NCCCO FINAL TEST QUESTIONS WITH COMPLETE A GRADED SOLUTIONS
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Course
NCCCO
Institution
NCCCO
NCCCO FINAL TEST QUESTIONS WITH COMPLETE A GRADED SOLUTIONS
What is the primary purpose of placing blocking under the ends of the tracks on a crawler crane? - Answer-To ensure that the tipping axis is the sprocket or idler, rather than a track roller.
Suppose you are traveling a crawler cra...
NCCCO FINAL TEST QUESTIONS
WITH COMPLETE A GRADED
SOLUTIONS
What is the primary purpose of placing blocking under the ends of the tracks on a
crawler crane? - Answer-To ensure that the tipping axis is the sprocket or idler, rather
than a track roller.
Suppose you are traveling a crawler crane with the drive trains to the rear, and you
need to turn right on hard, and level ground. What should you do? - Answer-Travel the
left track forward to minimize wear.
When using outrigger jacks to level a crane, what is the best procedure to follow? -
Answer-Make firm contact with all four jacks. Then operate two jacks at a time on either
side of the lowest corner to get to level. Last, make sure the crane is high enough to
have the tires off the ground.
How does the use of outriggers increase the tipping capacity of a crane? - Answer-By
moving the tipping axis further from the center of gravity of the crane
Many load charts for cranes state that the area of least stability is over the side. What
statement explains this the best? - Answer-The distance between the crane's center of
gravity and the tipping axis is smallest in that quadrant.
List two examples of outrigger use in which the crane's leverage on the load is reduced.
- Answer-Outriggers not fully extended, tires not off ground
According to OSHA 29 CFR 1910.180, how accurate must a load weight be if it is in the
structural portion of the load chart? - Answer-Plus of minus 10%
Based on OSHA and ASME standards, which of the following conditions are required
for blocking or cribbing? - Answer-• Blocking/Cribbing must provide 100% support for
each float,
• Must be large enough in area² to prevent sinking,
• Must be strong enough to prevent crushing, bending, or shear failure.
According to OSHA, when can an operator leave his seat with a suspended load in the
air? - Answer-Almost never (and the exception requires that four conditions be met)
The ASME standard requires operators to pass four exams and to demonstrate
knowledge in four areas.
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