NCCCO Lattice Boom General Knowledge
question with 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? - -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? - -A.
75%
The most unstable working quadrant for a crawler crane is the; - -Side
What type of capacity is listed on a crane load chart? - -Static
If the manufacture of a particular crane does not specifically permit pick and
carry operations what procedure must be followed during this operation? - -
Don't make any pick and carry lifts
What is the main purpose of a jib/extension? - -To extend reach higher or up
and over
When the number of layers of rope on a drum increase the line
pull___________. - -Decreases
When handling boom sections, the best place for slings to be attached is; - -
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; -
-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating
long boom crane? - -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. - -5%
On a crawler crane ground bearing pressure is greatest where? - -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? - -The bottom pins
ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced
when wind speed reaches; - -20 mph
The definition of cantilever of a lattice boom crane is; - -The boom suspended
past the pendant connections
What chart do you use when operating a crane on a barge; - -List chart
According to OSHA, Jibs must have a positive ________ from backwards
overturning - -Stop
Mobile cranes on barges shall be - -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? - -2 feet
question with 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? - -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? - -A.
75%
The most unstable working quadrant for a crawler crane is the; - -Side
What type of capacity is listed on a crane load chart? - -Static
If the manufacture of a particular crane does not specifically permit pick and
carry operations what procedure must be followed during this operation? - -
Don't make any pick and carry lifts
What is the main purpose of a jib/extension? - -To extend reach higher or up
and over
When the number of layers of rope on a drum increase the line
pull___________. - -Decreases
When handling boom sections, the best place for slings to be attached is; - -
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; -
-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating
long boom crane? - -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. - -5%
On a crawler crane ground bearing pressure is greatest where? - -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? - -The bottom pins
ahead of the cantilever point
Most crane manufactures require the load chart capacities must be reduced
when wind speed reaches; - -20 mph
The definition of cantilever of a lattice boom crane is; - -The boom suspended
past the pendant connections
What chart do you use when operating a crane on a barge; - -List chart
According to OSHA, Jibs must have a positive ________ from backwards
overturning - -Stop
Mobile cranes on barges shall be - -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? - -2 feet
