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NCCCO Lattice Boom General Knowledge
Exam Questions Complete Solutions Current
Update (A+ Pass)
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? - Answer✔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? - Answer✔A. 75%
The most unstable working quadrant for a crawler crane is the; - Answer✔Side
What type of capacity is listed on a crane load chart? - Answer✔Static
If the manufacture of a particular crane does not specifically permit pick and carry operations
what procedure must be followed during this operation? - Answer✔Don't make any pick and
carry lifts
What is the main purpose of a jib/extension? - Answer✔To extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. -
Answer✔Decreases
When handling boom sections, the best place for slings to be attached is; - Answer✔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; - Answer✔Make the
crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom crane? -
Answer✔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. - Answer✔5%
On a crawler crane ground bearing pressure is greatest where? - Answer✔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? - Answer✔The bottom pins ahead of the cantilever point
1
NCCCO Lattice Boom General Knowledge
Exam Questions Complete Solutions Current
Update (A+ Pass)
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? - Answer✔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? - Answer✔A. 75%
The most unstable working quadrant for a crawler crane is the; - Answer✔Side
What type of capacity is listed on a crane load chart? - Answer✔Static
If the manufacture of a particular crane does not specifically permit pick and carry operations
what procedure must be followed during this operation? - Answer✔Don't make any pick and
carry lifts
What is the main purpose of a jib/extension? - Answer✔To extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. -
Answer✔Decreases
When handling boom sections, the best place for slings to be attached is; - Answer✔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; - Answer✔Make the
crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom crane? -
Answer✔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. - Answer✔5%
On a crawler crane ground bearing pressure is greatest where? - Answer✔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? - Answer✔The bottom pins ahead of the cantilever point
1
