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