NCCCO Lattice Boom General Knowledge Exam With 58
Questions & Correct 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? -
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? - ANSWER-A.
75%
The most unstable working quadrant for a crawler crane is the; - ANSWER-Side
What type of capacity is listed on a crane load chart? - 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? - ANSWER-
Don't make any pick and carry lifts
What is the main purpose of a jib/extension? - ANSWER-To extend reach higher
or up and over
When the number of layers of rope on a drum increase the line pull___________. -
ANSWER-Decreases
When handling boom sections, the best place for slings to be attached is; -
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; -
ANSWER-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long
boom crane? - 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. - ANSWER-5%
On a crawler crane ground bearing pressure is greatest where? - 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? - ANSWER-The bottom pins ahead
of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when
wind speed reaches; - ANSWER-20 mph
The definition of cantilever of a lattice boom crane is; - ANSWER-The boom
suspended past the pendant connections
What chart do you use when operating a crane on a barge; - ANSWER-List chart
According to OSHA, Jibs must have a positive ________ from backwards
overturning - ANSWER-Stop
Questions & Correct 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? -
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? - ANSWER-A.
75%
The most unstable working quadrant for a crawler crane is the; - ANSWER-Side
What type of capacity is listed on a crane load chart? - 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? - ANSWER-
Don't make any pick and carry lifts
What is the main purpose of a jib/extension? - ANSWER-To extend reach higher
or up and over
When the number of layers of rope on a drum increase the line pull___________. -
ANSWER-Decreases
When handling boom sections, the best place for slings to be attached is; -
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; -
ANSWER-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long
boom crane? - 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. - ANSWER-5%
On a crawler crane ground bearing pressure is greatest where? - 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? - ANSWER-The bottom pins ahead
of the cantilever point
Most crane manufactures require the load chart capacities must be reduced when
wind speed reaches; - ANSWER-20 mph
The definition of cantilever of a lattice boom crane is; - ANSWER-The boom
suspended past the pendant connections
What chart do you use when operating a crane on a barge; - ANSWER-List chart
According to OSHA, Jibs must have a positive ________ from backwards
overturning - ANSWER-Stop
