Nccco Core + Specialty Test Prep Solved #15.
ASME B30.5 - correct answer Mobile and Locomotive cranes, all types
ASME B30.3 - correct answer Tower Cranes
ASME B30.23 - correct answer Personel Lifting Regs
OSHA 29 CFR 1926.1400 Series - correct answer Cranes & Derrick's used in
Construction regs.
Rotation Resistant Wire Rope - correct answer 2 randomly broken wires in 6 diameters.
4 randomly broken wires in 30 diameters.
Safety factor 5.0
Safety factor personel lifts 10-1
ASME B30.9 - correct answer Slings
Personel Platforms
ASME B30.23 - correct answer Maximum Wind 15mph
Cranes capacity not exceed 50%
Rigging 5-1 Safety Factor, if Wire Rope Bridal must use masterlink or Shackle
Attachment.
Wire Rope Safety Factor 7-1, Rotation Resistant 10-1
Sling eyes must have thimbles.
Load test platform 125% / 5 minutes before use.
Frequent + daily inspection.
100' per minute lower speed.
Gate must Open Inward.
OSHA 29 CFR 1926.1402
Ground Conditions - correct answer Ground must be firm, graded and drained.
Warn Operator of Locations of Hazards.
Outriggers + Dunnage - correct answer Pads should be Secured To Outriggers.
Outrigger Floats + Mats should be able to Support Total Weight of Crane and Load,
including rigging.
, Fully extended, tires off ground. Free of Crane weight.
If cannot fully extend outriggers, on rubber chart should be used. Unless have load
chart for partially extended.
Outrigger Pads Must be 90° angle to cylinder.
Mats and Blocking used to distribute bearing pressure.
Never block under outrigger beams.
Truck crane pick over front require front outrigger load chart.
Spans and gapped blocking fails at 50% load and destroys pads.
Swing Clearance - correct answer Swing clearance must be barricaded. (2' outside
swing radius)
Best Leveling Surface On Crane? - correct answer Upper works.
Cranes 3° out of level will? - correct answer Decrease capacity by as much as 50%.
Plus add to excessive boom side loading and sheeve wear.
Level not to exceed <1°
When Swinging Unlevel Crane? - correct answer Load Radius Increases.
Extended Crawlers Will? - correct answer Increase over the side capacity.
Greatest Ground Pressure Exerted By Crane? - correct answer Over rear corner
(outriggers)
Corners (crawlers)
Least Exerted Ground Pressure By Crane? - correct answer Over side (both outrigger
and crawler)
Greatest Crane Lifting Capacity? - correct answer Rear (outriggers and crawlers)
Distance from Excavations? - correct answer 1.5 ratio, I.E 10' Deep Excavation
10x1.5=15' from outrigger pad.
Newly Compacted Soil near walls is a 1-1 ratio.
ASME B30.5 - correct answer Mobile and Locomotive cranes, all types
ASME B30.3 - correct answer Tower Cranes
ASME B30.23 - correct answer Personel Lifting Regs
OSHA 29 CFR 1926.1400 Series - correct answer Cranes & Derrick's used in
Construction regs.
Rotation Resistant Wire Rope - correct answer 2 randomly broken wires in 6 diameters.
4 randomly broken wires in 30 diameters.
Safety factor 5.0
Safety factor personel lifts 10-1
ASME B30.9 - correct answer Slings
Personel Platforms
ASME B30.23 - correct answer Maximum Wind 15mph
Cranes capacity not exceed 50%
Rigging 5-1 Safety Factor, if Wire Rope Bridal must use masterlink or Shackle
Attachment.
Wire Rope Safety Factor 7-1, Rotation Resistant 10-1
Sling eyes must have thimbles.
Load test platform 125% / 5 minutes before use.
Frequent + daily inspection.
100' per minute lower speed.
Gate must Open Inward.
OSHA 29 CFR 1926.1402
Ground Conditions - correct answer Ground must be firm, graded and drained.
Warn Operator of Locations of Hazards.
Outriggers + Dunnage - correct answer Pads should be Secured To Outriggers.
Outrigger Floats + Mats should be able to Support Total Weight of Crane and Load,
including rigging.
, Fully extended, tires off ground. Free of Crane weight.
If cannot fully extend outriggers, on rubber chart should be used. Unless have load
chart for partially extended.
Outrigger Pads Must be 90° angle to cylinder.
Mats and Blocking used to distribute bearing pressure.
Never block under outrigger beams.
Truck crane pick over front require front outrigger load chart.
Spans and gapped blocking fails at 50% load and destroys pads.
Swing Clearance - correct answer Swing clearance must be barricaded. (2' outside
swing radius)
Best Leveling Surface On Crane? - correct answer Upper works.
Cranes 3° out of level will? - correct answer Decrease capacity by as much as 50%.
Plus add to excessive boom side loading and sheeve wear.
Level not to exceed <1°
When Swinging Unlevel Crane? - correct answer Load Radius Increases.
Extended Crawlers Will? - correct answer Increase over the side capacity.
Greatest Ground Pressure Exerted By Crane? - correct answer Over rear corner
(outriggers)
Corners (crawlers)
Least Exerted Ground Pressure By Crane? - correct answer Over side (both outrigger
and crawler)
Greatest Crane Lifting Capacity? - correct answer Rear (outriggers and crawlers)
Distance from Excavations? - correct answer 1.5 ratio, I.E 10' Deep Excavation
10x1.5=15' from outrigger pad.
Newly Compacted Soil near walls is a 1-1 ratio.
