NCCCO Lattice Boom General Knowledge Reviewed
Questions With Verified Answers
Placing timber blocking under the tips of the tracks on a crawler crane will;☑️Correct Ans-
Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane?☑️Correct Ans-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 Ans-5%
On a crawler crane ground bearing pressure is greatest where?☑️Correct Ans-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 Ans-The bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind speed
reaches;☑️Correct Ans-20 mph
The definition of cantilever of a lattice boom crane is;☑️Correct Ans-The boom suspended past
the pendant connections
, What chart do you use when operating a crane on a barge;☑️Correct Ans-List chart
According to OSHA, Jibs must have a positive ________ from backwards
overturning☑️Correct Ans-Stop
Mobile cranes on barges shall be☑️Correct Ans-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 Ans-
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 Ans-10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be
inserted;☑️Correct Ans-First
Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope
diameter.☑️Correct Ans-16 times
What is the correct method of checking the brakes of crane that has been already
assembled?☑️Correct Ans-Lift the load a few inches off the ground and apply the brakes
Questions With Verified Answers
Placing timber blocking under the tips of the tracks on a crawler crane will;☑️Correct Ans-
Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane?☑️Correct Ans-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 Ans-5%
On a crawler crane ground bearing pressure is greatest where?☑️Correct Ans-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 Ans-The bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when wind speed
reaches;☑️Correct Ans-20 mph
The definition of cantilever of a lattice boom crane is;☑️Correct Ans-The boom suspended past
the pendant connections
, What chart do you use when operating a crane on a barge;☑️Correct Ans-List chart
According to OSHA, Jibs must have a positive ________ from backwards
overturning☑️Correct Ans-Stop
Mobile cranes on barges shall be☑️Correct Ans-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 Ans-
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 Ans-10 BC or higher
When assembling a lattice boom crane the top pins of the boom sections should be
inserted;☑️Correct Ans-First
Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope
diameter.☑️Correct Ans-16 times
What is the correct method of checking the brakes of crane that has been already
assembled?☑️Correct Ans-Lift the load a few inches off the ground and apply the brakes
