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Module 1 session 3-4

Horizontales
Pile created when an excavation is underway
Accumulation of this can cause an excavation cave-in
Most stable soil type
Page 48 figure 44 shows this type of hazard
Number one cause of death to an equipment operator
How many feet spoil piles and machinery set back from edge of an excavation
Extremely dangerous indoors, cannot see, smell or taste it
Fast acting circuit breaker that senses small imbalances caused by current leakage to ground
Not sand but still type C
Distance in feet required for an exit in a trench over four feet deep
Tools designed to prevent shock
A means of stacking loads by alternating layers at right angles to each other
Depth at which a registered professional engineer is required to design entire protective system for an excavation
Any man made cut, cavity, trench or depression
To cut back the sides of a trench creating steps
Safe working distance in feet from a 50,000 volt conductor
Condition in which one is caught-in-between a moving object and a solid surface
One who is responsible for directing a vehicle when the driver's view is blocked
Are designed for the specific tool or machine you are using
Having current travel through the body causing injury or death
Verticales
Cut power to equipment
Most cave-ins occur in trenches five to ....... feet
There must be an exit every 25ft for every trench over .... feet deep
Structure used to prevent cave-ins
Formal procedure using locks and tags making equipment inoperable for servicing
Of current, less than one can kill
Conductive body, usually earth
Being hit by a moving object
Type c soil
Circuit breaker or disconnect switch
Work area near a hazard but not in it
Excavations must be inspected ..... by a competent person
Structure used to protect workers in an excavation
Help to eliminate falling objects by using one of these on tools
In an excavation. When in doubt ......
Most common safety grounding system