RIG CH.7 Flashcards
What should be done before using any piece of equipment?
Pre-trip inspection
What is the purpose of the outriggers?
To stabilize and level the truck
T or F: The outriggers are not intended to raise the truck off the ground, they are meant for leveling and stabilization.
True
The boom should only be operated at the lowest half of the swing pattern if the truck is at or greater than this angle?
5 degrees
What are the three turret configurations for a digger derrick?
Rear center, forward center, and corner mount
What should any operator refer to prior to using the digger ?
boom operational chart
What is the digger derrick operational zone?
The zone in which the boom should be operated.
What should the operator refer to before lifting any load with the boom?
load angle chart
When is a boom at its strongest?
When it is fully retracted and at its highest possible angle.
When is the load angle chart accurate?
When the equipment is level.
The digger derrick’s ability to lift an object that is within the maximum lift capacity depends on what two factors?
Hook radius and sheave height
What is the hook radius?
the horizontal distance the hook is from the center of the turret
What is the sheave height?
the vertical distance the sheave is from the height of the turret base
How often should AC dielectric tests be performed on material handler booms?
Annually
T or F: Material handlers can be used even if it is not in a safe working condition.
False
