Texas Class D Water Operator 2024 State License Test || All Questions & Answers (100% Correct)

Texas Class D Water Operator 2024 State License Test || All Questions & Answers (100% Correct) Texas Class D Water Operator 2024 State License Test || All Questions & Answers (100% Correct) What are some physical characteristics of water? - ANSWER - Temperature, turbidity, color, taste, odor What are some chemical characteristics of water? - ANSWER - Hardness, pH, solids, and gases What is turbidity? - ANSWER - the amount of suspended matter, such as clay, silt, organic matter, and microorganisms in water T/F Water is never found pure in nature. - ANSWER - True Is turbidity more of a problem in groundwater or surface water? - ANSWER - Surface water A system's filtered water must be _______ Nephelometric Turbidity Units (NTU) or less in at least 95% of the measurements taken each month, and no sample can exceed _____ NTU. - ANSWER - 0.3 1 T/F True color is dissolved in water (in solution) and cannot be removed by filtering. - ANSWER - True. Tea in water is an example of true color. Suspended color is called _______ color. - ANSWER - apparent Color above ______ units is objectionable in a public water supply. - ANSWER - 15 units A scale called the ________ measures odor. - ANSWER - Threshold Odor Number (TON) Odor greater than a scale of _______ is undesirable. - ANSWER - 3 Taste and odors in water result from _______, bacteria, decaying organic matter, gases, and chemicals such as manganese, zinc, copper, iron, magnesium, sodium, and potassium. - ANSWER - algae Chemical characteristics of water generally cannot be detected by sight, smell, or taste and must be determined by __________. - ANSWER - laboratory analysis Chemical laboratory analysis must be sampled _______ per year for surface water and normally _______ for groundwater. - ANSWER - once/year for surface water once every three years for groundwater Water weighs ______ lbs/gal. - ANSWER - 8.34 lbs/gal