Surface Water Treatment Review

The following are causes of excess vibration of a pump... except.

• Pump wear

• Bent shaft

• Worn bearings

• Foundation not secure

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is not a physical hazard that may be present at a surface water facility?

• Moving or rotating parts

• Confined spaces

• Customer complaints

• Condensation on the floor

• Stairs

Methods used to detect chlorine gas leak.

• Ammonium Hydroxide in a squeeze bottle

• Pressured air

• Rag soaked in ammonia

Tags

NGSS.MS-PS1-2

What does NTU stand for?

• Nephelometric turbidity unit

• Nautical Turbidity Unit

• Nephelometric Temperature Unit

• Not Taking Us

What are parameters to determine the effectiveness of softening process?

• Color and Turbidity

• Chlorine residual, no unsafe bacti samples

• Hardness and pH of water

• pH, total alkalinity, magnesium hardness, temperature

Tags

NGSS.MS-PS1-5

What is a colorimetric test?

• Chemicals are added to a solution to form distinct color. The colors are then compared

• Color of a sample is tested based on base color. No chemicals are added. The color is compared to a color wheel

• You add chemicals to a solution, then add Iodide to it to create the base color. The color is then compared to a pure form of the mixed chemicals

• A coloring book of meters

Sampling bottle's used for bacteriological sampling for chlorinated water must be...

• Brown glass bottle

• Sterilized

• Contain sodium thiosulfate

• Recycled composite bottle.

What is a control strategy for disinfection byproducts?

• Decrease concentration of disinfectant

• Increase concentration of disinfectant

• Disinfect at the beginning of the treatment process

• Increase contact time for disinfectant

Tags

NGSS.MS-ETS1-2

Describe a split sample for monthly testing of fluoride by State Lab of Hygiene

• Half on the toothbrush in the morning and half at night.

• One large sample where the operator takes half and the other half is analyzed by state lab of hygiene

• Slice a sample with a Ninja knife

• One large sample where the operator takes half and the other half is analyzed by state lab of hygiene

Jar Testing is not used to determine...

• Effectiveness of coagulation chemicals in flocculation formation

• Sedimentation rate

• Turbidity of treated water

• Baffling factor