Show:
Operations
Pumping
Chem Reactions
Chlorine
Fluoride
100
This term is defined as the killing or inactivation of pathenogenic organisms in water.
What is disinfection?
100

Pump cavitation is caused by?

Inadequate net positive suction head

100

What is NaMnO4,

& does it oxidize or sequester?

Sodium Permanganate - Oxidizing Agent

100

What is a chlorine evaporator used for?

Converting liquid chlorine to gas

100

What is the MCL for Fluoride?

4.0 mg/l

200

A chemical feed pump is partially clogged with hardness deposits. Which diluted chemical would you use to dissolve the deposits?

Hydrochloric acid / HCl

200

What type of pump should be started against a closed valve?

Centrifugal pump

200

H3PO4 & NaH2PO4 

are both types of what, and what do they do?

Phosphates - Sequester

orthophosphoric acid & monosodium phosphate

200

Which type of chlorine is most likely to cause taste and odor problems?

Combined chlorine

200

For a fluoride ion saturator, why would diluted water be used?

To combat hardness deposits

300

What compound is used to sequester iron, and or manganese?

Polyphosphate

300
Water hammer is most likely caused by which of the following conditions (dissolved gases in the water, a ruptured water line, or closing a valve to fast)
What is closing a valve too fast?
300

NaOH 

What is it called, and what's it's affect on water?

Sodium Hydroxide

Raises pH / increases stability

Also known as Lye or Caustic Soda

300
As the water temperature increases, the disinfection action of chlorine will _________.
What is increase?
300

How far away is should you take a fluoride sample from the injection point?

20 feet

400

When should an altitude valve open for a water tank?

When the water level is decreasing

400
A component that can be installed on a pump to hold the prime.
What is a foot valve?
400

When would you use CuSO4?

Copper Sulfate

Algae blooms


400

To provide automatic, start up and shut down of a chlorine gas feed system, a solenoid valve should be installed on the ___?

Waterline to the injector

400

Which fluoride ion chemical should I be 10 mg/L free chlorine residual?

NaF

500

What does a VFD control?

Motor speed

500

What is a magnetic contactor used for?

To start and stop a pump

500

Na2SiO3, name and purpose?

Sodium silicate

Sequesters Iron & Manganese

500

If 595.7 pounds of 70% HTH are used to disinfect a 1,000,000 gallon tank what is the chlorine dosage in milligrams per liter?

50 mg/L

500

Using a saturator, how many gallons of NAF are needed to provide a .9 mg/L dosage with a 280,000 gallons per day pland flow?

14 gallons