NCCER plumbing 1 MODULE 1 with Complete Solutions

latin word for lead - ANSWER-Plumbum latin word for person who works with led - ANSWER-plumbarius When was the first supply pipe laid - ANSWER-Mid 1300's in London When and where were the first apprenticeship laws for plumbing enacted ? - ANSWER-1625 in england developed in the 1930s, What was the first plastic used in plumbing - ANSWER-PVC - polyvinyl chloride In 1993 the non-profit (USGBC) united states green building council developed what - ANSWER-the Leadership in Energy & environmental design (LEED) most states require plumbers to be licensed as - ANSWER-journey man , master plumber , or plumbing contractor Biggest health and safety issues in plumbing are caused by - ANSWER-contamination caused by improper cross connection between plumbing systems What does the backflow preventer do? - ANSWER-keeps waste water from entering the water supply system how do you prevent the spread of harmful chemicals through water supply systems - ANSWER-needs to be disinfection , filtration , and softening when did plumbing re-emerge as a profession - ANSWER-1625 Backflow - ANSWER-a term in plumbing for an unwanted flow of water in the reverse direction. It can be a serious health risk for the contamination of potable water supplies with foul water. Bioswale - ANSWER-A depression in the ground that filters pollutants from stormwater. whats a heavy gas thats used as a disinfectant in water treatment - ANSWER-chlorine Devices that receive water from a water supply line - ANSWER-Fixtures. ex: sinks , toilets