Final answer:
Screening during drinking water purification is indeed a form of filtration and is considered to be (A) true. It is the first step in removing large particulates before the water undergoes further filtration and treatment processes to ensure safety and potability.
Step-by-step explanation:
One type of filtration used in the purification of drinking water is screening. A. True. Screening is a preliminary step in the filtration process that removes large particles from the water. This process is typically followed by more fine filtration where the water passes through layers of sand, gravel, and charcoal to remove smaller particles, thus improving the quality of the water to make it safe for drinking.
Filtration is an essential part of the water treatment process because it ensures that most bacteria, turbidity, odors, and some dissolved solids are removed from the water before it moves to the disinfection stage and then storage. The Safe Drinking Water Act outlines various methods of water treatment to protect public health by regulating the nation's public drinking water supply.