NCCER plumbing 1 MODULE 1 Questions & Answers

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 heat that is generated below the earths surface - ANSWER geothermal water that comes from baths and washing machines - ANSWER graywater potable - ANSWER water thats safe for drinking process of removing magnesium and sodium salts that cause scale on the inside of pipe and fitting - ANSWER softening When did Philadelphia begin using cast iron pipeing for water mains - ANSWER 1804