a newly installed spreader bar is to: A) Verify the bar’s color code matches inventory B) Confirm the bar can support the intended load without deformation C) Measure the bar’s weight for shipping documents D) Ensure the bar fits into the crane’s hook Answer: B Explanation: Load testing demonstrates that the spreader bar can safely bear the specified load. Question 61. Which of the following is a correct interpretation of a “pin‑pull” test for a wire rope? A) Applying a static load equal to 10 % of breaking strength for 30 seconds B) Pulling the rope through a pin to verify smooth movement and absence of crushing C) Measuring the rope’s diameter at the pin connection point D) Checking the pin for corrosion after each use Answer: B Explanation: The pin‑pull test ensures the rope runs smoothly over pins without damage. Question 62. When using a chain sling, the minimum number of links that must be used around a load is: A) One link per 10 inches of load width B) At least three links to distribute load evenly C) One link only, if the load is symmetrical
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D) Two links, regardless of load shape Answer: B Explanation: Using at least three links prevents load concentration and ensures even tension distribution. Question 63. In a “lift‑plan” document, the term “clearance envelope” refers to: A) The area occupied by the crane’s operator cabin B) The three‑dimensional space required for the load to move safely without obstacles C) The distance between the crane’s outriggers and the ground D) The volume of the load itself Answer: B Explanation: Clearance envelope defines the safe space around the load’s path. Question 64. Which of the following best describes the effect of using a longer sling length on load tension, assuming the same lift weight and angle? A) Tension decreases as sling length increases B) Tension remains unchanged; length is irrelevant C) Tension increases due to greater angle deviation D) Tension is affected only by sling material, not length Answer: B Explanation: For a given weight and angle, tension is independent of sling length; only angle matters. Question 65. The correct procedure for de‑energizing a crane near a power line is to: A) Lower the boom to the ground while keeping the crane energized B) Disconnect the crane’s power source and wait at least 30 seconds before moving C) Keep the crane powered but reduce hoist speed to minimum D) Immediately remove the operator from the cab and evacuate the area Answer: B
