NCCCO Lattice Boom General Knowledge
Exam Questions With Correct Answers
.A long boom crane working at minimum radius and 3 degrees out of level will have a loss of capacity by;
- ANSWER-50%
.According to ASME B30.5 a fire extinguisher shall have a rating of __________ and shall be available at
all operator's stations or cabs of the equipment. - ANSWER-10 BC or higher
.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? - ANSWER-Two
broken wires in six rope diameters
.According to B30.10 hooks shall be removed from service when the throat opening exceeds _____ the
original throat opening. - ANSWER-5%
.According to OSHA 1926.1412, how often should all running ropes in service be visually inspected
___________ and in accordance with ____________. - ANSWER-Each shift, 1926.1413(a)
.According to OSHA, Jibs must have a positive ________ from backwards overturning - ANSWER-Stop
.Backward stability of a crane is tested with the crane configured; - ANSWER-Basic boom at maximum
angle with no load
.Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope diameter. -
ANSWER-16 times
.Boom hoisting sheaves shall have pitch diameter of not less than ____ the nominal diameter of the
rope used. - ANSWER-15 times
.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
, .Can rotation resistant rope be used with a swivel? - ANSWER-If approved by the rope's manufacture
.D to d ratio means what? - ANSWER-Sheave diameter or Pitch diameter divided by wire rope diameter
.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 boom connection pins are to be removed next? -
ANSWER-The bottom pins ahead of the cantilever point
.How far can a freely suspended lattice boom be erected beyond the pendant connections? - ANSWER-
Varies by manufacture
.How many broken wires must be present in one strand of one lay for running wire rope to be removed
from service? - ANSWER-3
.How many randomly broken wires must there be to remove a running wire rope from service? -
ANSWER-6
.How many randomly distributed broken wires are caused for considering replacement of a standard
running rope? - ANSWER-Three broken wires in in one strand in one lay
.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
.If you move a crawler crane from soft ground to hard ground, ground bearing pressure will; - ANSWER-
Increase
.Lattice boom cranes manufactured after 11-8-2011 must have which safety device installed - ANSWER-
Anti-two block prevention device
.Lattice boom cranes manufactured after 2-28-92 must have which safety device installed? - ANSWER-
Anti-two block warning device
Exam Questions With Correct Answers
.A long boom crane working at minimum radius and 3 degrees out of level will have a loss of capacity by;
- ANSWER-50%
.According to ASME B30.5 a fire extinguisher shall have a rating of __________ and shall be available at
all operator's stations or cabs of the equipment. - ANSWER-10 BC or higher
.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? - ANSWER-Two
broken wires in six rope diameters
.According to B30.10 hooks shall be removed from service when the throat opening exceeds _____ the
original throat opening. - ANSWER-5%
.According to OSHA 1926.1412, how often should all running ropes in service be visually inspected
___________ and in accordance with ____________. - ANSWER-Each shift, 1926.1413(a)
.According to OSHA, Jibs must have a positive ________ from backwards overturning - ANSWER-Stop
.Backward stability of a crane is tested with the crane configured; - ANSWER-Basic boom at maximum
angle with no load
.Block hoisting sheaves should have a minimum pitch diameter of at least________ the rope diameter. -
ANSWER-16 times
.Boom hoisting sheaves shall have pitch diameter of not less than ____ the nominal diameter of the
rope used. - ANSWER-15 times
.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
, .Can rotation resistant rope be used with a swivel? - ANSWER-If approved by the rope's manufacture
.D to d ratio means what? - ANSWER-Sheave diameter or Pitch diameter divided by wire rope diameter
.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 boom connection pins are to be removed next? -
ANSWER-The bottom pins ahead of the cantilever point
.How far can a freely suspended lattice boom be erected beyond the pendant connections? - ANSWER-
Varies by manufacture
.How many broken wires must be present in one strand of one lay for running wire rope to be removed
from service? - ANSWER-3
.How many randomly broken wires must there be to remove a running wire rope from service? -
ANSWER-6
.How many randomly distributed broken wires are caused for considering replacement of a standard
running rope? - ANSWER-Three broken wires in in one strand in one lay
.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
.If you move a crawler crane from soft ground to hard ground, ground bearing pressure will; - ANSWER-
Increase
.Lattice boom cranes manufactured after 11-8-2011 must have which safety device installed - ANSWER-
Anti-two block prevention device
.Lattice boom cranes manufactured after 2-28-92 must have which safety device installed? - ANSWER-
Anti-two block warning device
