NCCCO LATTICE BOOM CRANE GENERAL
KNOWLEDGE STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND VERIFIED CORRECT ANSWERS WITH
DETAILED RATIONALES CCO
CERTIFICATION EXAM PREPARATION
CRANE SAFETY, LOAD CHARTS, RIGGING,
CRANE OPERATIONS, OSHA STANDARDS
AND INSPECTION | GRADE A+ REVIEW
The definition of a lay length of a wire rope is; - CORRECT ANSWER -The
length along the rope in which on strand makes a complete revolution
around the rope.
Boom hoisting sheaves shall have pitch diameter of not less than ____ the
nominal diameter of the rope used. - CORRECT ANSWER -15 times
Load- hoisting sheaves shall have a pitch diameter not less than _______
the nominal diameter of the rope used. - CORRECT ANSWER -18 times
, When rotation resistant ropes are used in boom hoisting reeving systems,
sheaves used shall have a rope pitch diameter of not less than? - CORRECT
ANSWER -18 times
Load capacity charts for crawler cranes are based on which percentage of
tipping capacities? - CORRECT ANSWER -75%
The additional load that occurs when a crane experiences sudden starts and
stops is known as what? - CORRECT ANSWER -Dynamic loading
What is a luffing jib? - CORRECT ANSWER -A jib that can change radius and
angles independent of the main boom
When a lattice crane is in a Tower configuration and the crane has a
variable position gantry, the gantry should be in which position? - CORRECT
ANSWER -In the full up position
How far can a freely suspended lattice boom be erected beyond the pendant
connections? - CORRECT ANSWER -Varies by manufacture
The tipping axis of a crawler crane; - CORRECT ANSWER -Depends if the
idler or sprocket are in line or offset from the track rollers.
Lattice boom cranes manufactured after 2-28-92 must have which safety
device installed? - CORRECT ANSWER -Anti-two block warning device
KNOWLEDGE STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND VERIFIED CORRECT ANSWERS WITH
DETAILED RATIONALES CCO
CERTIFICATION EXAM PREPARATION
CRANE SAFETY, LOAD CHARTS, RIGGING,
CRANE OPERATIONS, OSHA STANDARDS
AND INSPECTION | GRADE A+ REVIEW
The definition of a lay length of a wire rope is; - CORRECT ANSWER -The
length along the rope in which on strand makes a complete revolution
around the rope.
Boom hoisting sheaves shall have pitch diameter of not less than ____ the
nominal diameter of the rope used. - CORRECT ANSWER -15 times
Load- hoisting sheaves shall have a pitch diameter not less than _______
the nominal diameter of the rope used. - CORRECT ANSWER -18 times
, When rotation resistant ropes are used in boom hoisting reeving systems,
sheaves used shall have a rope pitch diameter of not less than? - CORRECT
ANSWER -18 times
Load capacity charts for crawler cranes are based on which percentage of
tipping capacities? - CORRECT ANSWER -75%
The additional load that occurs when a crane experiences sudden starts and
stops is known as what? - CORRECT ANSWER -Dynamic loading
What is a luffing jib? - CORRECT ANSWER -A jib that can change radius and
angles independent of the main boom
When a lattice crane is in a Tower configuration and the crane has a
variable position gantry, the gantry should be in which position? - CORRECT
ANSWER -In the full up position
How far can a freely suspended lattice boom be erected beyond the pendant
connections? - CORRECT ANSWER -Varies by manufacture
The tipping axis of a crawler crane; - CORRECT ANSWER -Depends if the
idler or sprocket are in line or offset from the track rollers.
Lattice boom cranes manufactured after 2-28-92 must have which safety
device installed? - CORRECT ANSWER -Anti-two block warning device
