NCCCO Lattice Boom General Knowledge Correct
Questions & 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%
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
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
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
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. - ANSWER10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be inserted; -
ANSWERFirst
Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope
diameter. - ANSWER16 times
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
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? - ANSWER2 feet
Questions & 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%
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
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
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
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. - ANSWER10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be inserted; -
ANSWERFirst
Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope
diameter. - ANSWER16 times
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
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? - ANSWER2 feet
