"fresh pollution" of sanitary significance. What is it?
Choose one answer.
a. ammonia
b. sugar
c. carbon dioxide
d. hydrogen sulfide
ammonia
Question 80
Marks: 1
In distillation, sea water is heated to the boiling point and then into steam, usually under pressure, at a starting
temperature of
Choose one answer.
a. 278 degrees F
b. 260 degrees F
c. 250 degrees F
d. 258 degrees F
258 degrees F
Question 81
What does it mean when a body of water has a high JTU?
a. It has a low amounts of organic matter
b. It has no bacteria
c. No one is swimming at this time
d. It has high turbidity
It has high turbidity
Question 82
Nephelometric Turbidity Units (NTU) are most commonly used to
a. Determine the type of pollution or contamination present in natural waters
b. Estimate the amount of dissolved oxygen in surface waters
, c. Define the strength of waste waters
d. Determine turbidity
Determine turbidity
Question 83
What is the first step in evaluating the safety of a potential water system?
a. The frequency with which source and distribution system water samples are collected
b. A detailed sanitary survey of the water supply
c. The standard plate count for bacterial examination
d. The results of a bacterial chemical examination
A detailed sanitary survey of the water supply
Question 84
What are examples of groundwater systems?
a. Dug, bored, driver, drilled well; rock, sand or earth springs; infiltration galleries
b. Water located no deeper than 400 feet
c. Direct municipal wastewater systems
d. Lake, reservoir, streams, ponds, river and creek supplies
Dug, bored, driver, drilled well; rock, sand or earth springs; infiltration galleries
Question 85
The quality of surface water depends on
a. The use of chemicals for disinfection of drinking water
b. The elimination of coliform organisms
c. The watersheds area drained, land use, location and sources of pollution and the natural agencies of purification
d. The injecting of a chlorine solution into water at its source
The watersheds area drained, land use, location and sources of pollution and the natural agencies of purificatio
Question 86
The hydro pneumatic tank typically contains_____ of its volume as water.
a. 50 percent
b. 80 percent
c. 20 percent
d. Does not contain water only compressed air
20 percent
Question 87
Which of the following is not a practical method for removal of cadmium?
a. Ion exchange
b. Lime softening
c. Reverse osmosis
d. Iron coagulation
Choose one answer.
a. ammonia
b. sugar
c. carbon dioxide
d. hydrogen sulfide
ammonia
Question 80
Marks: 1
In distillation, sea water is heated to the boiling point and then into steam, usually under pressure, at a starting
temperature of
Choose one answer.
a. 278 degrees F
b. 260 degrees F
c. 250 degrees F
d. 258 degrees F
258 degrees F
Question 81
What does it mean when a body of water has a high JTU?
a. It has a low amounts of organic matter
b. It has no bacteria
c. No one is swimming at this time
d. It has high turbidity
It has high turbidity
Question 82
Nephelometric Turbidity Units (NTU) are most commonly used to
a. Determine the type of pollution or contamination present in natural waters
b. Estimate the amount of dissolved oxygen in surface waters
, c. Define the strength of waste waters
d. Determine turbidity
Determine turbidity
Question 83
What is the first step in evaluating the safety of a potential water system?
a. The frequency with which source and distribution system water samples are collected
b. A detailed sanitary survey of the water supply
c. The standard plate count for bacterial examination
d. The results of a bacterial chemical examination
A detailed sanitary survey of the water supply
Question 84
What are examples of groundwater systems?
a. Dug, bored, driver, drilled well; rock, sand or earth springs; infiltration galleries
b. Water located no deeper than 400 feet
c. Direct municipal wastewater systems
d. Lake, reservoir, streams, ponds, river and creek supplies
Dug, bored, driver, drilled well; rock, sand or earth springs; infiltration galleries
Question 85
The quality of surface water depends on
a. The use of chemicals for disinfection of drinking water
b. The elimination of coliform organisms
c. The watersheds area drained, land use, location and sources of pollution and the natural agencies of purification
d. The injecting of a chlorine solution into water at its source
The watersheds area drained, land use, location and sources of pollution and the natural agencies of purificatio
Question 86
The hydro pneumatic tank typically contains_____ of its volume as water.
a. 50 percent
b. 80 percent
c. 20 percent
d. Does not contain water only compressed air
20 percent
Question 87
Which of the following is not a practical method for removal of cadmium?
a. Ion exchange
b. Lime softening
c. Reverse osmosis
d. Iron coagulation
