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Lattice Boom Crane Review Questions with correct answers.
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Lattice Boom Crane Review Questions with correct answers.
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Lattice Boom Crane Review Questions with correctanswers
On lattice boom cranes with power load lowering mounted on the hoist,
a heavy load should be lowered by; Correct Answer-Power load
lowering feature and the foot brake
A pin-connected lattice boom is being dismantled. After connecting the
equalizer(bridle) to the connecting lugs on the boom butt, which boom
connecting pins should be removed first? Correct Answer-Lower
connection pins, located ahead of the equalizer
Using a mobile crane on a barge, the cranes load capacity ratings will
be? Correct Answer-replaced by a list chart
How many broken wires are permitted at the end connection of a
standing pendant line before it must be taken out of service? Correct
Answer-1
When assembling a lattice boom on a mobile crane and using inserts of
different lengths, which insert section should be closest to the boom butt
section? Correct Answer-10 ft
Backward stability of a mobile crane is tested in which configuration?
Correct Answer-Basic boom at maximum angle with no load
, Boom hoist limiting device Correct Answer-the device that stops the
boom when it nears the cranes maximum angle
Jib Offset Correct Answer-jib angle to the broom
Cantilever Lenght Correct Answer-Amount of lattice boom to be
suspended out past the connection point of the pendants during
assembly/disassembly of the boom.
Master Clutch Correct Answer-Majority of the friction style mobile
cranes the power is transferred to the torque converter via master clutch
When lattice boom is being dismantled it's important to? Correct
Answer-Never touch any pin on any boom section located b/t the
pendant attachment points and the crane
When swinging a suspended load on any lattice boom crane, the most
ground pressure will be exerted over which position? Correct Answer-
corner
The main boom length is measured from the...? Correct Answer-center
of the heel pins to the center of the tip sheave pins
What position should the gantry of a LBC be when hoisting a suspended
load? Correct Answer-Highest postition
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