NCCCO LATTICE BOOM GENERAL KNOWLEDGE 2024 WITH CORRECT
VERIFIED QUESTIONS WITH CORRECTRY ANALYZED ANSWERS
GRADED A+
What is the minimum design factor required for a right regular lay main boom auxiliary
hoist rope? - 3.5
The hoist drum shall have always at least _______ full wraps of rope on the drum. - 2
The definition of "Upper-works or Superstructure" refer to the area of the crane; - The
structure above the turntable
How many randomly broken wires must there be to remove a running wire rope from
service? - 6
Boom length is defined as? - Center of the boom attachment pin (heel pin, foot pin, pivot
pin), to the center of the boom tip sheaves
The most common type of wire rope in general use is; - Right regular lay
How many randomly distributed broken wires are caused for considering replacement of
a standard running rope? - Three broken wires in in one strand in one lay
On a standing rope, how many broken wires need to be broken at an end connection
before replacing the rope? - 2
According to ASME B30.5 Mobile Crane Standard, in rotation resistant rope, how many
randomly distributed broken wires is caused for consideration for replacement of the
rope? - Two broken wires in six rope diameters
According to OSHA 1926.1412, how often should all running ropes in service be visually
inspected ___________ and in accordance with ____________. - Each shift,
1926.1413(a)
The definition of a lay length of a wire rope is; - 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. - 15 times
, Load- hoisting sheaves shall have a pitch diameter not less than _______ the nominal
diameter of the rope used. - 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? - 18 times
Load capacity charts for crawler cranes are based on which percentage of tipping
capacities? - 75%
The additional load that occurs when a crane experiences sudden starts and stops is
known as what? - Dynamic loading
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? - 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? - A. 75%
The most unstable working quadrant for a crawler crane is the; - Side
What type of capacity is listed on a crane load chart? - Static
If the manufacture of a particular crane does not specifically permit pick and carry
operations what procedure must be followed during this operation? - Don't make any
pick and carry lifts
What is the main purpose of a jib/extension? - To extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. -
Decreases
When handling boom sections, the best place for slings to be attached is; - 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; - Make the
crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane? - 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. - 5%
On a crawler crane ground bearing pressure is greatest where? - Over the corner
VERIFIED QUESTIONS WITH CORRECTRY ANALYZED ANSWERS
GRADED A+
What is the minimum design factor required for a right regular lay main boom auxiliary
hoist rope? - 3.5
The hoist drum shall have always at least _______ full wraps of rope on the drum. - 2
The definition of "Upper-works or Superstructure" refer to the area of the crane; - The
structure above the turntable
How many randomly broken wires must there be to remove a running wire rope from
service? - 6
Boom length is defined as? - Center of the boom attachment pin (heel pin, foot pin, pivot
pin), to the center of the boom tip sheaves
The most common type of wire rope in general use is; - Right regular lay
How many randomly distributed broken wires are caused for considering replacement of
a standard running rope? - Three broken wires in in one strand in one lay
On a standing rope, how many broken wires need to be broken at an end connection
before replacing the rope? - 2
According to ASME B30.5 Mobile Crane Standard, in rotation resistant rope, how many
randomly distributed broken wires is caused for consideration for replacement of the
rope? - Two broken wires in six rope diameters
According to OSHA 1926.1412, how often should all running ropes in service be visually
inspected ___________ and in accordance with ____________. - Each shift,
1926.1413(a)
The definition of a lay length of a wire rope is; - 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. - 15 times
, Load- hoisting sheaves shall have a pitch diameter not less than _______ the nominal
diameter of the rope used. - 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? - 18 times
Load capacity charts for crawler cranes are based on which percentage of tipping
capacities? - 75%
The additional load that occurs when a crane experiences sudden starts and stops is
known as what? - Dynamic loading
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? - 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? - A. 75%
The most unstable working quadrant for a crawler crane is the; - Side
What type of capacity is listed on a crane load chart? - Static
If the manufacture of a particular crane does not specifically permit pick and carry
operations what procedure must be followed during this operation? - Don't make any
pick and carry lifts
What is the main purpose of a jib/extension? - To extend reach higher or up and over
When the number of layers of rope on a drum increase the line pull___________. -
Decreases
When handling boom sections, the best place for slings to be attached is; - 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; - Make the
crane more stable
What is the major effect of stopping suddenly a rapid swing while operating long boom
crane? - 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. - 5%
On a crawler crane ground bearing pressure is greatest where? - Over the corner
