NCCCO LATTICE BOOM GENERAL KNOWLEDGE UPDATED
QUESTIONS AND ANSWERS
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
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? - CORRECT
ANSWER✅✅✅2 feet
According to ASME B30.5 a fire extinguisher shall have a rating of __________ and shall be available at
all operator's stations or cabs of the equipment. - CORRECT ANSWER✅✅✅10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be inserted; - CORRECT
ANSWER✅✅✅First
QUESTIONS AND ANSWERS
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
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? - CORRECT
ANSWER✅✅✅2 feet
According to ASME B30.5 a fire extinguisher shall have a rating of __________ and shall be available at
all operator's stations or cabs of the equipment. - CORRECT ANSWER✅✅✅10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be inserted; - CORRECT
ANSWER✅✅✅First
