Class 3 Ga Wastewater Treatment

Front 1

Why is wastewater disinfected?

Back 1

Destroy or disable pathogenic organisms

Front 2

The rakes in the primary clarifier jerk, skips or hangs, what should be done?

Back 2

Drain clarifier and determine the soure of the problem

Front 3

The predominant organism responsible for stabilizing the waste in the trickling filter

Back 3

Bacteria

Front 4

The air relief valve in a forced main in a collection system should be located

Back 4

at the highest elevation in the line

Front 5

Hazardous gases that an operator could be exposed to

Back 5

Hydrogen sulfide, methane, carbon dioxide

Front 6

Ratio of methane to carbon dioxide in a properly working anaerobic digester

Back 6

66-70% methane and 30-35% carbon dioxide

Front 7

The best test to perform to determine the stabilization of waste in aerobic digestion system

Back 7

Volatile Solids

Front 8

Organisms that are both aerobic and anaerobic

Back 8

Facultative

Front 9

Conversion of ammonia to nitrate

Back 9

Nitrification

Front 10

Purpose of adding seed to a BOD sample

Back 10

To add organisms to stabilize the organic material in the BOD sample

Front 11

The 1st thing that should be done prior to performing a pH analysis

Back 11

calibrate the meter

Front 12

sludge records must be maintained _______ years.

Back 12

5

Front 13

is added to wastewater in the form of slurry

Back 13

Lime

Front 14

piston pump should be operated when

Back 14

suction and discharge valves are open

Front 15

Electrical current travels in a cathodic protection

Back 15

From anode to pipe

Front 16

Gases formed during anaerobic digestion

Back 16

Initially sulfide at start-up and then methane and carbon dioxide

Front 17

The term for the protection of potentially hazardous materials entering the wastewater plant

Back 17

Pretreatment

Front 18

best thing (tool) to have during a hazardous material spill

Back 18

MSDS

Front 19

A pump and pump motor should be

Back 19

Aligned

Front 20

Best way to record when maintenance is done

Back 20

work order system

Front 21

the purpose of a thermal control circuit on a motor

Back 21

opens the circuit should the motor overheat

Front 22

an operators knows when air filters needs to be replaced when

Back 22

the differential pressure increases between the inlet side and the outlet side

Front 23

some chemicals/reagents are stored in amber bottles due to

Back 23

may be sensitive or reactive with light

Front 24

best way to prevent accidental releases of untreated waste

Back 24

clearly mark all pipes and valves

Front 25

Air-gap Device

Back 25

should be used when water and wastewater in within close proximity

Front 26

the natural biological progression in an anaerobic digester is the

Back 26

acid formers and then the methane formers

Front 27

most important physical characteristic of pump lubricant

Back 27

Viscosity

Front 28

maintenance of a V-notch weir

Back 28

clean and brush off deposits that accumulate in the weir. Keep weir and upstream and downstream channels clear of foreign bodies and interference.

Front 29

GFCI switch

Back 29

monitors the current flowing from hot to neutral and opens (trips) the circuit in an imbalance is detected

Front 30

a motor is allowed to run temporarily without a relief plug after lubrication to allow

Back 30

excess grease to drain out

Front 31

problems caused by hydrogen sulfide gas

Back 31

corrosion of sewers, structures and equipment

Front 32

DO levels in a pond are the lowest

Back 32

Early morning (algae consumes O2 at night)

Front 33

freebee

Back 33

freebee