Imprities in Water 060401f

Question 1

What term is used to describe how many milligrams of a substance are in one litre of water?

Answer 1

Parts per million (ppm)

Question 2

Water quality features can be placed into one of what three catagories?

Answer 2

Physical

Biological

Chemical

Question 3

Pure water should be what?

Answer 3

Tasteless, colourless and oderless

Question 4

Scientists have devised a method of determining whether water has been contaminiated with sewage by identifying and measuring certain bacteria called what?

Answer 4

Fecal coliforms

Question 5

What metals are considered inorganic pollutants?

Answer 5

Mercury, lead, arsenic and cadmium

Question 6

What is the reccomended water supply testing frequency for residential or agricultural applications?

Answer 6

Annually

Question 7

What are the 2 different forms of water testing?

Answer 7

Chemical and bacterial

Question 8

Wayer samples should be taken where?

Answer 8

As near to gue source as possible

Question 9

H2S water testing should be performed where?

Answer 9

Onsite for acurrate results (gas disipates)

Question 10

What is thr acceptable PH range for drinking water?

Answer 10

6.5-8.5

Question 11

What are the most common elements thsy cause water hardness?

Answer 11

Calcium and magnesium

Question 12

Soft water is defined as water having a hardness of less than?

Answer 12

1 gpg

Question 13

What is the maximum amount of iron that can be removed by a softener?

Answer 13

3 ppm

Question 14

Iron content in drinking water should be less than what?

Answer 14

0.3 ppm

Question 15

Chemical free filters facilitate the removal of iron by introducing a small amount of air into the system using a what?

Answer 15

Hydro charger

Question 16

What is required for the rejuvenation of ghr filter media in a chemical free iron filter?

Answer 16

Nothing is required

Question 17

What kind of filter is more effective on higher concentrations of iron in water?

Answer 17

Chemical free iron filter

Question 18

Correction of acidic water can be accomplished by using what?

Answer 18

Either neutralizing filters or a soda ash feeder

Question 19

In applications where TDS levels are high, what can be done to significantly increase water quality?

Answer 19

Demineralization or distillation

Question 20

Bacteria thrive best in waters with what pH range?

Answer 20

6.5-7.5