Wastewater Safety Ax

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1. An oxygen deficiency. or dangerous concentrations of toxic or suffocating gases. may be found in: *

1 point

A. Toilets

B. Wet wells

C. Chlorine contact tanks

D. Air blower rooms

E. Offices

2. If concentrated acid is spilled on the floor, Immediately: *

1 point

A. Sound the alarm

B. Run to a shower and wash yourself thoroughly

C. Turn off the power and notify the supervisor

D. Pour sodium nitrate and wash with water

E. Wash with water and neutralize with sodium bicarbonate [baking soda]

3. Which one of the following is most explosive? *

1 point

A. Pure digester gas

B. Digester gas mixed with methane

C. Digester gas mixed with air

4. Any lamps used to illuminate sewers should be: *

1 point

A. Brilliant red

B. Plastic

C. Explosion proof

D. Fluorescent

5. Which of the following areas in a wastewater treatment plant are sources of toxic fumes? *

1 point

A. Tightly covered manholes

B. Enclosed screening or degritting areas

C. Digested sludge pump rooms

D. Sludge digestion tanks

E. Sludge gas piping and collection systems

F. Chlorine feeder rooms

G. Chlorine storage areas

H. All of these

6. The lack of an unpleasant odor in a manhole, sump pump or other structure does not always mean that no dangerous gases are present because: *

1 point

A. Some dangerous gases have no odor

B. Oxygen may still be lacking

C. Some gases deaden the sense of smell

D. All of the above

E. None of the above

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