FE Exam

if told to ignore friction losses in fluids problems,

Let C = 1

The elevation to which water will rise in a piezometer tube:

Hydraulic grade line

Entrance losses between tank and pipe, or losses through elbows, fittings and

valves are generally expressed as functions of:

Kinetic energy

The transition between laminar and turbulent flow occurs at what Reynolds’s number?

2100

What is the plasticity index?

liquid limit - plastic limit, a higher PI indicates a larger clay content

D_# refers to

the particle size with #% passing a specific sieve

What is turbidity?

cloudiness of water body or sample

color of pure water?

colorless/clear

what chemicals are the main causes of eutrophication? (excessive algae growth in water)

nitrogen and phosphorous

the required amount of acid necessary to bring the pH level of water to a pH ranging from 4.3 to 4.8 is called:

total alkalinity

Conductivity and total dissolved solids levels have a …

linear correlation

What chemicals are the major contributors to water hardness

Calcium and magnesium

What is the turbidity of a clear water sample?

1 NTU

Why is it important to know the amount of natural organic matter in a sample?

because when NOM and chlorine react, harmful by products can form

Suspended solids are retained by what size filter paper?

2 microns