FE Environmental Water/Wastewater

Which of the following is generally NOT attributable to hard water?

a) scum rings in bathtubs

b) stains on porcelain bath fixtures

c) foam in clothes-washing equipment

d) scale buildup in boiler tubes

c) foam in clothes-washing equipment

Harness in natural water is caused by the presence of which of the following?

a) weakly acidic ions

b) nitirites and nitrates

c) polyvalent metallic cations

d) colloidal solids

c) polyvalent metallic cations

In aquatic systems, phosphorus recycling is significantly aided by which of the following?

i. algae

ii. fungi

iii. macrophytes

iv. phytoplankton

i. algae

iii. macrophytes

iv. phytoplankton

Which of the following are sources of color in water?

i. copper ions

ii. iron ions

iii. manganese ions

iv. industrial colloidal solids

all

Which of the following processes is used to measure the amount of acid in water?

a) titration

b) filtration

c) spectrophotometry

d) digestion

a) titration

The National Primary Drinking Water Regulations apply to every public water supply serving at least how many service connections?

a) 15

b) 50

c) 100

d) 250

a) 15

The molar nitrogen to phosphorus (N:P) ratio for ideal algae growth is which of the following?

a) 10:1

b) 12:1

c) 16:1

d) 18:1

c) 16:1

In water, excess amount of which of the following can contribute to blue baby syndrome?

a) phosphorus

b) manganese

c) carbonates

d) nitrates

d) nitrates

How many pollutants are listed by the EPA as criteria pollutants and used to assess air quality? And what are they?

a) 2

b) 6

c) 10

d) 13

b) 6

Ozone, Carbon Monoxide, Nitrogen Dioxide, Sulfur Dioxide, Particulate matter, Lead

At maximum demand, water in a municipal drinking water supply is generally delivered with a minimum pressure of

a) 15 psi

b) 25 psi

c) 40 psi

d) 75 psi

b) 25 psi

What ch