Chemistry
The chemical symbol for iron is ___.
Fe
One kilogram equals ____ grams.
1000
What term describes water that is suitable for drinking?
Potable
In the context of water, MCL stands for ___.
Maximum Contaminant Level
Largest industry consumer of freshwater in the United States?
Agricultural irrigation
The pH scale runs from ____.
0-14
What is the volume of a settling tank 100 ft long, 25 ft wide, and 8 ft deep?
20,000 ft cubed
LxWxH
Disease-producing organisms are commonly called ___.
pathogens
True or False: The Safe Drinking Water Act applies to bottled water.
False
What is the process called when water vapor changes to tiny droplets?
Condensation
What flame color do copper ions produce when heated?
Blue-green
What is the chlorine demand if the residual is 0.6 mg/L and 6.6 mg/L has been applied?
6 mg/L
dose = demand + residual
Name 3 items that could be worn for lab safety.
Gloves, goggles, glasses, lab coat, mask, closed toe shoes, etc.
What federal law is designed to protect the safety and health of water operators?
OSHA
What are the two main causes of hardness in water?
Calcium and magnesium
If water is added to concentrated acid, instead of acid into water, what will happen?
Heat is generated and the mixture tends to splash acid.
A 50 lb container of calcium hypochlorite contains 65% available chlorine. How many pounds of available chlorine does it contain?
32.5 pounds
0.65 x 50
The # of water samples to be taken per month on a given water supply is based on...
Population being served by the system
What year was the Safe Drinking Water Act first passed?
1974
A 4-log removal means ___ percent removal/inactivation in water treatment.
99.99
What is the water molecule if there is an uneven distribution of electrons within the molecule?
Polar
The temperature of water in a stream is 10 degrees Celsius. What is the equivalent temperature in degrees Fahrenheit?
50 degrees Fahrenheit
10 degrees C (1.8) + 32
A cross-connection is defined as a connection between...
a potable water system and non-potable water system
The basis of Colorado Water Rights is the ___.
Prior Appropriation Doctrine
First in time, first in right
What is the average water usage (in gallons per day) of Americans in their home?
About 82 gallons of water a day at home