NCCCO Lattice Boom General Knowledge 100% Correct Answers Verified Latest 2024 Version
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NCCCO Lattice Boom General Knowledge |
100% Correct Answers | Verified | Latest
2024 Version
The lattice boom is designed to take winds of up to 20 mph. from the side plus a full rated load, plus a
direct side load equal to what percent of the rated load? - 2%
The part of the load chart govern...
NCCCO Lattice Boom General Knowledge |
100% Correct Answers | Verified | Latest
2024 Version
The lattice boom is designed to take winds of up to 20 mph. from the side plus a full rated load, plus a
direct side load equal to what percent of the rated load? - ✔✔2%
The part of the load chart governed by stability is based on what percentage of capacity while a crawler
crane is working over the side quadrant? - ✔✔A. 75%
The most unstable working quadrant for a crawler crane is the; - ✔✔Side
What type of capacity is listed on a crane load chart? - ✔✔Static
If the manufacture of a particular crane does not specifically permit pick and carry operations what
procedure must be followed during this operation? - ✔✔Don't make any pick and carry lifts
What is the main purpose of a jib/extension? - ✔✔To extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. - ✔✔Decreases
When handling boom sections, the best place for slings to be attached is; - ✔✔At the pin connections at
the ends of the top chords
Placing timber blocking under the tips of the tracks on a crawler crane will; - ✔✔Make the crane more
stable
What is the major effect of stopping suddenly a rapid swing while operating long boom crane? -
✔✔Action may cause the crane boom collapse and/or overturn the crane
, According to B30.10 hooks shall be removed from service when the throat opening exceeds _____ the
original throat opening. - ✔✔5%
On a crawler crane ground bearing pressure is greatest where? - ✔✔Over the corner
During disassembly of a long boom, the pendant lines are connected at the maximum cantilever point
and the boom is slightly lifted off the ground, which boom connection pins are to be removed next? -
✔✔The bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind speed reaches; -
✔✔20 mph
The definition of cantilever of a lattice boom crane is; - ✔✔The boom suspended past the pendant
connections
What chart do you use when operating a crane on a barge; - ✔✔List chart
According to OSHA, Jibs must have a positive ________ from backwards overturning - ✔✔Stop
Mobile cranes on barges shall be - ✔✔Physically attached to the barge
When a crane is properly barricaded, what is the clearance required all the way around 360 degrees
between the superstructure and the barricade when swung 360 degrees? - ✔✔2 feet
According to ASME B30.5 a fire extinguisher shall have a rating of __________ and shall be available at
all operator's stations or cabs of the equipment. - ✔✔10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be inserted; - ✔✔First
Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope diameter. -
✔✔16 times
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