Minnesota Class D Water Exam Premium
General Exam Study Guide – Complete
Questions with Correct Detailed Answers
⭐ Brand New Version | Exam-Focused | Designed for High
Scores
Take your exam preparation to the next level with this Premium General Exam Study Guide.
This powerful resource is designed to help students review faster, understand key concepts
clearly, and perform confidently in exams.
Inside this guide, you will find complete exam questions paired with correct, detailed
answers that explain the reasoning behind each response. The structured format allows you to
focus on important and frequently tested topics, helping you study efficiently and effectively.
🔥 Key Highlights
✔ Complete Exam Questions covering major concepts
✔ Correct Answers with Detailed Explanations for deeper understanding
✔ Exam-Focused Content based on commonly tested material
✔ Well-Organized Format for quick and effective revision
✔ Latest Updated Version for reliable exam preparation
✔ Ideal for Fast Review and Last-Minute Study
🚀 Why Students Prefer This Guide
This study guide helps students simplify complex topics, identify key concepts quickly, and
strengthen exam confidence. By practicing with structured questions and reviewing detailed
answers, you can improve retention and boost your chances of achieving higher scores.
🎯 Perfect For
,• Final exam preparation
• Midterm exam revision
• Weekly study sessions
• Practicing exam-style questions
• Strengthening knowledge before tests
📘 A reliable and effective study companion for students who want structured practice,
clear explanations, and stronger exam performance.
According to the Safe Drinking Water Act the basic definition of a public water supply
system is any water system that supplies water for human consumption that serves: -
ANSWER✅✅✅15 service connection or over 25 persons for over 60 days a year
What federal law regulates public water supplies? -ANSWER✅✅✅Safe Drinking Water
Act
What cause water to move through pores in soil and rocks ? -ANSWER✅✅✅Gravity
What are disease producing bacteria called? -ANSWER✅✅✅Pathogenic
A presence/absence coliform test utilizes -ANSWER✅✅✅color change
What are two main causes of harness in water? -ANSWER✅✅✅Calcium and
magnesium
Which source of water has the greatest natural protection from bacterial contamination?
-ANSWER✅✅✅deep well in gravel
Which of the following terms refers to excessive internal pressure which may be several
times the normal operating pressure and can seriously damage hydropnematic tanks,
valves, and piping network. -ANSWER✅✅✅water hammer
What are the two most important safety concerns when entering a confined space? -
ANSWER✅✅✅hazardous gases and oxygen deficiency
what piece of safety equipement must an operator wear when entering a confined
space? -ANSWER✅✅✅Harness
Which document provides a profile of hazardous substances? -ANSWER✅✅✅MSDS
, What safety measure must ab operator follow prior to working on electrical equipment? -
ANSWER✅✅✅Lock out Tag out all electrical switches
what is the correct procedure for mixing acid an water -ANSWER✅✅✅Acid is ADDED
SLOWLY to water
The major source of error when obtaining water quality information is improper -
ANSWER✅✅✅Sampling
Polyphosphates should be fed at which point? -ANSWER✅✅✅Before the addition of
chlorine
After a new water main is installed and pressure is tested, it should be? -
ANSWER✅✅✅Filled with a solution of 25 ppm to 50 ppm free chlorine for at least 24
hours before flushing
The minimum horizontal distance allowed between waterman and sanitary sewer is -
ANSWER✅✅✅10 feet
The health department requires a minimum of how much free chlorine residual at distant
points of the ditribution system? -ANSWER✅✅✅0.2 ppm
A PH reading of 2 means the water is: -ANSWER✅✅✅Acidic
vent openings on reservoirs and clear wells should be: -ANSWER✅✅✅Screened
How many pipe diameters should a meter be located in relationship to elbows or
fittings? -ANSWER✅✅✅Three pipe diameters upstream, five pipe diameters
downstream
chlorine leaks can be detected around a chlorine cylinder by the use of: -
ANSWER✅✅✅Ammonia
The intake of a forced ventilation system for a chlorinator room should be located: -
ANSWER✅✅✅Near the floors
If an operator hears a pinging sound coming from a pump what is the probable cause? -
ANSWER✅✅✅Cavitation
A main break may cause low pressure in the distribution system which in turn may
result in: -ANSWER✅✅✅Contamination of the system by backsiphonage
General Exam Study Guide – Complete
Questions with Correct Detailed Answers
⭐ Brand New Version | Exam-Focused | Designed for High
Scores
Take your exam preparation to the next level with this Premium General Exam Study Guide.
This powerful resource is designed to help students review faster, understand key concepts
clearly, and perform confidently in exams.
Inside this guide, you will find complete exam questions paired with correct, detailed
answers that explain the reasoning behind each response. The structured format allows you to
focus on important and frequently tested topics, helping you study efficiently and effectively.
🔥 Key Highlights
✔ Complete Exam Questions covering major concepts
✔ Correct Answers with Detailed Explanations for deeper understanding
✔ Exam-Focused Content based on commonly tested material
✔ Well-Organized Format for quick and effective revision
✔ Latest Updated Version for reliable exam preparation
✔ Ideal for Fast Review and Last-Minute Study
🚀 Why Students Prefer This Guide
This study guide helps students simplify complex topics, identify key concepts quickly, and
strengthen exam confidence. By practicing with structured questions and reviewing detailed
answers, you can improve retention and boost your chances of achieving higher scores.
🎯 Perfect For
,• Final exam preparation
• Midterm exam revision
• Weekly study sessions
• Practicing exam-style questions
• Strengthening knowledge before tests
📘 A reliable and effective study companion for students who want structured practice,
clear explanations, and stronger exam performance.
According to the Safe Drinking Water Act the basic definition of a public water supply
system is any water system that supplies water for human consumption that serves: -
ANSWER✅✅✅15 service connection or over 25 persons for over 60 days a year
What federal law regulates public water supplies? -ANSWER✅✅✅Safe Drinking Water
Act
What cause water to move through pores in soil and rocks ? -ANSWER✅✅✅Gravity
What are disease producing bacteria called? -ANSWER✅✅✅Pathogenic
A presence/absence coliform test utilizes -ANSWER✅✅✅color change
What are two main causes of harness in water? -ANSWER✅✅✅Calcium and
magnesium
Which source of water has the greatest natural protection from bacterial contamination?
-ANSWER✅✅✅deep well in gravel
Which of the following terms refers to excessive internal pressure which may be several
times the normal operating pressure and can seriously damage hydropnematic tanks,
valves, and piping network. -ANSWER✅✅✅water hammer
What are the two most important safety concerns when entering a confined space? -
ANSWER✅✅✅hazardous gases and oxygen deficiency
what piece of safety equipement must an operator wear when entering a confined
space? -ANSWER✅✅✅Harness
Which document provides a profile of hazardous substances? -ANSWER✅✅✅MSDS
, What safety measure must ab operator follow prior to working on electrical equipment? -
ANSWER✅✅✅Lock out Tag out all electrical switches
what is the correct procedure for mixing acid an water -ANSWER✅✅✅Acid is ADDED
SLOWLY to water
The major source of error when obtaining water quality information is improper -
ANSWER✅✅✅Sampling
Polyphosphates should be fed at which point? -ANSWER✅✅✅Before the addition of
chlorine
After a new water main is installed and pressure is tested, it should be? -
ANSWER✅✅✅Filled with a solution of 25 ppm to 50 ppm free chlorine for at least 24
hours before flushing
The minimum horizontal distance allowed between waterman and sanitary sewer is -
ANSWER✅✅✅10 feet
The health department requires a minimum of how much free chlorine residual at distant
points of the ditribution system? -ANSWER✅✅✅0.2 ppm
A PH reading of 2 means the water is: -ANSWER✅✅✅Acidic
vent openings on reservoirs and clear wells should be: -ANSWER✅✅✅Screened
How many pipe diameters should a meter be located in relationship to elbows or
fittings? -ANSWER✅✅✅Three pipe diameters upstream, five pipe diameters
downstream
chlorine leaks can be detected around a chlorine cylinder by the use of: -
ANSWER✅✅✅Ammonia
The intake of a forced ventilation system for a chlorinator room should be located: -
ANSWER✅✅✅Near the floors
If an operator hears a pinging sound coming from a pump what is the probable cause? -
ANSWER✅✅✅Cavitation
A main break may cause low pressure in the distribution system which in turn may
result in: -ANSWER✅✅✅Contamination of the system by backsiphonage
