Chlorine is how many times heavier than air?
2.5
A quart of liquid chlorine will evaporate into how many quarts of gaseous chlorine?
450
At what temperature does a fusible plug melt?
Between 158° and 165°F.
How many fusible plugs are there on a ton cylinder?
6
How many fusible plugs are there on a 100 or 150 pound chlorine cylinder?
1
What is the most common cause of a chlorine leak?
Lead washer failure or failure to change lead washer
What type of respirator is needed when entering a chlorine room?
SCBA
What is the IDLH for chlorine?
10
How many ppm of chlorine in a room will bring death in seconds?
1,000 ppm or 0.10% by volume
What percentage of the air is oxygen?
20.9%
What chemical is used to oxidize iron from water?
Chlorine
How do you open a chlorine cylinder?
With a six inch box wrench
The iodometric test is used to test for what parameter?
Ozone Residual
What is the minimum free chlorine residual for the distribution system?
0.2 mg/L
What is the minimum combined residual?
0.6 mg/L
What is the maximum residual disinfectant level?
4 mg/L
What does the C in CT value mean?
Concentration of the chlorine residual
What is measured from the chlorine application point to the point where the chlorine residual is taken?
Time
What does the T mean in CT value?
Time
How many pounds of chlorine can you withdraw from a ton cylinder in a day?
400 pounds
How many pounds of chlorine can you draw from a 100 or 150 pound cylinder in a day?
40 pounds
When chlorine is used to disinfect drinking water, the chlorine cylinders are placed on what device to measure usage?
Scale
What is a device used to measure the flow rate of liquid or gasses?
Rotameter
The chlorine scale reading does not equal the rotameter setting for the pass 24 hours. What is the most likely cause?
Air leak down stream of the chlorinator
Pumping dry air into a container or cylinder to assist with the withdrawal of a liquid or gas is called?
Air padding
What is an open or vertical drop or space that separates a potable drinking water supply from an unapproved water or nonpotable water called?
Air gap
What is the most common cause of water borne illnesses in the US?
Cross-connection
What method is considered the most reliable in measuring chlorine residuals?
Amperometric Titration