WATER DISTRIBUTION TESTBANK
QUESTIONS WITH 100% CORRECT
ANSWERS
When PVC pipe is stacked loose, it should not be stacked more than how high?
a.) 2.0 feet
b.) 3.0 feet
c.) 5.0 feet
d.) 7.5 feet - Answer-b.) 3.0 feet
Which is the most common cause for pipe joint failure (leaking) in newly laid pipe?
a.) The use of a cracked gasket
b.) Not pushing the spigot end the full distance into the bell
c.) Not having the joint completely clean
d.) An incorrect trench bedding angle - Answer-c.) Not having the joint completely clean
Compression fittings used with copper or plastic tubing seal by means of a:
a.) Beveled sleeve
b.) Compression ring
c.) Compressed beveled gasket
d.) Compressed o-rings located at either end of the fitting's beveled neck - Answer-c.)
Compressed beveled gasket
Thrust from a water surge almost always acts ______ to the inside surface that it
pushes against.
a.) Vertically
b.) Horizontally
c.) Perpendicular
d.) Vertically and horizontally - Answer-c.) Perpendicular
Which device serves the same function as the packing?
a.) Inline suction gland
b.) Packing gland
c.) Mechanical seal
,d.) Lantern seal - Answer-c.) Mechanical seal
Which is used to stop air leakage into the casing around the pump shaft?
a.) Packing gland
b.) Lantern ring
c.) Seals
d.) Shaft sleeves - Answer-c.) Seals
Which is at the top the stuffing box?
a.) Packing gland
b.) Lantern ring
c.) Mechanical seal
d.) Seal cage - Answer-a.) Packing gland
Which assembly holds the lantern ring and packing?
a.) Shaft assembly
b.) Casing ring assembly
c.) Packing gland box
d.) Stuffing box - Answer-d.) Stuffing box
Water hammer can be described as:
a.) Particle waves
b.) Acoustic waves
c.) Rogue waves
d.) Longitudinal waves - Answer-b.) Acoustic waves
When fully opened, which valve will have the highest head loss?
a.) Gate valve
b.) Plug valve
c.) Globe valve
d.) Ball valve - Answer-c.) Globe valve
Which type of pressure sensor uses a wire fastened to a diaphragm?
a.) Bellows sensor
b.) Strain gauge
c.) Helical sensor
d.) Diaphragm element - Answer-b.) Strain gauge
Why is it so important to monitor the speed of a variable speed pump?
,a.) To prevent excessive temperatures from developing
b.) To prevent vibration from developing
c.) To prevent speed oscillation from occurring
d.) To prevent cavitation from occurring - Answer-d.) To prevent cavitation from
occurring
Which basic electrical unit is used to measure a material's opposition to the flow of
electricity?
a.) Ampere
b.) Ohm
c.) Volts
d.) Resistance or impedance - Answer-b.) Ohm
Potable water may be defined as:
a. Any water that occasionally may be polluted from another source
b. Any water that, according to recognized standards, is safe for consumption
c. Water high in organic content
d. Water that has been transported from outside the service area - Answer-b). Any
water that according to recognized standard is safe for human consumption.
To prevent the entry of surface contamination into a well is the purpose of:
a. The well casing
b. The louvers or slots
c. Well development
d. The sanitary seal - Answer-d) The Sanitary Seal
Pure water will exhibit a pH value of?
a. 0.0
b. 7.0
c. 10.5
d. 14.0 - Answer-b) 7.0
A pH reading of 6.0 units indicates that the water sample is:
a. Very acidic
b. Slightly alkaline
c. Very alkaline
d. Slightly acidic - Answer-d) Slightly Acidic
In drinking water quality, "TDS" is the abbreviation for?
a)Total digestable substances
, b) Total dissolved solids
c) Time-delayed sicknesses
d) Terminal diseases started - Answer-b) Total Dissolved Solids
In drinking water regulations, the abbreviation "MCL" stands for?
a) Maximum contaminant level
b) Multiple constituent levels
c) Most common level
d) Minimum considered legal - Answer-a) Maximum contaminant level
The MBAS method is used to determine levels of which of the following drinking water
constituents? - Answer-Forming Agent
In water quality, the symbol "mg/L" is equivalent to:
a. Micrograms per liter
b. Parts per million
c. Parts per billion
d. Mostly good levels - Answer-b) Parts per million
The term "clearwell" refers to a? - Answer-Reservoir at the outlet of a water treatment
plant.
A mechanical device often employed to prevent the over-filling and/ on over-draining of
distribution system reservoir is the? - Answer-Altitude Valve
The primary cause of water quality deterioration in distribution system is? - Answer-
Water age
The top of the pipe is called? - Answer-Soffit
The term "Springline" applies to? - Answer-The midline of a pipeline
When possible, a water main should be tapped while still pressurized to? - Answer-
Minimize contamination risk
A connection made into a water main that is full of under pressure is called a?
a. Cross connection
b. Valve box
c. Wet tap
d. Spinal tap - Answer-c) Wet tap
A special valve that is used almost exclusively to facilitate making connections to
pipeline is the?
QUESTIONS WITH 100% CORRECT
ANSWERS
When PVC pipe is stacked loose, it should not be stacked more than how high?
a.) 2.0 feet
b.) 3.0 feet
c.) 5.0 feet
d.) 7.5 feet - Answer-b.) 3.0 feet
Which is the most common cause for pipe joint failure (leaking) in newly laid pipe?
a.) The use of a cracked gasket
b.) Not pushing the spigot end the full distance into the bell
c.) Not having the joint completely clean
d.) An incorrect trench bedding angle - Answer-c.) Not having the joint completely clean
Compression fittings used with copper or plastic tubing seal by means of a:
a.) Beveled sleeve
b.) Compression ring
c.) Compressed beveled gasket
d.) Compressed o-rings located at either end of the fitting's beveled neck - Answer-c.)
Compressed beveled gasket
Thrust from a water surge almost always acts ______ to the inside surface that it
pushes against.
a.) Vertically
b.) Horizontally
c.) Perpendicular
d.) Vertically and horizontally - Answer-c.) Perpendicular
Which device serves the same function as the packing?
a.) Inline suction gland
b.) Packing gland
c.) Mechanical seal
,d.) Lantern seal - Answer-c.) Mechanical seal
Which is used to stop air leakage into the casing around the pump shaft?
a.) Packing gland
b.) Lantern ring
c.) Seals
d.) Shaft sleeves - Answer-c.) Seals
Which is at the top the stuffing box?
a.) Packing gland
b.) Lantern ring
c.) Mechanical seal
d.) Seal cage - Answer-a.) Packing gland
Which assembly holds the lantern ring and packing?
a.) Shaft assembly
b.) Casing ring assembly
c.) Packing gland box
d.) Stuffing box - Answer-d.) Stuffing box
Water hammer can be described as:
a.) Particle waves
b.) Acoustic waves
c.) Rogue waves
d.) Longitudinal waves - Answer-b.) Acoustic waves
When fully opened, which valve will have the highest head loss?
a.) Gate valve
b.) Plug valve
c.) Globe valve
d.) Ball valve - Answer-c.) Globe valve
Which type of pressure sensor uses a wire fastened to a diaphragm?
a.) Bellows sensor
b.) Strain gauge
c.) Helical sensor
d.) Diaphragm element - Answer-b.) Strain gauge
Why is it so important to monitor the speed of a variable speed pump?
,a.) To prevent excessive temperatures from developing
b.) To prevent vibration from developing
c.) To prevent speed oscillation from occurring
d.) To prevent cavitation from occurring - Answer-d.) To prevent cavitation from
occurring
Which basic electrical unit is used to measure a material's opposition to the flow of
electricity?
a.) Ampere
b.) Ohm
c.) Volts
d.) Resistance or impedance - Answer-b.) Ohm
Potable water may be defined as:
a. Any water that occasionally may be polluted from another source
b. Any water that, according to recognized standards, is safe for consumption
c. Water high in organic content
d. Water that has been transported from outside the service area - Answer-b). Any
water that according to recognized standard is safe for human consumption.
To prevent the entry of surface contamination into a well is the purpose of:
a. The well casing
b. The louvers or slots
c. Well development
d. The sanitary seal - Answer-d) The Sanitary Seal
Pure water will exhibit a pH value of?
a. 0.0
b. 7.0
c. 10.5
d. 14.0 - Answer-b) 7.0
A pH reading of 6.0 units indicates that the water sample is:
a. Very acidic
b. Slightly alkaline
c. Very alkaline
d. Slightly acidic - Answer-d) Slightly Acidic
In drinking water quality, "TDS" is the abbreviation for?
a)Total digestable substances
, b) Total dissolved solids
c) Time-delayed sicknesses
d) Terminal diseases started - Answer-b) Total Dissolved Solids
In drinking water regulations, the abbreviation "MCL" stands for?
a) Maximum contaminant level
b) Multiple constituent levels
c) Most common level
d) Minimum considered legal - Answer-a) Maximum contaminant level
The MBAS method is used to determine levels of which of the following drinking water
constituents? - Answer-Forming Agent
In water quality, the symbol "mg/L" is equivalent to:
a. Micrograms per liter
b. Parts per million
c. Parts per billion
d. Mostly good levels - Answer-b) Parts per million
The term "clearwell" refers to a? - Answer-Reservoir at the outlet of a water treatment
plant.
A mechanical device often employed to prevent the over-filling and/ on over-draining of
distribution system reservoir is the? - Answer-Altitude Valve
The primary cause of water quality deterioration in distribution system is? - Answer-
Water age
The top of the pipe is called? - Answer-Soffit
The term "Springline" applies to? - Answer-The midline of a pipeline
When possible, a water main should be tapped while still pressurized to? - Answer-
Minimize contamination risk
A connection made into a water main that is full of under pressure is called a?
a. Cross connection
b. Valve box
c. Wet tap
d. Spinal tap - Answer-c) Wet tap
A special valve that is used almost exclusively to facilitate making connections to
pipeline is the?
