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What are the four different types of crane signals? - 🧠 ANSWER ✔✔Hand
Voice
Audible
New
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
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, 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