Trench Flashcards
1
Q
Soil weighs ___ to ___ lbs per cubic foot
A
100 to 125lbs
2
Q
A victim with a foot or two of soil on them could be receiving?
A
750 to 1000lbs of pressure on their chest
3
Q
C 60 will
A
Stand long enough to install shoring and have a water level at or below the bottom of the excavation
4
Q
Type C soil is considered to be the
A
Least stable
5
Q
All soil should be treated as
A
Type C soil
6
Q
Control zones are how far in distance
A
50, 150, 300ft
7
Q
Evacuation signal is 10 seconds followed by a
A
10 second pause
8
Q
When approaching the trench, how far should you keep from the edge?
A
2-3ft
9
Q
A ladder/means of egress shall be placed in a trench that is
A
4ft deep or more
10
Q
The ladder must extend
A
3ft above grade
