NCCCO Lattice Boom General Knowledge Exam
Questions with Verified 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
The definition of cantilever of a lattice boom crane is; - correct answer -The
boom suspended past the pendant connections
Most crane manufactures require the load chart capacities must be reduced
when wind speed reaches; - correct answer -20 mph
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
Block hoisting sheaves should have a minimum pitch diameter of at
least________ the rope diameter. - correct answer -16 times
What is the correct method of checking the brakes of crane that has been
already assembled? - correct answer -Lift the load a few inches off the
ground and apply the brakes
Questions with Verified 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
The definition of cantilever of a lattice boom crane is; - correct answer -The
boom suspended past the pendant connections
Most crane manufactures require the load chart capacities must be reduced
when wind speed reaches; - correct answer -20 mph
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
Block hoisting sheaves should have a minimum pitch diameter of at
least________ the rope diameter. - correct answer -16 times
What is the correct method of checking the brakes of crane that has been
already assembled? - correct answer -Lift the load a few inches off the
ground and apply the brakes
