Term
A Watercourse that flows continuously at all times of the year is called ????
A. Intermittent stream
B. Ephemeral Stream
C. Perennial Stream
D. Natural Stream |
|
Definition
|
|
Term
Durig the Night, algae causes the pH of the water to ?????
A. Increase
B. Decrease
C. Remain about the same as during the day
D. Fluctuate up or down depending on the species of algae that dominate |
|
Definition
|
|
Term
Which of the Following contributes to the creation of algae bloms?
A. Increased turbidity
B. Increased air temperature
C. Increased nutrients
D. Increased wind action |
|
Definition
|
|
Term
Which of the following is found mainly in groundwater sources and forms a precipitate when oxidized?
A. Hydrogen sulfide
B. Methane
C. Radon
D. Iron |
|
Definition
|
|
Term
The Riparian Doctrine is sometimes called the ____________?
A. Rule of Reasonable sharing
B. Appropriation Doctrine
C. Allocation of ground water
D. Correlative Rights Rule |
|
Definition
| A. Reasonable Rule of Sharing |
|
|
Term
Which of the following terms is defined as the killing or inactivation of pathogenic organisms in water?
A. Sterilization
B. Pasteurization
C. Disinfection
D. Deactivation |
|
Definition
|
|
Term
Free chlorine residual values are based on a contact time of at least ______?
A. 1 minute
B. 10 minutes
C. 30 minutes
D. 60 minutes |
|
Definition
|
|
Term
What is the typical strength of calcium hypochlorite, i.e., available chlorine range?
A. 5 - 10%
B. 45-50%
C. 65-70%
D. 80-85% |
|
Definition
|
|
Term
The iron content of a raw water is 1.81 mg/L. What is the percent of removal if the finished water contains 0.11 mg/L iron?
A. 17%
B. 20%
C. 60%
D. 94% |
|
Definition
D. 94%
Equation is:
% iron removal = (in - out) X 100%
divided by in |
|
|
Term
Which of the following chemicals will raise pH?
A. Ferric sulfate
B. Soda Ash
C. Alum
D. Carbon Dioxide |
|
Definition
B. Soda Ash
Note: Lime & caustic soda also raise pH |
|
|
Term
Which of the following should be used by an operator to test for residual chlorine?
A. DPD
B. Cresol red
C. Methyl orange
D. Sulfuric acid |
|
Definition
|
|
Term
Which one of the following is a major part of a turbidimeter?
A. Objective nosepiece
B. Reference electrode
C. Aspirator
D. Light source |
|
Definition
|
|
Term
Which of the following parameters is used to indicate the clarity of water?
A. pH
B. Chlorine residual
C. Turbidity
D. Bacteriological |
|
Definition
|
|
Term
pH is a measure of __________?
A. Conductivity
B. Water's ability to neutralize acid
C. Hydrogen ion concentration
D. Dissolved solids |
|
Definition
| C. Hydrogen ion concentration |
|
|
Term
After Chlorination, the free chlorine residual includes:
A. Cl2, CLO2, and HOCl
B. OCl- and HOCl
C. OCl-, HOCl, and Cl2
D. ClO2, HOCI, and OCl- |
|
Definition
|
|
Term
After inital full-service operation, grease lubricated bearings should be regreased at what frequency?
A. Weekly
B. Monthly
C. 3-6 Months
D. Annually |
|
Definition
|
|
Term
Check valves are used to prevent:
A. Excessive pump pressure
B. Priming
C. Water from flowing in two directions
D. Water Hammer |
|
Definition
| C. Water from flowing in two directions |
|
|
Term
If only two rings of packing are used in the stuffing box, the joints should be:
A. Aligned
B. Staggered
C. Large
D. Made of lead |
|
Definition
|
|
Term
Which of the following is a primary function of couplings?
A. Compensate for alignment changes
B. Control motor temperature
C. Reduce shaft wear
D. Lubricate motor |
|
Definition
| A. Compensate for alignment changes |
|
|
Term
What is the correct formula for determining watts?
A. Watts = volts/amps
B. Watts= (horsepower)(Ohms)
C. Watts= resistance/volts
D. Watts= (amps) (volts) |
|
Definition
|
|
Term
Opening the discharge valve one full turn on a chlorine cylinder will ___?
A. Permit maximum discharge
B. Allow a small flow
C. Not enough for efficient operation
D. Not be safe |
|
Definition
| A. Permit maximum discharge |
|
|
Term
What of the following best defines the term "C value"?
A. Effectiveness of a disinfectant at a particular concentration as it relates to the destruction of a particular pathogen
B. Number that describes the smoothness of the interior of a pipe
C. Corro |
|
Definition
| B. Number that describes the smoothness of the interior of a pipe |
|
|
Term
Tubercles can form on which of the following types of pipe?
A. Ductile Iron
B. PVC
C. Asbestos-cement
D. Concrete |
|
Definition
|
|
Term
Which of the following is a primary indicator of bearing failure?
A. Leakage from package
B. Reduced pump discharge
C. Noise from pump
D. Odor from discharge |
|
Definition
|
|
Term
What is the feet of head at the discharge side of a pump that is pumping against a pressure of 100 psi?
A. 12.0 ft
B. 14.6 ft
C. 43.3 ft
D. 231 ft |
|
Definition
D. 231 ft
Solution: (100 psi)(2.31 ft-head/psi) = 231 ft-head |
|
|
Term
Which of the following diseases is capable of being transmitted by water?
A. Typhoid
B. Measles
C. Encephalitis
D. Mumps |
|
Definition
|
|
Term
When any piece of electrical equipment is being worked on, the circuit breaker should be:
A. Painted when repair is complete
B. Videotaped for future reference
C. De-energized and locked-out
D. Replaced |
|
Definition
| C. De-energized and locked-out |
|
|
Term
If ammonia vapor is passed over a chlorine leak in a cylinder valve, the presence of the leak is indicated by a _________?
A. Yellow Cloud
B. White cloud
C. Gray Cloud
D. Brown cloud |
|
Definition
|
|
Term
Which of the following directly impacts the treatment of drinking water?
A. Fair Labor Standards Act
B. Food Security
C. Safe Drinking Water Act
D. Clean Air Act |
|
Definition
| C. Safe Drinking Water Act |
|
|
Term
Corrosive water acting on a customer's plumbing may cause which of the following metals to enter their drinking water?
A. Lead
B. Silver
C. Bismuth
D. Carbon |
|
Definition
|
|
Term
Which of the following is the most common water complaint?
A. Stained laundry & plumbing fixtures
B. Objectional appearance of the water
C. Objectional Taste and/or odor
D. Illnesses alleged to be caused by the drinking water |
|
Definition
| C. Objectional Taste and/or odor |
|
|
Term
According to the Surface Water treatment Rule, water systems serving a population greater than 500 persons must sample the filtered water for turbidity every _______?
A. 1 hour
B. 2 Hours
C. 4 Hours
D. 8 Hours |
|
Definition
|
|
Term
For surface water systems without filtration, the Surface Water Treatment Rule requires public water systems to _____________?
A. Provide coagulation and flocculation
B. Maintain a CxT value above the minimum value
C. Continuously sample for total coli |
|
Definition
| B. Maintain a CxT value above the minimum value |
|
|
Term
Surface water systems must treat, at a minimum, for ___________?
A. Residual chlorine & Giardia
B. Coliform Bacteria & Turbidity
C. Coliform Bacteria & residual chlorine
D. Residual chlorine, turbidity, coliform bacteria, and pH |
|
Definition
| B. Coliform Bacteria & Turbidity |
|
|
Term
What US agency establishes drinking water standards?
A. AWWA
B. USEPA
C. NOISH
D. NSF |
|
Definition
|
|
