Water Quality Parameters MCQ with answer and solution

Concept

Field measurement method for water turbidity

Formula

NONE

Step-by-step solution

1. Instruments such as Jackson turbidimeter, Baylis turbidimeter, and Nephelometer are predominantly used in laboratory testing. 2. A turbidity rod is a simple and portable instrument used for rapid measurements directly in the field. 3. Therefore, the turbidity rod is used for measuring turbidity of water in the field. Answer: D

Explanation

A turbidity rod is a portable optical device that uses a calibrated wire at its tip to visually estimate water clarity directly at the sampling site. Unlike laboratory instruments such as nephelometers or Jackson turbidimeters, it requires no electrical power or complex setup, making it ideal for field measurements.

Why the other options are wrong

A) Jackson's turbidimeter cannot measure turbidity below 25 NTU and is a laboratory instrument. B) Baylis turbidimeter is a laboratory device used for measuring low turbidity levels. C) Nephelometer is a precise laboratory instrument based on light scattering principles.

Shortcut

Turbidity Rod is used for quick field measurement of turbidity.

Common mistake

Confusing the turbidity rod used in field testing with laboratory instruments like Jackson or Nephelometer turbidimeters.