How much do you already know about how to safely operate a crane?

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– Step 1 of 5

Section 1: General Safety & Regulatory Standards

1. What is the OSHA standard for cranes and the construction industry? *

• OSHA 1910.180
• OSHA 1926.1400
• OSHA 1926.55
• OSHA 1910.269

2. According to OSHA 1926.1412, how often must a competent person perform a crane inspection? *

• Daily (each shift)
• Weekly
• Monthly
• Annually

3. Per industry standards, what size of fire extinguisher is required on a crane? *

• 2-lb BC
• 5-lb ABC
• 10-lb ABC
• 20-lb BC

4. Which hand signal must be obeyed at all times? *

• Hoist
• Swing
• Emergency Stop
• Lower Boom

5. Per ANSI B30.5, when operating a crane near high voltage lines of 250 KV, what is the minimum clearance? *

• 10 feet
• 15 feet
• 20 feet
• 25 feet

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6. Man baskets are proof-tested to what percentage of their rated capacity? *

• 100%
• 125%
• 150%
• 90%

Next

Section 2: Load Charts & Capacity

7. The load chart is matched to a specific crane by what identifier? *

• Model number only
• Serial number
• Boom length
• Year of manufacture

8. Crane capacities listed above the bold line on a load chart are based on: *

• Tipping/Stability
• Structural strength
• Hydraulic pressure
• Counterweight mass

9. How is the net capacity of a lift determined? *

• Gross capacity minus the weight of the load
• Weight of the load plus rigging
• Gross capacity minus deductions (rigging, block, etc.)
• Weight of the crane minus the load

10. Unless stated otherwise, jib capacities are generally determined by: *

• Stability
• Structural strength
• The angle of the main boom
• The weight of the main block

11. When may a crane be legally overloaded? *

• Never
• During a proof-load test (only under controlled, authorized testing)
• If the supervisor authorizes it
• If the load is less than 5% over capacity

Next

Section 3: Rigging & Hardware

12. How do you identify the Working Load Limit (WLL) on rigging slings? *

• By the color of the sling
• By measuring the thickness
• By checking the permanently attached identification tag
• By checking the crane’s load chart

13. Identify the three basic rigging hitches from strongest to weakest: *

• Choker, Vertical, Basket
• Basket, Vertical, Choker
• Vertical, Basket, Choker
• Basket, Choker, Vertical

14. What is the safety design factor for wire rope slings? *

• 3:1
• 5:1
• 7:1
• 10:1

15. What is the safety design factor for regular running ropes? *

• 3:1
• 3.5:1
• 5:1
• 10:1

16. Crane hooks must not be twisted in excess of how many degrees? *

• 0°
• 5°
• 10°
• 45°

Next

Section 4: Articulating (Knuckleboom) Specifics

17. What is the primary function of a Load Moment Limiter (LML) on an articulating crane? *

• To speed up the winch
• To prevent the crane from exceeding its rated capacity
• To measure the wind speed
• To level the outriggers automatically

18. If an articulating crane fails to lift a load within its chart, what is usually the limiting factor? *

• Engine horsepower
• Cable thickness
• Hydraulic pressure / Relief valve settings
• Counterweight size

19. True/False: An articulating crane's capacity is the same regardless of how many extensions are deployed, as long as the radius is the same. *

• True
• False (Extensions add weight/deductions that affect capacity)

20. How does the position of the inner/main boom affect the capacity of the outer/knuckle boom? *

• It has no effect
• It changes the leverage and geometry available to the outer boom
• It only affects the swing speed
• It only affects the weight of the outriggers

21. Why is the 'Outer Boom' angle important when making a lift near maximum capacity? *

• It determines the color of the LML light
• It affects the structural integrity and the effective lifting capacity
• It is only used for calculating travel height
• It prevents the truck from tipping backward

Next

Section 5: Operational Physics & Math

22. You plan to pick a load weighing 47,000 lbs. If your line pull is 9,600 lbs, how many parts of line will you need? *

• 3
• 4
• 5
• 6

23. How does boom deflection affect the load radius? *

• It decreases the radius
• It increases the radius
• It has no effect on radius
• It only affects boom angle

24. On any crane, where is the ground bearing pressure greatest? *

• Under the counterweight
• Evenly across all outriggers
• Under the outrigger or tire closest to the load
• Directly under the center pin

25. Where is the most "unstable" area for a truck-mounted articulating crane? *

• Over the rear
• Directly above the boom rest
• Over the side
• Over the front (cab)

26. With the hook at the extreme low position, how many wraps of rope must remain on the load hoist drum? *

• 1
• 2
• 3
• 5

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