Water CCHT Test QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025, Exams of Water Resources Planning and Management

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Water CCHT Test QUESTIONS WITH

COMPLETE 100% VERIFIED

SOLUTIONS 2024/

What are the two main reason for treating the water used for hemodialysis? preventing harm to the patient and preventing damage to the RO system List the contaminants in the water that are living creatures? Bacteria and viruses What are the usual way that water becomes contaminated? The process of acid rain, surface water from lakes, ponds, rivers and reservoris. Define endotoxin 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? 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? monthly Why is water considered safe for drinking not necessarily safe for hemodialysis? Patient are exposed to very large volumes of water during dialysis. What contaminants are removed by the carbon tants? 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? Hemolysis List some examples of the water contaminants? 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? Fever and chills Describe the Reverse Osmosis system 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? 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? 200 CFU/ml What is the action level for bacteria? 50 CFU/ml According to AAMI standards endotoxin on dialysis water must not exceed what level? 2 EU/ml What is the action level for endotoxin? 1 EU/ml How often should the RO operating parameters be checked? daily What is the most common way that water treatment systems are disinfected? Chemical disinfection What substance is added to municipal drinking water supplies in some localities to make the water clearer? 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? Blending valve What is the name of the device that prevents treated water from entering the feed water? Backflow prevention device When should the water hardness test be done? At the end of the day What material is in the carbon tants that attracts chlorine and chloramines? Granular activated charcoal How many carbon tanks in a series must a water treatment system have? 2 How much EBCT( empty bed contact time) must the carton tanks have? 10 minutes What should the total chlorine level be after the first carbon tank? less than 0.1ppm The reverse osmosis must be running for how long before completion of the test for total chlorine level?

15 minutes What is the backup system for the RO? 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? Destruction of microbes what type of filter must follow in line after the Ultraviolet light? Submicron and Ultrafilters