NCCCO Lattice Boom General Knowledge
(2025/2026) Questions with Correct
Answers | Rated A+
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? - Answer2%
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? - AnswerA. 75%
The most unstable working quadrant for a crawler crane is the; - AnswerSide
What type of capacity is listed on a crane load chart? - AnswerStatic
If the manufacture of a particular crane does not specifically permit pick and carry
operations what procedure must be followed during this operation? - AnswerDon't make
any pick and carry lifts
What is the main purpose of a jib/extension? - AnswerTo extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. -
AnswerDecreases
, When handling boom sections, the best place for slings to be attached is; - AnswerAt the pin
connections at the ends of the top chords
Placing timber blocking under the tips of the tracks on a crawler crane will; - AnswerMake
the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane? - AnswerAction 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. - Answer5%
On a crawler crane ground bearing pressure is greatest where? - AnswerOver 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? - AnswerThe bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind
speed reaches; - Answer20 mph
The definition of cantilever of a lattice boom crane is; - AnswerThe boom suspended past
the pendant connections
What chart do you use when operating a crane on a barge; - AnswerList chart
According to OSHA, Jibs must have a positive ________ from backwards overturning -
AnswerStop
Mobile cranes on barges shall be - AnswerPhysically attached to the barge
(2025/2026) Questions with Correct
Answers | Rated A+
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? - Answer2%
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? - AnswerA. 75%
The most unstable working quadrant for a crawler crane is the; - AnswerSide
What type of capacity is listed on a crane load chart? - AnswerStatic
If the manufacture of a particular crane does not specifically permit pick and carry
operations what procedure must be followed during this operation? - AnswerDon't make
any pick and carry lifts
What is the main purpose of a jib/extension? - AnswerTo extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. -
AnswerDecreases
, When handling boom sections, the best place for slings to be attached is; - AnswerAt the pin
connections at the ends of the top chords
Placing timber blocking under the tips of the tracks on a crawler crane will; - AnswerMake
the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane? - AnswerAction 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. - Answer5%
On a crawler crane ground bearing pressure is greatest where? - AnswerOver 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? - AnswerThe bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind
speed reaches; - Answer20 mph
The definition of cantilever of a lattice boom crane is; - AnswerThe boom suspended past
the pendant connections
What chart do you use when operating a crane on a barge; - AnswerList chart
According to OSHA, Jibs must have a positive ________ from backwards overturning -
AnswerStop
Mobile cranes on barges shall be - AnswerPhysically attached to the barge
