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1 of
61
Term
The term "Upperworks" or "Superstructure" refer to the area of the
crane:
above the turntable
below the turntable
in front of the boom
behind the boom
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, over the corner center of roatation
boom extension above the turntable
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2 of 61
Term
What is the purpose of using a Jib:
a) increase load radius
b) decrease load radius
c) increase height
d) decrease height
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increase height Upperworks
50% of design over the corner
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3 of 61
Term
If a lattice boom truck crane is going to perform work over
the front it must have:
, a) a second signal person stationed over the front of the
crane
b) a short boom incapable of tipping the crane
c) a front mounted counterweight to prevent tipping in that
area
d) a load chart stating capacities in that area
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secured to the outriggers closer to the tipping axis
point where the outriggers a load chart stating
touch the ground capacities in that area
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4 of 61
Term
Why is the primary reason for using a boom extension:
a) increase load radius
b) decrease load radius
c) increase height
d) increase reach
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increase height over the corner
, the front increase stability
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5 of 61
Term
Load radius is the distance from the center of gravity of
the suspended load to the:
a) center of rotation
b) center of gravity of the crane
c) tipping axis
d) hook rollers
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loss of stability lift over the side
over the corner center of roatation
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6 of 61
Term
Truck crane capacities are usually greater over the:
a) front