safety Flashcards by J J

Q

wastewater collection classification is based on

A

population served

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

wwc population 1500 or fewer

A

class 1

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

wwc population 1500-15,000

A

class 2

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

wwc populaton 15,000-50,000

A

class 3

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

wwc population 50,000 or more

A

class 4

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

decibel level for hearing loss

A

75 decibel

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

distance to keep spoils from edge of excavation

A

1m or 3ft

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

interval distance for access and exits in trench of 5ft or deeper

A

8m or 25ft

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

depth excavation needs to be shored or cut back

A

1.5m or 5 feet

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

degree for sloping in an excavation

A

45

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

neutralizing agents for acids

A

baking soda

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

neutralizing agent for bases

A

vinegar

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

a LEL of .0 to .2 means

A

gases present but not explosive

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

a LEl of .2-1. means

A

gases in explosive range

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

concentration for normal oxygen

A

20.9

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

minimal oxygen level in atmopshere

A

19.5

Q

increases ph

A

bases

Q

decreases ph

A

acids