NCCCO Lattice Boom General
Knowledge Exam 2026 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? -
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
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, 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
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Knowledge Exam 2026 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? -
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
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, 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
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
