Wastewater Collector Class D License Chapter 8

Front 1

1. The National Pretreatment Program protects POTWs and the environment from hazardous
or toxic wastes discharged into the wastewater system.
a. true
b. false

Back 1

a. true

POTW means:

Publicly Owned Treatment Works

Front 2

2. Problems prevented by pretreatment are POTW operation interference, sludge
contamination, chemical exposure to workers and effluent pollutants.
a. true
b. false

Back 2

a. true

POTW operation interference,

Sludge contamination,

Chemical exposure to workers

Effluent pollutants.

Front 3

3. The national program regulations require POTWs, with flow greater than 50 mgd, to
establish an industrial pretreatment program as a permit condition.
a. true
b. false

Back 3

b. false

Front 4

4. Discharge standards prohibit pollutants that create a fire hazard, have a pH >5.0, obstruct
flow, upset treatment or raise wastewater temperature <140° F.
a. true
b. false

Back 4

b. false

Front 5

5. A pretreatment program includes legal authority, procedures, monitoring, technical limits,
industry survey and pay scales.
a. true
b. false

Back 5

b. false

Front 6

6. Monitoring involves scheduled, unscheduled, demand and self-monitoring.
a. true
b. false

Back 6

a. true

Front 7

7. The equitable method for recovering program costs is a user charge system.
a. true
b. false

Back 7

a. true

Front 8

8. Industries that might contribute shock loads to the treatment plant include ________.
a. refineries
b. food processors
c. metal platers
d. all listed

Back 8

d. all listed

Front 9

9. Non-hazardous wastes are chlorides, alkalinity, color, phosphorus and ________.
a. cyanide
b. iron
c. sulfides
d. gasoline

Back 9

b. iron

Front 10

10. Hazardous wastes are cyanide, ________, organics and gasoline.
a. iron
b. phosphorus
c. sulfides
d. alkalinity

Back 10

c. sulfides

Front 11

11. There are two sample types: grab sample and ________ sample.
a. composite
b. demand
c. self
d. scheduled

Back 11

a. composite

Front 12

12. Operators must be alert to instructions regarding sample ________ and treatment.
a. selection
b. transport
c. preparation
d. preservation

Back 12

d. preservation

Front 13

13. Sampling tools and containers must be ________.
a. plastic
b. clean
c. sterile
d. sealed

Back 13

b. clean

Front 14

14. The reaction between waste streams is known as a ________ effect.
a. syndicate
b. synchronized
c. synergistic
d. syncopated

Back 14

c. synergistic