front 1 Chlorine is how many times heavier than air? | back 1 2.5 |
front 2 A quart of liquid chlorine will evaporate into how many quarts of gaseous chlorine? | back 2 450 |
front 3 At what temperature does a fusible plug melt? | back 3 Between 158° and 165°F. |
front 4 How many fusible plugs are there on a ton cylinder? | back 4 6 |
front 5 How many fusible plugs are there on a 100 or 150 pound chlorine cylinder? | back 5 1 |
front 6 What is the most common cause of a chlorine leak? | back 6 Lead washer failure or failure to change lead washer |
front 7 What type of respirator is needed when entering a chlorine room? | back 7 SCBA |
front 8 What is the IDLH for chlorine? | back 8 10 |
front 9 How many ppm of chlorine in a room will bring death in seconds? | back 9 1,000 ppm or 0.10% by volume |
front 10 What percentage of the air is oxygen? | back 10 20.9% |
front 11 What chemical is used to oxidize iron from water? | back 11 Chlorine |
front 12 How do you open a chlorine cylinder? | back 12 With a six inch box wrench |
front 13 The iodometric test is used to test for what parameter? | back 13 Ozone Residual |
front 14 What is the minimum free chlorine residual for the distribution system? | back 14 0.2 mg/L |
front 15 What is the minimum combined residual? | back 15 0.6 mg/L |
front 16 What is the maximum residual disinfectant level? | back 16 4 mg/L |
front 17 What does the C in CT value mean? | back 17 Concentration of the chlorine residual |
front 18 What is measured from the chlorine application point to the point where the chlorine residual is taken? | back 18 Time |
front 19 What does the T mean in CT value? | back 19 Time |
front 20 How many pounds of chlorine can you withdraw from a ton cylinder in a day? | back 20 400 pounds |
front 21 How many pounds of chlorine can you draw from a 100 or 150 pound cylinder in a day? | back 21 40 pounds |
front 22 When chlorine is used to disinfect drinking water, the chlorine cylinders are placed on what device to measure usage? | back 22 Scale |
front 23 What is a device used to measure the flow rate of liquid or gasses? | back 23 Rotameter |
front 24 The chlorine scale reading does not equal the rotameter setting for the pass 24 hours. What is the most likely cause? | back 24 Air leak down stream of the chlorinator |
front 25 Pumping dry air into a container or cylinder to assist with the withdrawal of a liquid or gas is called? | back 25 Air padding |
front 26 What is an open or vertical drop or space that separates a potable drinking water supply from an unapproved water or nonpotable water called? | back 26 Air gap |
front 27 What is the most common cause of water borne illnesses in the US? | back 27 Cross-connection |
front 28 What method is considered the most reliable in measuring chlorine residuals? | back 28 Amperometric Titration |