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NCCCO Lattice Boom General Knowledge Questions and Answers 2024
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NCCCO Lattice Boom General Knowledge Questions and Answers 2024
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NCCCO Lattice Boom GeneralKnowledge Questions and Answers 2024
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
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