CCHT Water Exam 31 Questions with Verified Answers,100% CORRECT

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CCHT Water Exam 31 Questions with Verified Answers What are the two main reason for treating the water used for hemodialysis? - CORRECT ANSWER preventing harm to the patient and preventing damage... to the RO system List the contaminants in the water that are living creatures? - CORRECT ANSWER Bacteria and viruses What are the usual way that water becomes contaminated? - CORRECT ANSWER The process of acid rain, surface water from lakes, ponds, rivers and reservoris. Define endotoxin - CORRECT ANSWER A part of the bacterial cell walls that can contaminate water used for dialysis What is the function of the water softener in a water treatment system? What principle is responsible for this? - CORRECT ANSWER To remove calcium and magnesium. the water softener works by ion exchanges According to AAMI standard, how often should bacteriological testing of water used for dialysis be done? - CORRECT ANSWER monthly Why is water considered safe for drinking not necessarily safe for hemodialysis? - CORRECT ANSWER Patient are exposed to very large volumes of water during dialysis. What contaminants are removed by the carbon tants? - CORRECT ANSWER Chlorine, chloramines, pesticide, industrial solvents, and some trace organic substances.- The carbon tanks work on the principle of adsorption( attracts and holds low molecular weight particles from the water, much like a magnet attracts and holds iron filings) Exposure to chloramines during hemodialysis may cause? - CORRECT ANSWER Hemolysis List some examples of the water contaminants? - CORRECT ANSWER Minerals, sodium, chlorine, nitrate salts, pesticides, impurities from industry, fertilizers, herbicides, fluoride, chloramines( chlorine and ammonia), trace metals and, Microorganisms. What sign/symptom most commonly occur from bacteria/endotoxin exposure? - CORRECT ANSWER Fever and chills Describe the Reverse Osmosis system - CORRECT ANSWER a membrane separation process for removing solutes from a solution. Feed water is pumped under pressure through the semipermeable membrane which removes most contaminants from the water. the RO membrane can reject 95 to 99% of many substances including bacteria viruses, endotoxin, salts, metals and chemicals What are water quality checks done on the water treatment system? - CORRECT ANSWER At the start of the day, before every shift of patient or every 4 hours ( if you do not have set shift) According to AAMI standards bacteria in dialysis water must not exceed what level? - CORRECT ANSWER 200 CFU/ml What is the action level for bacteria? - CORRECT ANSWER 50 CFU/ml According to AAMI standards endotoxin on dialysis water must not exceed what level? - CORRECT ANSWER 2 EU/ml What is the action level for endotoxin? - CORRECT ANSWER 1 EU/ml How often should the RO operating parameters be checked? - CORRECT ANSWER daily What is the most common way that water treatment systems are disinfected? - CORRECT ANSWER Chemical disinfection What substance is added to municipal drinking water supplies in some localities to make the water clearer? - CORRECT ANSWER Alum WHAT IS THE DEVICE THAT ALLOWED MIXED OF COLD OF HOT WATER AND COLD WATER TO A STANDARD TEMPERATURE OF 77-82 DEGREES WHICH HELPS IMPROVE THE WATER QUALITY? - CORRECT ANSWER Blending valve What is the name of the device that prevents treated water from entering the feed water? - CORRECT ANSWER Backflow prevention device When should the water hardness test be done? - CORRECT ANSWER At the end of the day What material is in the carbon tants that attracts chlorine and chloramines? - CORRECT ANSWER Granular activated charcoal How many carbon tanks in a series must a water treatment system have? - CORRECT ANSWER 2 How much EBCT( empty bed contact time) must the carton tanks have ? - CORRECT ANSWER 10 minutes What should the total chlorine level be after the first carbon tank? - CORRECT ANSWER less than 0.1ppm The reverse osmosis must be running for how long before completion of the test for total chlorine level? - CORRECT ANSWER 15 minutes What is the backup system for the RO? - CORRECT ANSWER Deionization tanks there are usually 2 tanks in a series must have resistivity meter that can be heard and seen in the patient care area What is the purpose of an Ultraviolet light in the water treatment system? - CORRECT ANSWER Destruction of microbes what type of filter must follow in line after the Ultraviolet light? - CORRECT ANSWER Submicron and Ultrafilters [Show More]

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