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? - CORRECT 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? - CORRECT ANSWER -A. 75%
The most unstable working quadrant for a crawler crane is the; - CORRECT ANSWER -Side
What type of capacity is listed on a crane load chart? - CORRECT 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? - CORRECT ANSWER -Don't make any
pick and carry lifts
What is the main purpose of a jib/extension? - CORRECT ANSWER -To extend reach higher or up
and over
When the number of layers of rope on a drum increase the line pull___________. - CORRECT
ANSWER -Decreases
When handling boom sections, the best place for slings to be attached is; - CORRECT 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; - CORRECT ANSWER
-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom crane? -
CORRECT 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. - CORRECT ANSWER -5%
On a crawler crane ground bearing pressure is greatest where? - CORRECT 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? - CORRECT ANSWER -The bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind speed
reaches; - CORRECT ANSWER -20 mph
The definition of cantilever of a lattice boom crane is; - CORRECT ANSWER -The boom
suspended past the pendant connections
What chart do you use when operating a crane on a barge; - CORRECT ANSWER -List chart
According to OSHA, Jibs must have a positive ________ from backwards overturning - CORRECT
ANSWER -Stop
Mobile cranes on barges shall be - CORRECT ANSWER -Physically attached to the barge
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? - CORRECT 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? - CORRECT ANSWER -A. 75%
The most unstable working quadrant for a crawler crane is the; - CORRECT ANSWER -Side
What type of capacity is listed on a crane load chart? - CORRECT 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? - CORRECT ANSWER -Don't make any
pick and carry lifts
What is the main purpose of a jib/extension? - CORRECT ANSWER -To extend reach higher or up
and over
When the number of layers of rope on a drum increase the line pull___________. - CORRECT
ANSWER -Decreases
When handling boom sections, the best place for slings to be attached is; - CORRECT 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; - CORRECT ANSWER
-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom crane? -
CORRECT 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. - CORRECT ANSWER -5%
On a crawler crane ground bearing pressure is greatest where? - CORRECT 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? - CORRECT ANSWER -The bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind speed
reaches; - CORRECT ANSWER -20 mph
The definition of cantilever of a lattice boom crane is; - CORRECT ANSWER -The boom
suspended past the pendant connections
What chart do you use when operating a crane on a barge; - CORRECT ANSWER -List chart
According to OSHA, Jibs must have a positive ________ from backwards overturning - CORRECT
ANSWER -Stop
Mobile cranes on barges shall be - CORRECT ANSWER -Physically attached to the barge
