The rate at which a fluid progresses fro a spilled area is governed by its:

The rate at which a fluid progresses fro a spilled area is governed by its:

a. pH
b. density
c. viscosity
d. thickness
e. weight

Answer: C

One pollutant that is particularly harmful to earth's ozone layer is otherwise known as:

One pollutant that is particularly harmful to earth's ozone layer is otherwise known as:

a. DOT's
b. PVC's
c. BOD's
d. CFC's
e. PCB's

Answer: D

Hazardous liquid should be handles according to information supplied on:

Hazardous liquid should be handles according to information supplied on:

a. general safety reports
b. progress reports
c. Material Safety Data Sheets
d. plant operation manuals
e. Occupational Health and Safety Regulations

Answer: C

The two main growth nutrients carried by domestic sewage are:

The two main growth nutrients carried by domestic sewage are:

a. sulphates and nitrates
b. nitrates and phosphates
c. phosphates and sulphates
d. sulphates and suspended solids
e. sludge and dissolved solids

Answer: B

The pH of industrial effluent can be controlled:

The pH of industrial effluent can be controlled:

a. by the addition of acid
b. by the addition of alkaline
c. by the addition of water
d. by the use of settling ponds
e. by the addition of acid or alkaline as required

Answer: E

Hazardous material is not a problem unless

Hazardous material is not a problem unless

a. a loss of product is experienced
b. a loss of control is experienced
c. it is noticed b the operating personnel
d. it is present in the environment
e. it is present in the ecosystem

Answer: B

The ability of water to dissolve oxygen

The ability of water to dissolve oxygen

a. increases with the increase in water temperature
b. decreases with the increase in water temperature
c. decreases with the decrease in water temperature
d. does not change with the temperature
e. none of the listed items

Answer: B

Phosphates are a common chemical found in:

Phosphates are a common chemical found in:

a. groundwater
b. detergents
c. plant effluent
d. settling ponds
e. sludge

Answer: B

Water that exists in the soil and rock formation is known as:

Water that exists in the soil and rock formation is known as:

a. tap water
b. contaminated water
c. surface water
d. soil water
e. ground water

Answer: E

Chemical emulsions can be removed by:

Chemical emulsions can be removed by:

a. settling
b. additives
c. centrifugal action
d. gravity
e. all of these

Answer: E

Thermally separated layers in lakes are called;

Thermally separated layers in lakes are called;

a. anticlines
b. inclines
c. temperature gradients
d. thermoclines
e. temperature layers

Answer: D