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NCCCO Lattice Boom General Knowledge Questions with Correct Answers.
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NCCCO Lattice Boom General Knowledge Questions with Correct Answers.
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NCCCO Lattice Boom General Knowledge Questionswith 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? Correct 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? Correct Answer-A. 75%
The most unstable working quadrant for a crawler crane is the; Correct
Answer-Side
What type of capacity is listed on a crane load chart? Correct 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? Correct Answer-Don't make any pick and carry lifts
What is the main purpose of a jib/extension? Correct Answer-To extend
reach higher or up and over
When the number of layers of rope on a drum increase the line
pull___________. Correct Answer-Decreases
, When handling boom sections, the best place for slings to be attached is;
Correct 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; Correct Answer-Make the crane more stable
What is the major effect of stopping suddenly a rapid swing while
operating long boom crane? Correct 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. Correct
Answer-5%
On a crawler crane ground bearing pressure is greatest where? Correct
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? Correct
Answer-The bottom pins ahead of the cantilever point
Most crane manufactures require the load chart capacities must be
reduced when wind speed reaches; Correct Answer-20 mph
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