NCCCO Lattice Boom General
Knowledge
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
Knowledge
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
