QUESTIONS AND ANSWERS 100% CORRECT
⩥ The shaded area on a load chart indicates _______? Answer: A
structural chart
⩥ The minimum distance to a power line of unknown voltage is ?
Answer: 50'
⩥ When hoisting personnel and have known voltage, can you use Table
A and get closer than 20'? Answer: Never!
⩥ What is the minimum tale swing clearance requirement Answer: 2'
⩥ What kind of rigger is required for A/D? Answer: Qualified Rigger
⩥ Signal training is now required in the construction industry, True or
False? Answer: True
⩥ What is the weight of the object being lifted called? Answer: Net Load
⩥ Why are the edges of a man basket smooth? Answer: To protect
against injury
,⩥ Man basket doors must swing which way? Answer: Must swing
inwards only
⩥ Name a few things to inspect for with synthetic slings Answer:
Missing tags, acid burns, broken stitches, melting, snags, tears, cuts,
discoloration
⩥ What should never be done while inspecting a wire rope? Answer:
Open it to expose the core
⩥ A few things to be checked for in a wire rope inspection are Answer:
Corrosion, crushed strands, bird caging, high stranding, core protrusion,
damaged end fittings, heat damage from any source
⩥ If the horizontal sling angle decreases, the rated capacity Answer:
Decreases
⩥ How much does concrete weigh per cubic foot? Answer: 150 lbs.
⩥ When making a lift in excess of 75% of rated capacity, this would be
considered a ? Answer: Critical lift
⩥ All lifting devices are load tested to how much? Answer: 125%
,⩥ How many people signal the cranes on a 2 crane pick? Answer: 1
⩥ On a multi crane pick, each crane should be loaded to no more than
what percentage of its rated capacity? Answer: 75%
⩥ The highest cause of fatalities in crane accidents is ? Answer:
Electrocution
⩥ What is a C rated fire extinguisher used for? Answer: Electrical fires,
anything to do with CURRENT
⩥ The weight of a stationary load is called ? Answer: Static load
⩥ What will a properly configured LMI indicate? Answer: Potential
Overload
⩥ New signals must be ? Answer: Equally effective
⩥ The minimum distance to pass below power lines with no load and the
crane in its transport configuration is ...? Answer: 4'
, ⩥ A crane operator must be certified for the _____ and ______ of the
crane they will operate Answer: Type and capacity
⩥ What is the horizontal distance from the center of rotation to the
center of the suspended load called? Answer: Load radius
⩥ A jib is primarily used for ? Answer: Height
⩥ What is the principle of leverage? Answer: Weight x distance =
distance x weight
⩥ Whats the formula to find the estimated weight of a square object
Answer: length x width x height x unit weight
⩥ What happens to the rated capacity at a given radius when handling
personnel? Answer: It is de-rated 50%
⩥ The first thing done on site when lifting personnel is ? Answer: A pre-
lift meeting
⩥ A critical lift would be in excess of what percentage of rated capacity?
Answer: 75%