safety Flashcards
1
Q
wastewater collection classification is based on
A
population served
2
Q
wwc population 1500 or fewer
A
class 1
3
Q
wwc population 1500-15,000
A
class 2
4
Q
wwc populaton 15,000-50,000
A
class 3
5
Q
wwc population 50,000 or more
A
class 4
6
Q
decibel level for hearing loss
A
75 decibel
7
Q
distance to keep spoils from edge of excavation
A
1m or 3ft
8
Q
interval distance for access and exits in trench of 5ft or deeper
A
8m or 25ft
9
Q
depth excavation needs to be shored or cut back
A
1.5m or 5 feet
10
Q
degree for sloping in an excavation
A
45
11
Q
neutralizing agents for acids
A
baking soda
12
Q
neutralizing agent for bases
A
vinegar
13
Q
a LEL of .0 to .2 means
A
gases present but not explosive
14
Q
a LEl of .2-1. means
A
gases in explosive range
15
Q
concentration for normal oxygen
A
20.9
