LEVEL 1 WATER DISTRIBUTION ACTUAL
EXAM TEST 2026 QUESTIONS AND
SOLUTIONS 100% VERIFIED
⩥ What is the maximum allowable concentration of nitrate when tested
yearly for a groundwater treatment plant? Answer: 10 mg/L
⩥ How is the minimum number of total coliform samples collected per
month determined? Answer: Based on the population served by the
system
⩥ What is the procedure when a distribution bacteriological sample is
positive for total coliform? Answer: Repeat the sample and take samples
5 connections upstream and downstream to confirm total coliform
⩥ How long must water be in the pipeline for lead and copper sampling?
Answer: 6 hours
⩥ Define hydraulic grade line. Answer: A line to which the water level
would rise in a small, vertical tube connected to the pipe
⩥ How often should cathodic protection anodes in your system be
inspected? Answer: Every year
, ⩥ What is the maximum velocity at which water pipelines are generally
designed to carry water? Answer: Below 2.5 FPS (feet per second)
⩥ How is energy use in water systems best defined? Answer: Energy use
varies among systems, and an energy inventory study would need to be
conducted to determine relationships
⩥ What is the minimum recommended separation distance between a
water main and a storm sewer? Answer: 6 feet
⩥ Key Elements of an Organization Plan Answer: Identifies clear lines,
defines the divisions of labor, establishes unity of command
⩥ Use of Concrete Thrust Blocks Answer: To restrain pipelines at every
bend and transition
⩥ Definition of Plan and Profile Drawings Answer: Engineering
drawings showing pipe depth, location, and distance from a reference
point
⩥ Components of Directing Staff Answer: Motivating and
communicating effectively
⩥ Accuracy Range for Large Meters Answer: 97% to 103% for optimal
performance
EXAM TEST 2026 QUESTIONS AND
SOLUTIONS 100% VERIFIED
⩥ What is the maximum allowable concentration of nitrate when tested
yearly for a groundwater treatment plant? Answer: 10 mg/L
⩥ How is the minimum number of total coliform samples collected per
month determined? Answer: Based on the population served by the
system
⩥ What is the procedure when a distribution bacteriological sample is
positive for total coliform? Answer: Repeat the sample and take samples
5 connections upstream and downstream to confirm total coliform
⩥ How long must water be in the pipeline for lead and copper sampling?
Answer: 6 hours
⩥ Define hydraulic grade line. Answer: A line to which the water level
would rise in a small, vertical tube connected to the pipe
⩥ How often should cathodic protection anodes in your system be
inspected? Answer: Every year
, ⩥ What is the maximum velocity at which water pipelines are generally
designed to carry water? Answer: Below 2.5 FPS (feet per second)
⩥ How is energy use in water systems best defined? Answer: Energy use
varies among systems, and an energy inventory study would need to be
conducted to determine relationships
⩥ What is the minimum recommended separation distance between a
water main and a storm sewer? Answer: 6 feet
⩥ Key Elements of an Organization Plan Answer: Identifies clear lines,
defines the divisions of labor, establishes unity of command
⩥ Use of Concrete Thrust Blocks Answer: To restrain pipelines at every
bend and transition
⩥ Definition of Plan and Profile Drawings Answer: Engineering
drawings showing pipe depth, location, and distance from a reference
point
⩥ Components of Directing Staff Answer: Motivating and
communicating effectively
⩥ Accuracy Range for Large Meters Answer: 97% to 103% for optimal
performance
