LEVEL 1 WATER DISTRIBUTION 2026 EXAMS GUIDE
QUESTIONS AND ANSWERS SURE A+
✔✔The Maximum Pressure at Service Connections Should Be Less Than? - ✔✔100 psi
✔✔In Selecting and Evaluating a Tank, Storage Capacity Must Be Matched with What
Aspect of the System? - ✔✔Peak Demand
✔✔A Hydraulic Grade Line Will Always Slope in What Direction? - ✔✔Slope Downward
in the Direction of the Water Flow
✔✔Where Does the Majority of Microbial Growth within a Water Distribution System
Occur? - ✔✔Dead End Water Lines
✔✔Wells That Are Biologically Contaminated Must Be Bacteriologically Surveyed and
Samples Taken How Far Apart? - ✔✔At Least 12 Hours Apart
✔✔When Backfilling a Pipeline, How Deep Should the First Layer of Backfill Be
Compacted? - ✔✔At the Horizontal Centerline of the Pipe
✔✔What Is an Important Step in Problem Solving? - ✔✔Realization That a Problem Still
Exists
✔✔What Type of Pipe Joint Is Considered Inflexible and Not Usually Installed Below
Ground? - ✔✔Flanged Joint
✔✔When Are Butterfly Valves Used in Distribution Systems? - ✔✔Generally When the
Pipeline Is Greater Than 16'' or When Throttling Might Be Required or When a
Motorized Operator Is Needed for Automated Control
✔✔Fire Hydrants Should Be Placed at What Intervals? - ✔✔350 to 600 Feet Apart, At
All Intersections, In Close Proximity When Used in High-Value Commercial Applications
✔✔AWWA M-17 Fire Hydrants Requirement - ✔✔Two fire hydrants are required for
conducting a fire flow test as per AWWA M-17.
✔✔Unsafe Condition as per OSHA - ✔✔Working in granular soil with a trench width less
than 1:1 is considered an unsafe condition according to OSHA regulations.
✔✔Type of Pump with Fixed Impeller - ✔✔A centrifugal pump consists of an impeller
fixed on a rotating shaft enclosed in a casing.
, ✔✔Purpose of a Check Valve - ✔✔A check valve is used to prevent flow in a reverse
direction.
✔✔Framework to Support Trench Walls - ✔✔Shoring is a complete framework of wood
and/or metal designated to support the walls of a trench.
✔✔Issue with Improperly Adjusted Weighted Check Valve - ✔✔Improperly adjusted
weighted check valve can result in water hammer.
✔✔Protected Classes of Employees - ✔✔Protected classes of employees include
individuals over 40 years of age, gender, and political affiliation.
✔✔Advantage of Gate Valves in Water Distribution Systems - ✔✔Gate valves are used
in water distribution systems due to their lower friction compared to other valves.
✔✔Definition of Controlling - ✔✔Controlling involves ensuring progress towards
objectives and taking corrective actions as necessary.
✔✔Types of Maintenance in Preventative Maintenance Program - ✔✔The four types of
maintenance in a preventative maintenance program are predictive maintenance,
planned maintenance, and corrective maintenance.
✔✔About how many gallons would a 6-inch pipeline, 1000 feet long hold? -
✔✔Approximately 1500 gallons
✔✔Why is the objective of any safety program important? - ✔✔To prevent accidents
and ensure workplace safety
✔✔What is the chlorine residual in treated water with a dose of 2.1 mg/L and a demand
of 0.8 mg/L? - ✔✔Chlorine residual: 1.3 mg/L
✔✔How much chlorine in pounds would be needed to feed one million gallons of water
if the chlorine demand is 2.5 mg/L and a 0.5 mg/L residual is required? -
✔✔Approximately 30 pounds of chlorine
✔✔Estimate the water capacity of a circular tank 40 feet in diameter and 10 feet deep. -
✔✔Approximately 94,000 gallons
✔✔What is the percent accuracy of a water meter that registered 96,000 gallons when
the actual flow was 100,000 gallons? - ✔✔Accuracy: 96%
✔✔If a head of 200 ft is present, what would be the pressure in psi? - ✔✔Pressure: 85
psi
QUESTIONS AND ANSWERS SURE A+
✔✔The Maximum Pressure at Service Connections Should Be Less Than? - ✔✔100 psi
✔✔In Selecting and Evaluating a Tank, Storage Capacity Must Be Matched with What
Aspect of the System? - ✔✔Peak Demand
✔✔A Hydraulic Grade Line Will Always Slope in What Direction? - ✔✔Slope Downward
in the Direction of the Water Flow
✔✔Where Does the Majority of Microbial Growth within a Water Distribution System
Occur? - ✔✔Dead End Water Lines
✔✔Wells That Are Biologically Contaminated Must Be Bacteriologically Surveyed and
Samples Taken How Far Apart? - ✔✔At Least 12 Hours Apart
✔✔When Backfilling a Pipeline, How Deep Should the First Layer of Backfill Be
Compacted? - ✔✔At the Horizontal Centerline of the Pipe
✔✔What Is an Important Step in Problem Solving? - ✔✔Realization That a Problem Still
Exists
✔✔What Type of Pipe Joint Is Considered Inflexible and Not Usually Installed Below
Ground? - ✔✔Flanged Joint
✔✔When Are Butterfly Valves Used in Distribution Systems? - ✔✔Generally When the
Pipeline Is Greater Than 16'' or When Throttling Might Be Required or When a
Motorized Operator Is Needed for Automated Control
✔✔Fire Hydrants Should Be Placed at What Intervals? - ✔✔350 to 600 Feet Apart, At
All Intersections, In Close Proximity When Used in High-Value Commercial Applications
✔✔AWWA M-17 Fire Hydrants Requirement - ✔✔Two fire hydrants are required for
conducting a fire flow test as per AWWA M-17.
✔✔Unsafe Condition as per OSHA - ✔✔Working in granular soil with a trench width less
than 1:1 is considered an unsafe condition according to OSHA regulations.
✔✔Type of Pump with Fixed Impeller - ✔✔A centrifugal pump consists of an impeller
fixed on a rotating shaft enclosed in a casing.
, ✔✔Purpose of a Check Valve - ✔✔A check valve is used to prevent flow in a reverse
direction.
✔✔Framework to Support Trench Walls - ✔✔Shoring is a complete framework of wood
and/or metal designated to support the walls of a trench.
✔✔Issue with Improperly Adjusted Weighted Check Valve - ✔✔Improperly adjusted
weighted check valve can result in water hammer.
✔✔Protected Classes of Employees - ✔✔Protected classes of employees include
individuals over 40 years of age, gender, and political affiliation.
✔✔Advantage of Gate Valves in Water Distribution Systems - ✔✔Gate valves are used
in water distribution systems due to their lower friction compared to other valves.
✔✔Definition of Controlling - ✔✔Controlling involves ensuring progress towards
objectives and taking corrective actions as necessary.
✔✔Types of Maintenance in Preventative Maintenance Program - ✔✔The four types of
maintenance in a preventative maintenance program are predictive maintenance,
planned maintenance, and corrective maintenance.
✔✔About how many gallons would a 6-inch pipeline, 1000 feet long hold? -
✔✔Approximately 1500 gallons
✔✔Why is the objective of any safety program important? - ✔✔To prevent accidents
and ensure workplace safety
✔✔What is the chlorine residual in treated water with a dose of 2.1 mg/L and a demand
of 0.8 mg/L? - ✔✔Chlorine residual: 1.3 mg/L
✔✔How much chlorine in pounds would be needed to feed one million gallons of water
if the chlorine demand is 2.5 mg/L and a 0.5 mg/L residual is required? -
✔✔Approximately 30 pounds of chlorine
✔✔Estimate the water capacity of a circular tank 40 feet in diameter and 10 feet deep. -
✔✔Approximately 94,000 gallons
✔✔What is the percent accuracy of a water meter that registered 96,000 gallons when
the actual flow was 100,000 gallons? - ✔✔Accuracy: 96%
✔✔If a head of 200 ft is present, what would be the pressure in psi? - ✔✔Pressure: 85
psi
