Examen de práctica — Water Quality Laboratory Analyst

Question 1

According to Standard Methods, what is the primary reference standard used to calibrate a nephelometric turbidimeter?

Accepted Answer

Formazin

Question 2

Specific conductance (conductivity) is a measure of the ability of an aqueous solution to carry an electric current. To what standard temperature must conductivity measurements be mathematically corrected?

Accepted Answer

25.0 °C

Question 3

For the determination of Total Dissolved Solids (TDS) per Standard Method 2540C, at what temperature is the filtered sample dried?

Accepted Answer

180 ± 2 °C

Question 4

The Threshold Odor Number (TON) is calculated using the formula TON = (A + B) / A. What does "A" represent in this formula?

Accepted Answer

Volume of the sample in mL

Question 5

When measuring the temperature of a water sample according to Standard Methods, what is the required accuracy of the thermometer or thermistor?

Accepted Answer

± 0.1 °C

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