Water Distribution Exam Sample Text Questions with Verified Answers

Water Distribution Exam Sample Text Questions with Verified Answers What is the federal law that protects public water supplies from harmful contaminants? SDWA Safe Drinking Water Act MCL stands for Maximum Contaminant Level True or False? Primary regulations are mandatory TRUE Secondary regulations are about what 3 things? Taste Odor Color of water True or False? Secondary regulations are mandatory FALSE What is the minimum pressure that must be maintained at all times in a distribution system? 20 PSI The limit for velocity in a system is? 5 ft/sec The spoil pile should be located how far back from the trench wall? 2 feet (min) True or False? A vent in a chlorine room should be located near the ceiling. FALSE An area is considered unsafe when the oxygen level drops to below a) 19.5% b) 20.2% c) 10.5% d) 19.25% a) 19.5% The most common valve used in a distribution system is a) butterfly b) gate c) ball d) check b) gate A chain of custody is required for a sample a) from collection to disposal b) from collection to the lab c) from the lab to disposal d) all of the above b) from the collection to the lab 1 (one) cubic foot of water is _____ lbs a) 7.48 b) 8.34 c) 27 d) 62.38 d) 62.38 How should a CL2 (chlorine) storage room be vented? a) mechanically at the floor b) mechanically at the ceiling c) in the middle of the wall d) no ventilation is required a) mechanically at the floor If a chlorine leak develops in a room where you are working, you should a) quickly leave the room b) crawl on the floor and quickly leave the room c) close your mouth, hold your head as high as possible and quickly leave the room d) call 911, then leave the room c) close your mouth, hold your head as high as possible and quickly leave the room a beard could prevent proper use of what safety equipment? a) goggles b) fire extinguisher c) SCBA d) Safety Vest SCBA (self contained breathing apparatus) Prior to entering a storage tank you should a) Throw a match in the tank to check for explosive gas b) mechanically blow air into the tank c) Do nothing, just go ahead and enter the tank d) notify your supervisor then carefully proceed b) me