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NCCCO Final Test(LATEST UPDATE
Which area do truck cranes without a 5th outrigger generally have no lifting capacity unless the manufacturer states otherwise? - ANSWER The front What is the definition of "operating radius?" - ANSWER The distance from the center of rotation of the crane to the center of gravity of the load What applies to the capacities below the bold line shown on a load chart? - ANSWER They are based on the stability of the crane In which quadrant are rough terrain crane capacities generally greater? - ANSWER Over the front What percentage do most manufacturers requires a crane's load chart capacity to be reduced by for duty cycle operations - such as high-volume concrete placement? - ANSWER 20% From which two points should the boom be measured? - ANSWER From the boom hinge pins, to the center of the boom tip sheave What is the preferred method of installing wire rope from a reel onto a hoist drum? - ANSWER Running the rope from the top of the reel, to the top of the drum. 1 / 2
Over which quadrant are truck crane capacities usually greater? - ANSWER Over the rear According to OSHA, which accessible area of an operating crane must always be barricaded? - ANSWER The swing radius of the rear of the rotating superstructure What is the OSHA regulation governing cranes in construction? - ANSWER
1926.1400
According to ASME, what percentage of the manufacturer's crane rating must not be exceeded if a load test is done on a repaired crane? - ANSWER 100% Where is the tipping axis of a crawler crane located? - ANSWER It depends if the idler or sprocket are in line or offset from the track rollers 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
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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.
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