A type of laboratory glassware used to mix chemicals and measure approximate volumes.
What is a beaker?
100
The major complaint caused by high levels of manganese.
What is black or brown water and staining of laundry and fixtures?
100
The typical jar test jar can hold this amount and is this shape.
What is 2 L and square?
100
Disinfection byproducts such as THMs and HAA5s are formed when organic matter comes into contact with this:
What is chlorine?
100
The chemical present in bacteriological sampling bottles that neutralizes chlorine.
What is sodium thiosulfate?
200
The device that sterilizes laboratory apparatus and microbial media by using pressurized steam.
What is an autoclave?
200
The secondary MCL for manganese.
What is 0.05 mg/L?
200
The attractive force between particles that allows coagulation to occur.
What is Van Der Waals force?
200
Chemical records must be kept for a minimum of ____ years.
What is 10 years.
200
Records of bacteriological analysis should be kept for a minimum of___ years.
What is five years?
300
The operating temperature and pressure for an autoclave.
What is 121 c at 15 psi?
300
Name at least two chemicals that can be used to oxidize iron and manganese.
What are potassium permanganate, chlorine, ozone, oxygen,sodium permanganate, hydrogen peroxide, etc?
300
The most commonly used coagulant.
What is alum?
300
The MCL for Trihalomethanes is __
What is 0.08 mg/L?
300
If too much potassium permanganate is fed the water will turn this color.
What is pink?
400
What type of glassware is the most accurate. (beaker, graduated cylinder or volumetric flask)
What is a volumetric flask?
400
Red water complaints can occur with iron concentrations above ___.
What is 0.3 mg/L?
400
The three plant processes that jar tests simulate.
What is coagulation, flocculation, and sedimentation?
400
The maximum contaminant level goal for carcinogens.
What is zero mg/L?
400
This pathogen is a protozoan that can form an oocyst which is resistant to chlorine and can pass through conventional filters,
What is cryptosporidium?
500
This is a laboratory instrument that is capable of performing serveral different tests, including chlorine, phosphate, iron, manganese, and nitrate.
What is a spectrophotometer?
500
This type of phosphate can be used to sequester iron and manganese.
What are polyphosphates?
500
The average flow for a water plant is 3.25 MGD. A jar test indicates that the best alum dosage is 2.5 mg/L. Determine how many pounds per day of alum to feed.
What is 67.7 lbs?
500
Metal samples must be preserved to a pH less than 2 with this type of acid.
What is nitric acid?
500
A water system collects 100 samples a month, determine the number of positives that the system can have and still be in compliance.