SAMPLE QUESTIONS Flashcards
(59 cards)
1
Q
Which of the following constitutes most common form of cross connection? A. irrigation system B. Garden hose C. fire protection system D. raw sewer lift station
A
B. Garden hose
2
Q
Reverse flow of water within a pipe created by a difference in water pressure is: A. Backflow B. Backsiphonage C. Back pressure D. Cross-connection
A
A. Backflow
3
Q
The maximum height in which water will rise in a perfect vacuum is: A. 2.31 ft. B. 17 ft. C. 33.9 ft. D. None of the above
A
C. 33.9 ft.
4
Q
The absolute minimum pressure that a water system should maintain at all times is" A. 65 PSI B. 35 PSI C. 25 PSI D. 20 PSI
A
D. 20 PSI
5
Q
A group of bacteria found in the intestines of warm blooded animals when found in water is an indication that the water is polluted and may contain pathogenic organisms. A. Salmonella B. Coliform C. Cryptosporidium D. Trihalomethanes
A
B. Coliform
6
Q
A cubic foot of water weighs: A. 7.48 lbs. B. 8.34 lbs. C. 62.4 lbs. D. 27 lbs.
A
C. 62.4 lbs.
7
Q
A connection between a potable water supply and an non-potable source is known as: A. An inter-connection. B. Inter-tie. C. By-pass D. Cross-Connection
A
D. Cross-Connection
8
Q
In 1970 the US congress passed an act to establish minimum health and safety standards. This act is know as:
A. Occupational Safety and Health Act.
B. Accidental Health and Safety act.
C. National Health and Safety Council Act.
D. Uniform Code of Safety and Health.
A
A. Occupational Safety and Health Act.
9
Q
The most common type of residential meter used today is: A. Turbo B. Compound C. Displacement D. Venturi
A
B. Compound
10
Q
Beam breakage of a water pipe may occur when a pipe:
A. It is not restrained.
B. Is unevenly supported along its length.
C. Is not belled up properly.
D. Has high velocity rates.
A
B. Is unevenly supported along its length.
11
Q
Ductile iron pipe is preferred over Gray Cast iron because: A. It lasts longer. B. It is lighter. C. It is less rigid. D. Both B and C.
A
D. Both B and C.
12
Q
An electrical system for prevention of rust, corrosion, and pitting of piping surface: A. Cathodic protection. B. Galvanic protection. C. Anode protection. D. Electrolysis.
A
A. Cathodic protection.
13
Q
Which of the following types of pipe is usually less expensive in larger sizes? A. PVC B. Cast Iron C. Concrete D. Asbestos Cement
A
C. Concrete
14
Q
Which of the following pipe joints is not routinely installed as a buried joint? A. Mechanical joint B. Lead joint C. Flanged joint D. Ball and Socked joint
A
C. Flanged joint
15
Q
A major cause of underground construction death is:
A. Improper confined space entry.
B. Lack of shoring and shoring failure.
C. Using no dewatering system.
D. Having no ladder available for a existing trench.
A
B. Lack of shoring and shoring failure.
16
Q
When excavating less than 5 feet deep, the spoil should be placed how many feet from the edge of excavation. A. 2 ft. B. 5 ft. C. 10 ft. D. Should be hauled away.
A
A. 2 ft.
17
Q
Where should thrust blocks be used? A. When the ground soil is wet. B. Where the pipeline changes direction. C. Where flanged joints are used. D. Both A and C.
A
B. Where the pipeline changes direction.
18
Q
Chlorine concentrations in water are measured in: A. pH B. PPM C. TDS D. MCL
A
B. PPM
19
Q
Why are wet taps preferred? A. Keeps the tapping bit cool. B. Makes tapping easier. C. No need to lubricate the tapping bit. D. Water service is not interrupted.
A
D. Water service is not interrupted.
20
Q
Which of the following is the most common type of valve used in distribution system? A. Butterfly B. Gate C. Ball D. Rotary
A
B. Gate
21
Q
The main valve on a dry barrel fire hydrant is located: A. In the foot B. At the nozzle outlets C. At the main D. In the bonnet
A
A. In the foot
22
Q
Which of the following would not be a more common water borne disease? A. Dysentery B. Typhoid C. Cholera D. Polio
A
D. Polio
23
Q
What agent is responsible for reporting lab results to the regulatory agency? A. Water system owner B. Board of Health chairperson C. Lab technician D. Sample collector
A
A. Water system owner
24
Q
What federal law is designed to protect the safety and health of operators? A. OSHA B. FMLA C. FLSA D. ADEA
A
A. OSHA
25
```
10. What federal law regulates public water supplies?
A. Safe Drinking Water Act
B. Clean Water Act
C. Taft-Hartley Act
D. Standard Methods
```
A. Safe Drinking Water Act
26
```
What causes water to move through pores in soil and rocks?
A. Temperature
B .Viscosity
C. Barometric pressure
D. Gravity
```
D. Gravity
27
12. What is a commonly used indicator of possible health problems found in plants, soil, water and the
intestines of humans and warm-blooded animals?
A. Viruses
B. Coliform bacteria
C. Intestinal parasites
D. Pathogenic organisms
B. Coliform bacteria
28
```
. What are disease producing bacteria called?
A. Parasites
B. New strain
C. Sour type
D. Pathogenic
```
D. Pathogenic
29
```
What are the two main causes of hardness in water?
A. Gold and silver
B. Calcium and magnesium
C. Phosphate and nitrate
D. Oxygen and methane
```
B. Calcium and magnesium
30
```
15. Which source of water has the greatest natural protection from bacterial contamination?
A. Shallow well
B. Deep well in gravel
C. Surface water
D. Spring
```
B. Deep well in gravel
31
```
What device measures the flow rate of gases?
A. Parshall flume
B. Rotameter
C. Float
D. Weir
```
B. Rotameter
32
17. How often should preventive maintenance for equipment be performed?
A. Once every week
B. After a breakdown
C. According to manufacturer recommendations
D. When time permits
C. According to manufacturer recommendations
33
Dynamic head is best described as the
A. Velocity of water in a main at full pumping pressure
B. Total energy that a pump must develop for pumping to take place
C. Total pressure in feet of head, measured at the pump discharge during periods of rest in the
system
D. Pumping end of any device used to force water into a pressure system
B. Total energy that a pump must develop for pumping to take place
34
Which of the following terms refers to excessive internal pressure, which may be several times the normal
operating pressure and can seriously damage hydropneumatic tanks, valves, and the piping network?
A. Air charge
B. Flow rate pressure
C. Water hammer
D. Hydraulic charge
C. Water hammer
35
```
Most pumps must be primed before startup in order to
A. Calculate flow rate
B. Prevent reverse flow
C. Start the flow of water
D. Prevent hammer
```
C. Start the flow of water
36
What is the purpose of a check valve?
A. Regulate the rate of flow through the discharge pipe
B. Act as automatic shutoff valve when the pump stops
C. Permit air to escape from the pipe
D. Prevent clogging of the suction line
B. Act as automatic shutoff valve when the pump stops
37
```
What is the primary purpose of a preventive maintenance program?
A. Increase the use of backup equipment
B. Correct equipment breakdowns
C. Eliminate inventory of spare parts
D. Avoid future equipment problems
```
D. Avoid future equipment problems
38
```
A mixture of air and gas is considered hazardous when the mixture exceeds what percentage of the lower
explosive limit (LEL)?
A. 0%
B. 3%
C. 7%
D. 10%
```
D. 10%
39
26. What are the most important methods of ensuring operator safety?
A. Appointing a safety officer and administrator
B. Alerting operators of unsafe acts and conducting mandatory safety training
C. Providing handbooks and copies of regulations
D. Working with proper light and ventilation
B. Alerting operators of unsafe acts and conducting mandatory safety training
40
27. What safety procedure should an operator always follow when mixing a solution of sodium hypochlorite
(liquid bleach) and fresh water?
A. Attend a training course on liquid chlorine from an accredited school
B. Wear gloves and a mask when opening the containers of bleach
C. Ask a second individual to stand nearby with an emergency breathing apparatus
D. Wear goggles and gloves when handling hypochlorite
D. Wear goggles and gloves when handling hypochlorite
41
```
28. Which form of hypochlorite is the most dangerous to handle?
A. Sodium
B. Fluoride
C. Calcium
D. Chlorine
```
C. Calcium
42
What are the two most important safety concerns when entering a confined space?
A. Corrosive chemicals and falls
B. Bad odors and claustrophobia
C. Extreme air temperatures and slippery surfaces
D. Oxygen deficiency and hazardous gases
D. Oxygen deficiency and hazardous gases
43
```
What piece of safety equipment must an operator wear when entering a confined space?
A. Boots
B. Harness
C. Gloves
D. Goggles
```
B. Harness
44
```
Which document provides a profile of hazardous substances?
A. CERCLA
B. SARA
C. CFR
D. MSDS
```
D. MSDS
45
. What safety measure must an operator follow prior to working on electrical equipment?
A. Lock out and tag out all electrical switches
B. Put on canvas gloves
C. Remove fuses from switch box
D. Tell one coworker not to turn on the switch
A. Lock out and tag out all electrical switches
46
```
What is the correct procedure for mixing acid and water?
A. Water is added slowly to the acid
B. Acid is added slowly to the water
C. Water is added quickly to the acid
D. Acid is added quickly to the water
```
B. Acid is added slowly to the water
47
What is the purpose of a pump guard?
A. Allows operators to turn off pump in emergency situations
B. Notifies operators of excessive temperatures
C. Allows operators to pump against a closed discharge valve
D. Protects operators from rotating parts
D. Protects operators from rotating parts
48
```
The most important responsibility of an operator is to provide
A. Adequate water pressure
B. Palatable drinking water
C. Adequate amounts of water
D. Safe drinking water
```
D. Safe drinking water
49
To ensure that the water supplied by a public water system meets federal and state requirements, the water
system operator must regularly collect samples and
A. Test the water at the nearest water testing laboratory
B. Determine a sampling schedule based on the lab's recommendations
C. Send all analysis results to the State periodically
D. Count the number of active wells in the system
C. Send all analysis results to the State periodically
50
```
The major source of error when obtaining water quality information is improper
A. Sampling
B. Preservation
C. Tests of samples
D. Reporting of data
```
A. Sampling
51
```
A composite sample should never be used when sampling for which contaminant?
A. Benzene
B. Nitrate
C. Barium
D. Bacteria
```
D. Bacteria
52
```
When should water quality samples for chlorine residual be analyzed?
A. Immediately
B. Within 1 hour
C. Within 8 hours
D. Within 24 hours
```
A. Immediately
53
```
How many coliform samples are required per month for a water system serving a population between 25
and 100?
A. 1
B. 2
C. 3
D. 4
```
A. 1
54
```
Water laboratory test calculations and results use which system?
A. English
B. Metric
C. SWAG
D. British
```
B. Metric
55
```
44. What is the chemical formula for sulfuric acid?
A. SA2
B. H2SO4
C. NaOH
D. H2O
```
B. H2SO4
56
```
46. Which of the following are two types of samples?
A. Dessicator and gooch
B. Wet and dry
C. Buret and flask
D. Grab and composite
```
D. Grab and composite
57
```
What two types of devices are used to collect samples?
A. Left and right
B. Upper and lower
C. Automatic and manual
D. Gas and diesel
```
C. Automatic and manual
58
```
How should samples that cannot be analyzed immediately be maintained until the analysis is conducted?
A. Shaken every hour
B. Preserved
C. Held in an open container
D. Stored bottom up
```
B. Preserved
59
```
What is the most common method used in labs to test for total coliform and E. coli?
A. DMA
B. Green
C. Colilert
D. Lamp
```
C. Colilert
