Operation
This term is defined as the killing or inactivation of pathenogenic organisms in water.
What is disinfection?
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 a confined space?
ph measures this.
What is the concentration of hydrogen ions.
The term that describes the condition when small bubbles of air form and explode against the impeller causing a pinging sound.
What is cavitation?
This type of water system serves at least 15 connections or 25 persons at least 60 days out of the year.
What is a public water system?
Of the following chemicals (ferric sulfate, soda ash, and carbon dioxide) this chemical will raise the pH of water.
What is soda ash?
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 chlorine gas?
An MSDS should be kept on file for this long.
What is 30 years?
The operating temperature of a mechanical seal should not exceed this temperature.
What is 160 F ?
Records for chemical analysis must be kept for this length of time.
What is 10 years?
As the water temperature increases, the disinfection action of chlorine will _________.
What is increase?
This type of fire extinguisher should be used on electrical fires.
What is class C or carbon dioxide?
The minimum number of buffers required to calibrate a pH meter.
What is two?
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?
This chemical is the recommended disinfectant in the state of Colorado.
What is chlorine?
Coagulation occurs during the first _________seconds.
What is 1 to 5?
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 15 minutes?
The acid used in the lab test for alkalinity.
What is 0.02 N sulfuric acid?
A component that can be installed on a pump to hold the prime.
What is a foot valve?
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 0.3 NTU ?
Mudballs are clumps of __________.
What is filter media and other material?
The three things that a water system must have in order to safely handle chlorine gas are________.
What are SCBA, a repair kit, and ventilation/detectors?
The sample volume required for the analysis of lead and copper.
The sample volume required for the analysis of lead and copper.
A pump in continuous service should be inspected for cleanliness and leakage this often.
What is daily?
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.
What are turbidity, E. coli, and Cryptosporidium?