NCCCO Lattice Boom General Knowledge
correct 100%
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
, Backward stability of a crane is tested with the crane configured; - ANSWER Basic
boom at maximum angle with no load
How many broken wires must be present in one strand of one lay for running wire
rope to be removed from service? - ANSWER 3
On the majority of conventional cranes the power is transferred to a torque
converter by a; - ANSWER Master clutch
What is the maximum number of broken wires acceptable before a replacement
on a standing wire rope? - ANSWER 2
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
How many randomly broken wires must there be to remove a running wire rope
from service? - ANSWER 6
Boom length is defined as? - ANSWER Center of the boom attachment pin (heel
pin, foot pin, pivot pin), to the center of the boom tip sheaves
correct 100%
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
, Backward stability of a crane is tested with the crane configured; - ANSWER Basic
boom at maximum angle with no load
How many broken wires must be present in one strand of one lay for running wire
rope to be removed from service? - ANSWER 3
On the majority of conventional cranes the power is transferred to a torque
converter by a; - ANSWER Master clutch
What is the maximum number of broken wires acceptable before a replacement
on a standing wire rope? - ANSWER 2
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
How many randomly broken wires must there be to remove a running wire rope
from service? - ANSWER 6
Boom length is defined as? - ANSWER Center of the boom attachment pin (heel
pin, foot pin, pivot pin), to the center of the boom tip sheaves
