unit 5

Question 1

Dewatering of liquid waste is an example of:

Select one:

a. a conversion method of waste disposal.
b. a disposal method of waste handling.
c. a chemical treatment of the waste.
d. a physical treatment of the waste.

Answer 1

d. a physical treatment of the waste.

Question 2

Design deficiencies in a plant can be detected:

Select one:

a. if plant operators know their facility well
b. by having a second engineering firm review the design
c. during annual boiler inspections
d. by conducting regular safety audits

Answer 2

a. if plant operators know their facility well

Question 3

What role does the sun play in the water cycle?

Select one:

a. It allows plants to grow
b. It causes evaporation in bodies of water
c. It allows animal life to exist. This allows respiration to take place
d. It plays a part in photosynthesis

Answer 3

b. It causes evaporation in bodies of water

Question 4

Reclaiming a work site can be very expensive. What is one way of reducing this cost?

Select one:

a. Emergency Response Plans must be followed while operations are being conducted.
b. By using environmentally friendly materials during construction and operation.
c. Incentives can be in place for workers.
d. Conducting plant operations in an environmentally friendly way from the beginning.

Answer 4

d. Conducting plant operations in an environmentally friendly way from the beginning.

Question 5

Ecologically speaking, the food web needs energy to operate. Where does this energy come from?

Select one:

a. the sun
b. animal life
c. the ocean
d. plants

Answer 5

a. the sun

Question 6

What term is connected to the movement of material and substances through the environment?

Select one:

a. biogeochemical
b. regeneration
c. homeostasis
d. hydrogeological

Answer 6

a. biogeochemical

Question 7

With regards to solid pollutants, what is a surface impoundment?

Select one:

a. It is a warehouse where solid pollutants are stored
b. It is part of the conveying system meant to handle solid pollutants
c. It is a pond or lagoon where solid pollutants are stored
d. It is an area to store dry solid pollutants

Answer 7

c. It is a pond or lagoon where solid pollutants are stored

Question 8

Most common processes for the removal of sulfur dioxide from flue gas:
Select one:
a. Produce a useful end product
b. Remove all of the sulphur trioxide as well
c. Involve the use of lime, limestone or sulphuric acid
d. Inject limestone into the furnace

Answer 8

c. Involve the use of lime, limestone or sulphuric acid

Question 9

Flyash is removed from bag filters by a system of:
Select one:
a. Vacuums
b. Electrostatic precipitators 
c. Shakers
d. Rappers

Answer 9

d. Rappers

Question 10

In the biogeochemical cycle, atoms and molecules often change. This results in:

Select one:

a. oxidation
b. new matter
c. energy being released or consumed
d. a surplus of matter

Answer 10

c. energy being released or consumed

Question 11

What is the difference between a settling pond and a cooling pond?

Select one:

a. A cooling pond must be used with a cooling tower.
b. A settling pond is designed to reduce liquid pollution.
c. A settling pond is used only as part of a plant’s cooling water cycle.
d. A cooling pond is used to remove particulate matter from cooling water.

Answer 11

b. A settling pond is designed to reduce liquid pollution.

Question 12

Generally speaking, what are two main general methods for reducing NOx emissions in a plant?

Select one:

a. Prevent or minimize their formation or remove them after they have been generated
b. Use low nitrogen fuel or reduce stack temperatures
c. Using low NOx burners or reducing flame temperatures
d. Remove them from the flue gas or disperse nitrogen absorbers with them

Answer 12

a. Prevent or minimize their formation or remove them after they have been generated

Question 13

Squirrels are herbivores and are also part of the food web. When a squirrel dies, what happens next?

Select one:

a. there is a net gain in matter in the soil
b. energy is released
c. carbon dioxide is released
d. Decomposers break it down into its basic elements

Answer 13

d. Decomposers break it down into its basic elements

Question 14

What are the three reservoirs of the carbon cycle?

Select one:

a. rocks, oceans, atmosphere
b. trees, animals, oceans
c. animals, oceans, atmosphere
d. rocks, plants, atmosphere

Answer 14

a. rocks, oceans, atmosphere

Question 15

Which of the following is the most powerful greenhouse gas?

Select one:

a. Carbon dioxide
b. Fluorinated gases
c. Chlorofluorocarbons
d. Methane

Answer 15

b. Fluorinated gases

Question 16

In what form is the oxygen which supports marine life?

Select one:

a. aqueous
b. solid
c. mineral
d. dissolved

Answer 16

d. dissolved

Question 17

Settling ponds and grease traps are methods used to:

Select one:

a. very effective at removing small colloidal particles from effluent.
b. decrease liquid pollution.
c. remove solid matter from feedwater.
d. are part of all liquid treatment facilities.

Answer 17

b. decrease liquid pollution.

Question 18

What is an example of an unplanned impact that a plant may have on the environment?

Select one:

a. normal stack emissions
b. airborne particulate released to atmosphere
c. solid waste disposal
d. hazardous liquids leaking into groundwater

Answer 18

d. hazardous liquids leaking into groundwater

Question 19

An example of a chemical treatment of liquid waste is:

Select one:

a. sedimentation
b. anaerobic digestion
c. coagulation
d. incineration

Answer 19

c. coagulation

Question 20

Whether or not solid waste can be re-used or not depends on:

Select one:

a. the type of fuel used in the process
b. whether the waste is wet or dry
c. the market for it
d. the composition of the ash

Answer 20

d. the composition of the ash