E3 Flashcards
what must be done if a load, being lifted accidentally comes in contact with the book of a crane?
the crane need to be inspected
How long can a suspended load be left on a hook while the operator is not at the control’s?
not aloud
in what situation is acceptable forms worker to ride a load?
not aloud
What’s the min clearance required while working around a 100,000 volt power line
4.5m or 15feet
What’s the minimum clearance required while working around a 200,000 volt power line
4.5m or 15ft
describe “centre of gravity”
point of balance
Where should the slings attach to the load, in relation to the centre of gravity?
equal distance to or above point of balance
Where will a loads centre of gravity be positioned after it is lifted off the ground? does the position of the centre of gravity depend on how the loads rigged?
down and no It doesn’t
turnbuckles are used to adjust then length of slings so that loads can be lifted
in a level position
turnbuckles are used to adjust then length of slings so that loads can be lifted
in a level position
the screw threads at each end of a turnbuckles sleeve must be ?
left handed at one end and right handed at the other
shoulder type eye bolts and able to withstand pulls at angles no greater than
45 degrees
When several ropes are to be attached to a single hook, make the connection to the hook using a
shackle
the U-bolt part of a cable clip must be installed so it bears on the
dead end of the rope
the number of cable clips required for a connection depends on the
diameter of the rope
correctly installed cable clips will reduce the break strength of wire rope by
20%
When are speaker bars used?
long loads such as gang forms, tilt up, ECT (prevents tipping and stressing)
what sling type should be used to lift 25peices of 25ft long steel pipe
double wrapped, double choker, double wrapped, double basket hitch
a pulling device that can either chain or cable is the
come-along
a apparatus capable of long, continuous lifts is the
tirfor jack