NCCCO Lattice Boom General Knowledge Exam Latest
2024 Update
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
Most crane manufactures require the load chart capacities must be reduced when
wind speed reaches; - ANSWER>>20 mph
The definition of cantilever of a lattice boom crane is; - ANSWER>>The boom
suspended past the pendant connections
What chart do you use when operating a crane on a barge; - ANSWER>>List chart
According to OSHA, Jibs must have a positive ________ from backwards overturning -
ANSWER>>Stop
Mobile cranes on barges shall be - ANSWER>>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? - ANSWER>>2 feet
2024 Update
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
Most crane manufactures require the load chart capacities must be reduced when
wind speed reaches; - ANSWER>>20 mph
The definition of cantilever of a lattice boom crane is; - ANSWER>>The boom
suspended past the pendant connections
What chart do you use when operating a crane on a barge; - ANSWER>>List chart
According to OSHA, Jibs must have a positive ________ from backwards overturning -
ANSWER>>Stop
Mobile cranes on barges shall be - ANSWER>>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? - ANSWER>>2 feet
