What is disinfection?

This term is defined as the killing or inactivation of pathenogenic organisms in water.

What is a confined space?

A space large enough for a person to bodily enter and perform work, but not designed for continuous occupancy with limited means of entry and exit is ____.

What is the concentration of hydrogen ions.

ph measures this.

What is cavitation?

The term that describes the condition when small bubbles of air form and explode against the impeller causing a pinging sound.

What is a public water system?

This type of water system serves at least 15 connections or 25 persons at least 60 days out of the year.

What is soda ash?

Of the following chemicals ( ferric sulfate, soda ash, and carbon dioxide) this chemical will raise raise the pH of water.

What is chlorine gas?

This gas is greenish yellow in color, has a noxious odor, is 2.5 times as dense as air and may cause toxicity if inhaled, or through contact with the skin.

What is 30 years?

An MSDS should be kept on file for this long.

What is 160 F ?

The operating temperature of a mechanical seal should not exceed this temperature.

What is 10 years?

Records for chemical analysis must be kept for this length of time.

What is increase?

As the water temperature increases, the disinfection action of chlorine will _________.

What is class C or carbon dioxide?

This type of fire extinguisher should be used on electrical fires.

What is two?

The minimum number of buffers required to calibrate a pH meter.

What is closing a valve too fast?

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 chlorine?

This chemical is the recommended disinfectant in the state of Tennessee.

What is 1 to 5?

Coagulation occurs during the first _________seconds.

What is 15 minutes?

In case of a chemical contact with eyes or skin this is the minimum amount of time you should flush the area with water.

What is 0.02 N sulfuric acid?

The acid used in the lab test for alkalinity.

What is a foot valve?

A component that can be installed on a pump to hold the prime.

What is 0.3 NTU ?

According to the Interim Surface Water Treatment Rule, a public water system must maintain the combined effluent turbidity less than or equal to _______NTU in 95% of measurements taken each month.

What is filter media and other material?

Mudballs are clumps of __________.

What are SCBA, a repair kit, and ventilation/detectors?

The three things that a water system must have in order to safely handle chlorine gas are________.

What is one liter?

The sample volume required for the analysis of lead and copper.

What is daily?

A pump in continuous service should be inspected for cleanliness and leakage this often.

What are turbidity, E. coli, and Cryptospridium?

The Long Term 2 Enhanced Surface Water Treatment Rule requires water systems that use surface water or ground water under direct influence to monitor their source water for these 3 contaminants.