Free Minnesota Well Contractor Written Examination Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Minnesota Well Contractor Written Examination practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A Minnesota company plans to construct water-supply wells and also install their pumps. Which credential authorizes the full scope rather than only a limited pump-related scope?

   1. A. Well contractor license
   2. B. Limited well sealing contractor license
   3. C. Monitoring well contractor registration
   4. D. Elevator boring contractor license

   Answer: A

   Explanation: Minnesota Rules 4725.0475 states, 'A person must be licensed as a well contractor to' construct, repair, modify, or seal a well or boring and to install or remove pumps and pumping equipment. The full well contractor credential therefore fits both activities.

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.0475, subpart 3

2. 2Before constructing a well on land owned by someone else, what must exist under Minnesota's permit-and-notification rules?

   1. A. A verbal promise witnessed by the drilling crew
   2. B. A written agreement meeting the statutory requirement
   3. C. A transfer of the contractor's license to the landowner
   4. D. A monitoring-well maintenance permit

   Answer: B

   Explanation: Rule 4725.1810 provides, 'A person must not construct, or have constructed, a well on another person's property unless a written agreement exists.'

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.1810, subpart 1

3. 3A proposed borehole would hydraulically connect an unconsolidated aquifer with a bedrock aquifer. What does Minnesota require?

   1. A. Do not construct the interconnection
   2. B. Install two screens across the contact
   3. C. Use only potable drilling water
   4. D. File a construction record after connecting them

   Answer: A

   Explanation: Rule 4725.2020 says, 'A well or boring must not be constructed to interconnect aquifers separated by a confining layer or interconnect an unconsolidated aquifer and a bedrock aquifer.'

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.2020, subpart 1

4. 4A contractor wants to reuse permanent casing removed from the same type of well. Within what period after its prior installation may compliant salvaged casing be reused?

   1. A. 30 days
   2. B. 120 days
   3. C. 365 days
   4. D. 1,825 days

   Answer: B

   Explanation: Rule 4725.2250 allows casing 'salvaged from the same type of well or boring within 120 days of installation' if it meets new-casing specifications.

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.2250, subpart 3

5. 5A water-service pipe connects to a well casing 14 inches above established grade. What protection is required at the connection?

   1. A. Weatherproof and insect-proof
   2. B. Watertight and vermin-proof
   3. C. Pressure-rated and self-aligning
   4. D. Screened with noncorrosive mesh and pointed downward

   Answer: A

   Explanation: Rule 4725.3150 requires a connection 12 inches or more above grade to be 'constructed to be weatherproof and insect proof.'

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.3150, subpart 1

6. 6In what material may a dug water-supply well be constructed?

   1. A. Only unconsolidated material
   2. B. Only crystalline bedrock
   3. C. Only carbonate bedrock
   4. D. Any formation if excavated by hand

   Answer: A

   Explanation: Rule 4725.5750 states, 'A dug water-supply well may only be constructed in an unconsolidated formation.'

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.5750, subpart 1

7. 7Who must pass the Minnesota examination when applying to serve as a certified representative of a well contractor?

   1. A. Only the company owner
   2. B. The individual applying to be the certified representative
   3. C. Every drilling rig operator
   4. D. Only the bond surety's agent

   Answer: B

   Explanation: Rule 4725.1025 says, 'Anyone applying to be a certified representative of a licensee or registrant or as an individual well contractor must pass an examination.' The obligation attaches to the individual applicant.

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.1025

8. 8A noncommunity well lies within a political subdivision operating a delegated well program. Where is the construction notification ordinarily filed?

   1. A. With the Department of Labor
   2. B. With the county recorder
   3. C. With the delegated well program
   4. D. With the equipment manufacturer

   Answer: C

   Explanation: Rule 4725.1810 requires a person working within a delegated program to 'file a notification with, or obtain a permit from, the delegated program' before regulated work.

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.1810, subpart 2

9. 9Apart from the Decorah and Glenwood formations, what is the maximum absolute length that an open borehole, gravel pack, or screen may extend through a confining layer?

   1. A. No more than two feet
   2. B. No more than ten feet
   3. C. No more than fifteen feet
   4. D. No more than twenty feet

   Answer: B

   Explanation: Rule 4725.2020 limits such an extension to 'ten feet of a confining layer, except for the Decorah or Glenwood formations,' also subject to the percentage limit.

   Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.2020, subpart 1a, item A

10. 10For a permanent casing in a well deeper than 50 feet, what is the minimum inside diameter?

    1. A. A 1.25-inch inside diameter
    2. B. A 1.50-inch inside diameter
    3. C. A 2.00-inch inside diameter
    4. D. A 2.50-inch inside diameter

    Answer: C

    Explanation: Rule 4725.2250 says, 'The inside diameter of a permanent casing must not be less than two inches for a well or boring greater than 50 feet in depth.'

    Reference: Minnesota Rules 2025, Chapter 4725 — Minnesota Rules 4725.2250, subpart 10