NCCCO LATTICE BOOM GENERAL
KNOWLEDGE EXAM 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? -
ANSWERS2%
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? - ANSWERSA. 75%
The most unstable working quadrant for a crawler crane is the; - ANSWERSSide
What type of capacity is listed on a crane load chart? - ANSWERSStatic
If the manufacture of a particular crane does not specifically permit pick and carry
operations what procedure must be followed during this operation? - ANSWERSDon't
make any pick and carry lifts
What is the main purpose of a jib/extension? - ANSWERSTo extend reach higher or up
and over
When the number of layers of rope on a drum increase the line pull___________. -
ANSWERSDecreases
When handling boom sections, the best place for slings to be attached is; -
ANSWERSAt the pin connections at the ends of the top chords
Placing timber blocking under the tips of the tracks on a crawler crane will; -
ANSWERSMake the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane? - ANSWERSAction 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. - ANSWERS5%
On a crawler crane ground bearing pressure is greatest where? - ANSWERSOver 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? - ANSWERSThe bottom pins ahead of the cantilever point
KNOWLEDGE EXAM 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? -
ANSWERS2%
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? - ANSWERSA. 75%
The most unstable working quadrant for a crawler crane is the; - ANSWERSSide
What type of capacity is listed on a crane load chart? - ANSWERSStatic
If the manufacture of a particular crane does not specifically permit pick and carry
operations what procedure must be followed during this operation? - ANSWERSDon't
make any pick and carry lifts
What is the main purpose of a jib/extension? - ANSWERSTo extend reach higher or up
and over
When the number of layers of rope on a drum increase the line pull___________. -
ANSWERSDecreases
When handling boom sections, the best place for slings to be attached is; -
ANSWERSAt the pin connections at the ends of the top chords
Placing timber blocking under the tips of the tracks on a crawler crane will; -
ANSWERSMake the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane? - ANSWERSAction 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. - ANSWERS5%
On a crawler crane ground bearing pressure is greatest where? - ANSWERSOver 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? - ANSWERSThe bottom pins ahead of the cantilever point
