NCCCO Lattice Boom General Knowledge latest
update 2025/2026
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 assembling a lattice boom crane the top pins of the boom sections should
be inserted; - ANSWER-First
Block hoisting sheaves should have a minimum pitch diameter of at least________
the rope diameter. - ANSWER-16 times
What is the correct method of checking the brakes of crane that has been already
assembled? - ANSWER-Lift the load a few inches off the ground and apply the
brakes
What is the minimum design factor required for a right regular lay main boom
auxiliary hoist rope? - ANSWER-3.5
The hoist drum shall have always at least _______ full wraps of rope on the drum.
- ANSWER-2
The definition of "Upper-works or Superstructure" refer to the area of the crane; -
ANSWER-The structure above the turntable
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
update 2025/2026
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 assembling a lattice boom crane the top pins of the boom sections should
be inserted; - ANSWER-First
Block hoisting sheaves should have a minimum pitch diameter of at least________
the rope diameter. - ANSWER-16 times
What is the correct method of checking the brakes of crane that has been already
assembled? - ANSWER-Lift the load a few inches off the ground and apply the
brakes
What is the minimum design factor required for a right regular lay main boom
auxiliary hoist rope? - ANSWER-3.5
The hoist drum shall have always at least _______ full wraps of rope on the drum.
- ANSWER-2
The definition of "Upper-works or Superstructure" refer to the area of the crane; -
ANSWER-The structure above the turntable
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
