Water DISTRIBUTION | Questions with 100% Verified Answers |
Latest Update 2026/2027
Question: If you come upon a co-worker who is not breathing, you should immediately
Answer: Start artificial respiration
Question: A connection from the municipal water supply directly to the packing gland of a centrifugal
wastewater pump
Answer: is a hazard to the safety of the potable water supply
Question: A waterborne disease that can be transferred to humans if proper disinfection is not provided is
Answer: Typhoid
Question: Rising stem valves are most often used
Answer: in a pumping station
Question: The device used to check water flow to consumers is a
Answer: Water meter
Question: Which one of the following types of meters has NO MOVING parts
Answer: Venturi
Question: Distribution system pressure should not be allowed to drop below ___ PSI
Answer: 20
Question: To determine whether an intersecting sewer line crosses over or under a water main, one would look
at the
Answer: Elevation view
Question: The chlorine residual in water may be determined using the reagent
Answer: Diethyl-p-phenylendiamine (DPD)
Question: Customer services are most commonly metered with ___ meters
Answer: Positive displacement
Question: A toxic substance is always
Answer: poisonous
Question: The primary reason for a dry barrel fire hydrant is to
Answer: keep the hydrant from freezing
Question: The rotating element in a centrifugal pump is commonly called
Answer: an impeller
Question: First aid for 1st degree burn
Answer: submerge the burned area in cold water
, Question: what info has to be on a lock out tag in use?
Answer: signature of the person who locked it out
Question: killing of pathogenic organisms is called
Answer: disinfection
Question: Temporary cloudiness in freshly drawn samples of tap water may be caused by
Answer: air
Question: Vent openings on reservoirs and storage tanks should be
Answer: screened
Question: Fire fighting may cause low pressure in an area of a distribution system. The low pressure might lead
to
Answer: contamination of the system by back-siphonage
Question: Hydrogen Sulfide (H2S) smells like
Answer: rotten eggs
Question: When driving a company vehicle
Answer: follow the same traffic laws as everyone else
Question: When using chlorine tablets to disinfect pipelines, its best to place the tablets
Answer: on the inside top
Question: a connection between a safe and an unsafe water supply is called a
Answer: cross connection
Question: velocity of flow in mains is usually expressed in terms of
Answer: feet per second (FPS)
Question: When opening and closing valves in high pressure lines, the valves should be opened and closed ___
Answer: Slowely
Question: Pressure is usually measured in
Answer: pounds per square inch (PSI)
Question: a water main should be disinfected
Answer: After the pipe is laid in place.
Question: A new section of water main has just been laid. Before it is completely back-filled and put into
service, several thing must be done. What is the correct order for doing them?
Answer: pressure test, flush, disinfect, flush, collect bacti samples
Question: samples taken for routine analysis should be preserved by ___
Answer: refrigerating
Latest Update 2026/2027
Question: If you come upon a co-worker who is not breathing, you should immediately
Answer: Start artificial respiration
Question: A connection from the municipal water supply directly to the packing gland of a centrifugal
wastewater pump
Answer: is a hazard to the safety of the potable water supply
Question: A waterborne disease that can be transferred to humans if proper disinfection is not provided is
Answer: Typhoid
Question: Rising stem valves are most often used
Answer: in a pumping station
Question: The device used to check water flow to consumers is a
Answer: Water meter
Question: Which one of the following types of meters has NO MOVING parts
Answer: Venturi
Question: Distribution system pressure should not be allowed to drop below ___ PSI
Answer: 20
Question: To determine whether an intersecting sewer line crosses over or under a water main, one would look
at the
Answer: Elevation view
Question: The chlorine residual in water may be determined using the reagent
Answer: Diethyl-p-phenylendiamine (DPD)
Question: Customer services are most commonly metered with ___ meters
Answer: Positive displacement
Question: A toxic substance is always
Answer: poisonous
Question: The primary reason for a dry barrel fire hydrant is to
Answer: keep the hydrant from freezing
Question: The rotating element in a centrifugal pump is commonly called
Answer: an impeller
Question: First aid for 1st degree burn
Answer: submerge the burned area in cold water
, Question: what info has to be on a lock out tag in use?
Answer: signature of the person who locked it out
Question: killing of pathogenic organisms is called
Answer: disinfection
Question: Temporary cloudiness in freshly drawn samples of tap water may be caused by
Answer: air
Question: Vent openings on reservoirs and storage tanks should be
Answer: screened
Question: Fire fighting may cause low pressure in an area of a distribution system. The low pressure might lead
to
Answer: contamination of the system by back-siphonage
Question: Hydrogen Sulfide (H2S) smells like
Answer: rotten eggs
Question: When driving a company vehicle
Answer: follow the same traffic laws as everyone else
Question: When using chlorine tablets to disinfect pipelines, its best to place the tablets
Answer: on the inside top
Question: a connection between a safe and an unsafe water supply is called a
Answer: cross connection
Question: velocity of flow in mains is usually expressed in terms of
Answer: feet per second (FPS)
Question: When opening and closing valves in high pressure lines, the valves should be opened and closed ___
Answer: Slowely
Question: Pressure is usually measured in
Answer: pounds per square inch (PSI)
Question: a water main should be disinfected
Answer: After the pipe is laid in place.
Question: A new section of water main has just been laid. Before it is completely back-filled and put into
service, several thing must be done. What is the correct order for doing them?
Answer: pressure test, flush, disinfect, flush, collect bacti samples
Question: samples taken for routine analysis should be preserved by ___
Answer: refrigerating
