Answers to More Distribution Questions
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The purpose of the USEPA Ground Water Rule is to reduce disease incidence associated with disease-causing microorganisms in
A. Drinking water
B. Non-point sources
C. Storm water
D. Wastewater
Source: USEPA Ground Water Rule, http://www.epa.gov/safewater/disinfection/gwr/regulation.html
The correct answer is A. Drinking Water
The USEPA Groundwater Rule becomes effective on
A. December 1, 2009
B. July 1, 2010
C. December 1, 2010
D. July 1, 2011
Source: Iowa Department of Natural Resources' Water Supply Listserv - November 10, 2009
The correct answer is A. December 1, 2009
What is the minimum recommended pressure in a water distribution system? What is this equivalent to in feet of head?
Minimum pressure is 20 psi
20 psi x 2.31 ft/psi = 46.2 ft of head
Chlorine ton cylinders at room temperature will deliver gas at a maximum rate of
150 lb cylinders Ton Containers
A. 10 pounds per day 100 pounds per day
B. 25 pounds per day 250 pounds per day
C. 40 pounds per day 450 pounds per day
D. 150 pounds per day 2000 pounds per day
The correct answer is C
Which of the following valves only permits flow to move in one direction?
A. Butterfly
B. Check
C. Gate
D. Plug
The correct answer is B
The specific gravity of chlorine gas is
A. 1
B. Greater than 1
C. Less than 1
The correct answer is B
|
Matching |
|
|
1. Calcium |
A. C |
|
2. Carbon |
B. S |
|
3. Chlorine |
C. P |
|
4. Copper |
D. K |
|
5. Fluorine |
E. O |
|
6. Iron |
F. Na |
|
7. Hydrogen |
G. N |
|
8. Lead |
H. Mg |
|
9. Magnesium |
I. Ca |
|
10. Manganese |
J. Cl |
|
11. Nitrogen |
K. Cu |
|
12. Potassium |
L. Mn |
|
13. Sodium |
M. Fe |
|
14. Oxygen |
N. H |
|
15. Phosphorus |
O. Pb |
|
16. Sulfur |
P. Fl |
1. I
2. A
3. J
4. K
5. P
6. M
7. N
8. O
9. H
10. L
11. G
12. D
13. F
14. E
15. C
16. B
Which of the following is correct?
A. A is the follower and B is the lantern ring
B. A is the lantern ring and B is a packing ring
C. A is a packing ring and B is the lantern ring
D. A is a packing ring and B is the follower
The correct answer is C. A is a packing ring and B is the lantern ring
pH measures
A. H+
B. OH-
C. O2
D. Phosphorus
The correct answer is A. H+ -- pH measures the hydrogen ion concentration
How do you know that your pump is cavitating?
A. It doesn't sound right
B. It runs hot
C. It won't start
D. All of the above
The correct answer is A. It doesn't sound right.
A pump that's cavitating sounds like it's pumps rocks or gravel.
A chlorine atom is composed of
A. Electrons
B. Neutrons
C. Protons
D. All of the above
The correct answer is D. All of the Above
Throttling the discharge valve on a centrifugal pump will the likely ______ temperature of the motor and ______ the temperature of the pump
A. Increase, increase
B. Increase, reduce
C. Reduce, increase
D. Reduce, reduce
The correct answer is C. Reduce, increase
A, B, and D are incorrect because throttling the discharge valve on a centrifugal pump will the likely reduce temperature of the motor and increase the temperature of the pump
The chemical symbol for chlorine gas is
A. Cl
B. Cl-
C. Cl2
D. HOCl
The correct answer is C. Cl2
A is incorrect because this is chemical symbol for chlorine not chlorine gas
B is incorrect because this is the chemical symbol for chloride
D is incorrect because this is the chemical formula for hypochlorite
Which of the following is the indicator used for pathogens?
A. Amoebic dysentery
B. E. coli
C. Salmonella typhosa
D. V. comma
The correct answer is B. E. coli
A is incorrect because this is a pathogen, not an indicator
C is incorrect because this is a pathogen (cholera), not an indicator
D is incorrect because this is a pathogen (typhoid), not an indicator
Pump suction and discharge pressures are usually measured in
A. gpm
B. kWh
C. mg/L
D. psi
The correct answer is D. psi
A is incorrect because this is a measure of flow
B is incorrect because this is a measure of energy used
C is incorrect because this is a measure of concentration
Which of the following is the correct formula for chlorine in water?
A. Cl2 + H2O → HOCl + HCl
B. NaOCl + H2O → HOCl + NaOH
C. Ca(OCl)2 + 2H2O → 2HOCl + Ca(OH)2
D. HOCl → H+ + OCl-
E. All of the above
The correct answer is E. All of the Above
The PE for flow is _____ gpcd.
A. 7.48
B. 8.34
C. 150
D. 250
The correct answer is C. 150 gpcd
A is incorrect because this is the conversion factor from cubic foot to gallon
B is incorrect because this is the conversion factor between gallon and pounds
D is incorrect because a breakdown in the disinfection process would lead to high levels of pathogens
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