Water Dist
This water-themed quiz will test your knowledge on distances and other measurements when dealing with the fluid. How deep does a trench need to be for it to be shored? This question and much more await within this quiz!
- 1.
When installing service lines, it is a good practice to provide for movement due to soil settling by installing which of the following?
- A.
Bend or gooseneck in the pipe
- B.
Expansion joint
- C.
Flexible coupling
- D.
Service line on the side of the pipe
Correct Answer
A. Bend or gooseneck in the pipe -
- 2.
How many "pounds of pressure (pounds per square inch) equals 100 feet of head?
- A.
25
- B.
39
- C.
43
- D.
86
Correct Answer
C. 43Explanation
2.31 ft per pound so 2.31 ft per pound/100 pounds = 43.290 rounded to 43 pounds of pressure.Rate this question:
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- 3.
The metal strip in an electrical fuse will melt from the heat caused by
- A.
High amperage demands
- B.
Excessive voltage
- C.
Low current
- D.
Low voltage
Correct Answer
A. High amperage demands -
- 4.
A trench must be shored if it is _ feet deep or deeper.
- A.
3
- B.
4
- C.
5
- D.
6
Correct Answer
A. 3 -
- 5.
An approved device used to prevent backflow and backsiphonage is a
- A.
Gate valve
- B.
Check valve
- C.
Surge tank
- D.
Vacuum breaker
Correct Answer
D. Vacuum breaker -
- 6.
Disk type meters are classified as __ meters.
- A.
Compound
- B.
Positive-displacement
- C.
Propeller
- D.
Velocity
Correct Answer
B. Positive-displacement -
- 7.
How many cubic yards of earth are excavated from a trench 36 inches wide, 6 feet deep, and 300 feet long?
- A.
152
- B.
175
- C.
200
- D.
225
Correct Answer
C. 200Explanation
cubic yards = cuft * 0.03704 so with 36 inches w, 6ft deep, and 300 ft long to find the cubic ft of our excavation we first make all measurements the same. 36 in / 12 in per ft = 3ft now to find cuft we take l(300ft)X W(3ft) X h (6ft) = 5400 cuft * 0.03704 to convert to cuyd = 200.016 cuyd rounded to the nearest gives us 200 cubic yards of dirtRate this question:
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- 8.
Distribution system components from various manufacturers are compatible because of
- A.
USEPA regulations
- B.
ISO standards
- C.
AWWA standards
- D.
WEF standards
Correct Answer
C. AWWA standards -
- 9.
The performance curve of a pump reflects
- A.
Pump capacity
- B.
Pump efficiency
- C.
Pump horsepower
- D.
All of the above
Correct Answer
D. All of the above -
- 10.
If the pump bearings on horizontal centrifugal pumps are overlubricated, the most important effect is that the extra lubricant
- A.
Will result in smoother and more efficient operation of the pump
- B.
Will not make any difference in the operation of the pump
- C.
Will be wasted
- D.
May cause overheating and possible failure of the bearings
Correct Answer
D. May cause overheating and possible failure of the bearings -
- 11.
Flexible couplings used to connect the motor and the pump shaft transmit
- A.
Power efficiently and effectively from one shaft to the other
- B.
Wear on bearings to the shaft sleeve
- C.
Shock loads and pulsations.
- D.
Load reversals
Correct Answer
A. Power efficiently and effectively from one shaft to the other -
- 12.
A major break in a water main can assist the distribution operator to
- A.
Determine the effectiveness of the system's thrust blocks.
- B.
Rid the system of air pockets
- C.
Observe the interior condition of the distribution system's piping
- D.
Determine if additional fire hydrants are needed
Correct Answer
C. Observe the interior condition of the distribution system's piping -
- 13.
A portable ladder must extend _ feet above the upper surface of an excavated trench.
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
C. 3 -
- 14.
How long will it take to fill a ground storage tank that holds 150,000 gallons using a pump with a output of 500 gallons per minute?
- A.
2.0 hours
- B.
2.5 hours
- C.
4.0 hours
- D.
5.0 hours
Correct Answer
D. 5.0 hoursExplanation
500 gallons per minute divided into 150,000 gallons shows it would take 300 minutes / 60 min per hour = 5 hoursRate this question:
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- 15.
A Vacuum is formed in the chlorinator by the
- A.
Chlorine cylinder pressure.
- B.
Pressure differential through the ejector.
- C.
Pump
- D.
Rotameter
Correct Answer
B. Pressure differential through the ejector. -
- 16.
The rated flow of a water meter, as stated by the manufacturer, is based on ___ flow.
- A.
Continuous
- B.
Intermittent
- C.
Short-time peak
- D.
None of the above
Correct Answer
A. Continuous -
- 17.
On a switch that has been tagged and locked out, the warning tag must have
- A.
Directions for removing the tag.
- B.
Name of nearest physician to call in case of an emergency
- C.
Name and signature of person who locked out the switch
- D.
Telephone number of electrical supervisor.
Correct Answer
C. Name and signature of person who locked out the switch -
- 18.
In general, a pH of treated water below 6.5 indicates
- A.
High alkalinity
- B.
Free chlorine residual greater than 1.0 mg/l.
- C.
Corrosive water
- D.
High level of total solids.
Correct Answer
C. Corrosive water -
- 19.
When comparing friction loss in various types of pumps, a larger Hazen-Williams C value indicates the pipe
- A.
Is more durable.
- B.
Is rougher outside
- C.
Is smoother inside.
- D.
Is able to withstand a higher pressure.
Correct Answer
C. Is smoother inside. -
- 20.
Generally, a valve exercising program recommends valves be exercised
- A.
Once every 6 months.
- B.
Once every year.
- C.
Once every 2 years
- D.
Not at all.
Correct Answer
B. Once every year. -
- 21.
If water flowing in a 6-inch diameter pipe is discharged into a 4-inch diameter pipe, the velocity will
- A.
Remain the same.
- B.
Increase approximately twice.
- C.
Decrease approximately twice.
- D.
Increase four times.
Correct Answer
B. Increase approximately twice. -
- 22.
A manganese level of about 0.2 mg/l can result in
- A.
Odor problems
- B.
Corrosion.
- C.
Mottling of teeth.
- D.
Staining of toilet fixtures and laundry.
Correct Answer
D. Staining of toilet fixtures and laundry. -
- 23.
Which of the following Safe Drinking Water Act (SDWA) rules provides for action levels instead of maximum contaminant levels (MCLs)?
- A.
Volatile Organic Chemicals
- B.
Total Coliforms
- C.
Lead and Copper
- D.
Surface Water Treatment
Correct Answer
C. Lead and Copper -
- 24.
The most widely used type of prime mover in a pumping station is a
- A.
Diesel engine
- B.
Electric motor
- C.
Gasoline engine
- D.
Steam engine
Correct Answer
B. Electric motor -
- 25.
A ground storage tank is 60 ft wide, 120 ft long, and 12 feet deep. How many gallons of water will it hold?
- A.
86,400
- B.
646,272
- C.
720,576
- D.
800,00
Correct Answer
B. 646,272Explanation
volume = l*W*H so 60ft*120ft*12ft = 86400cuft * 7.48 gallons per cuft = 646,272 gallons.Rate this question:
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- 26.
An illness in infants known as methemoglobinemia is attributed to
- A.
Excessive hardness in the water
- B.
High nitrate content in the water
- C.
Lack of iodine in the water
- D.
Too much iron in the water.
Correct Answer
B. High nitrate content in the water -
- 27.
Hydrostatic pressure testing is the process used to test
- A.
The hydraulics of a system.
- B.
Thrust restraints
- C.
Leakage in the pipe.
- D.
all of the above.
Correct Answer
C. Leakage in the pipe. -
- 28.
Water leaking to the surface after operating an old valve probably is caused by
- A.
A broken stem
- B.
Dried out packing
- C.
Plugged weep holes
- D.
Incomplete seating
Correct Answer
B. Dried out packing -
- 29.
Water hammer is most likely caused by
- A.
Air in the water.
- B.
Closing a valve too fast.
- C.
Hardness of the water.
- D.
Too much water in a reservoir.
Correct Answer
B. Closing a valve too fast. -
- 30.
To repack a buried gate valve, the valve must be
- A.
Removed from service
- B.
Fully closed.
- C.
Of the rising stem type
- D.
Fully open
Correct Answer
B. Fully closed. -
- 31.
Centrifugal pump parts include
- A.
Diaphragm
- B.
Piston
- C.
Rotor
- D.
Volute.
Correct Answer
D. Volute. -
- 32.
Thrust blocks are installed to
- A.
Boost flexible joints
- B.
Boost water pressure.
- C.
Minimize corrosion
- D.
Prevent movement of pipes.
Correct Answer
A. Boost flexible joints -
- 33.
In order to comply with safety regulations, all couplings on pumps must be
- A.
Able to rotate freely.
- B.
Guarded
- C.
Properly aligned
- D.
Tight
Correct Answer
B. Guarded -
- 34.
It is essential to ventilate a valve vault before entry in order to
- A.
Remove excess moisture.
- B.
Equalize temperature and pressure.
- C.
Eliminate foul odors.
- D.
Remove dangerous gases and/or ensure proper oxygen levels
Correct Answer
D. Remove dangerous gases and/or ensure proper oxygen levels -
- 35.
According to the Safe Drinking Water Act, bacteriological samples should be collected at
- A.
Representative points in the distribution system.
- B.
Dead-end mains
- C.
High-risk residences
- D.
All booster stations.
Correct Answer
A. Representative points in the distribution system. -
- 36.
In making a household service connection, the employee finds the 8-inch water main wall is too thin and has to use a ___ to complete the installation.
- A.
Curb stop and box.
- B.
Yoke
- C.
Service clamp
- D.
Setting tee
Correct Answer
C. Service clamp -
- 37.
A noisy and vibrating gate valve indicates
- A.
Water hammer is occurring
- B.
Scaling
- C.
Operating nut is loose
- D.
Cavitation is happening.
Correct Answer
D. Cavitation is happening. -
- 38.
How often should a sealed ball bearing in an electric motor be lubricated?
- A.
Weekly
- B.
Monthly
- C.
Every six months
- D.
Never
Correct Answer
D. Never -
- 39.
A maintenance and inspection program for storage tanks and reservoirs is performed
- A.
As needed
- B.
Annually
- C.
Every other year
- D.
Once every 5 years
Correct Answer
C. Every other year -
- 40.
The term "maximum contaminant level goal (MCLG) means the
- A.
Level of contaminant in drinking water below which there are no known or suspected adverse health effects with a margin of safety
- B.
Maximum allowable level of a given contaminant in drinking water
- C.
Level of a contaminant in drinking water that will trigger a Tier 1 violation.
- D.
Minimum detectable level of a given contaminant
Correct Answer
A. Level of contaminant in drinking water below which there are no known or suspected adverse health effects with a margin of safety -
- 41.
What flow can be expected from a standard 5/8-inch by 3/4-inch meter?
- A.
5 gallons per minute
- B.
10 gallons per minute
- C.
20 gallons per minute
- D.
30 gallons per minute
Correct Answer
C. 20 gallons per minute -
- 42.
The difference between tier 1 and tier 2 violations is
- A.
Tier 1 violations potentially impose direct and adverse health effects; Tier 2 violations do not pose a direct threat to public health
- B.
Tier 1 violations require public notifications; Tier 2 violations do not require public notifications.
- C.
Tier 1 violations are acute; Tier 2 violations are not acute.
- D.
Tier 1 violations have legal consequences; Tier 2 violations do not.
Correct Answer
A. Tier 1 violations potentially impose direct and adverse health effects; Tier 2 violations do not pose a direct threat to public health -
- 43.
Water hammer can be minimized by
- A.
Air release valves and surge tanks.
- B.
Installation of gate valves
- C.
Repair of defective pipes.
- D.
Repair of the pneumatic pump.
Correct Answer
A. Air release valves and surge tanks. -
- 44.
Maintenance required of bubbler tube level indicators includes checking the
- A.
Air tube.
- B.
Float
- C.
Power supply
- D.
Probe
Correct Answer
A. Air tube. -
- 45.
A device used to check flows in a distribution system is called a
- A.
Pressure gauge
- B.
Poly pig
- C.
Flow diffuser.
- D.
Pilot gauge
Correct Answer
D. Pilot gauge -
- 46.
Which of the following would be classified as a positive displacement pump?
- A.
Centrifugal pump
- B.
Jet pump
- C.
Propeller pump
- D.
Reciprocating pump
Correct Answer
D. Reciprocating pump -
- 47.
The pH of water my be reduced by adding
- A.
Carbon dioxide
- B.
Lime
- C.
Oxygen
- D.
Sodium carbonate
Correct Answer
D. Sodium carbonate -
- 48.
Two fundamental treatment requirements for public water systems using surface water sources are
- A.
Coagulation and sedimentation
- B.
Lime softening and disinfection.
- C.
Filtration and aeration
- D.
Disinfection and filtration
Correct Answer
D. Disinfection and filtration -
- 49.
The fire chief has asked you what the flow rate is for a fire hydrant at 5th and oak street. The velocity of the water supply in the hydrant was determined to be 18 feet per second and the pumper connection is 4.5 inches. The flow rate is
- A.
6.15 cubic feet per second
- B.
286 cubic feet per second
- C.
449 gallons per minute
- D.
892 gallons per minute.
Correct Answer
D. 892 gallons per minute.Explanation
flow rate (CFS)= (area sf)(velocity ft/sec)
area = .785 x diameter x diameter so .785*(4.5inches / 12inches per ft = .375)* (.375)= .11
so .11 sqft * 18 fps = 1.987 cuft/sec *448.83 gallons per minute per cuft/sec = 891.8 gallons per minuterRate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 18, 2022Quiz Edited by
ProProfs Editorial Team -
Sep 04, 2010Quiz Created by
Intelspec
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