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VideoFree Well Driller Practice Test by State 2026: 2,500+ QuestionsThis examArticleFree Well Driller Practice Test by State 2026: 2,500+ Questions21 min read
Exam Review

Key Facts: CA Well Driller Exam

70%

Passing Score

State DNR

100 Q

Practice Questions

OpenExamPrep

2 hrs

Exam Time

State DNR

8 hrs

CE Per Cycle

State DNR

$590

License Fee

LicenseMap 2026

California requires well drillers and pump installers to pass a state licensing exam covering well construction standards, groundwater protection, and DWR regulations.

Sample CA Well Driller Practice Questions

Try these sample questions to review concepts for the CA Well Driller exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What California contractor license classification is required for water well drilling?
A.C-57 (Well Drilling Contractor)
B.C-61/D-21 (Machinery and Pumps)
C.B (General Building)
D.A (General Engineering)
Explanation: The C-57 Well Drilling Contractor classification is required for all water well drilling work in California. A C-57 contractor installs and repairs water wells and pumps by boring, drilling, excavating, casing, cementing, and cleaning to provide a supply of uncontaminated water.
2Which California agency issues the C-57 Well Drilling Contractor license?
A.Contractors State License Board (CSLB)
B.Department of Water Resources (DWR)
C.State Water Resources Control Board
D.Department of Public Health
Explanation: The Contractors State License Board (CSLB) issues the C-57 Well Drilling Contractor license. CSLB administers the examination, processes applications, and handles licensing, renewals, and complaint resolution for all contractor classifications including C-57.
3What license classification is required for pump installation work in California?
A.C-61/D-21 (Machinery and Pumps)
B.C-57 (Well Drilling)
C.C-10 (Electrical)
D.C-36 (Plumbing)
Explanation: The C-61/D-21 (Machinery and Pumps) classification covers pump installation, maintenance, and repair in California. A C-57 license also authorizes pump work as part of well drilling operations, but standalone pump installation requires the C-61/D-21 classification.
4How many years of journey-level experience are required to obtain a California C-57 license?
A.4 years within the last 10 years
B.2 years
C.6 years
D.1 year
Explanation: California requires at least four full years of experience at a journey level, or as a foreman, supervisor, or contractor in the C-57 classification within the ten years immediately before filing the application. The experience must be verifiable and certified by individuals with direct knowledge.
5What two exams must a C-57 Well Drilling applicant pass in California?
A.Law & Business exam and C-57 Trade exam
B.Only a trade exam
C.Only a law exam
D.A written exam and a field test
Explanation: California C-57 applicants must pass two separate exams: the Law & Business exam (covering contractor law, project management, and business operations) and the C-57 Trade exam (covering well drilling knowledge and skills). Both are multiple-choice, closed-book exams.
6What is the CSLB application fee for a C-57 contractor license?
A.$450 (non-refundable)
B.$200
C.$100
D.$1,000
Explanation: The CSLB application fee for a C-57 Well Drilling Contractor license is $450, which is non-refundable. The initial license fee is an additional $200 for sole owners or $350 for corporations/partnerships. The total for a sole owner is $650 to obtain the license.
7How often must a California C-57 license be renewed?
A.Every 2 years
B.Annually
C.Every 3 years
D.Every 5 years
Explanation: California contractor licenses, including the C-57, must be renewed every two years. The renewal fee is $450 for sole owners and $700 for corporations/partnerships. Active licensees must maintain their contractor bond and insurance throughout the license period.
8What bond amount is required for a California contractor (C-57) license?
A.$25,000
B.$10,000
C.$50,000
D.$5,000
Explanation: All California licensed contractors, including C-57 Well Drilling Contractors, must maintain a $25,000 contractor bond. This bond protects consumers from damages resulting from violations of the contractor licensing law.
9What is the minimum project cost threshold requiring a California contractor license as of January 1, 2025?
A.$1,000 (labor and materials combined)
B.$500
C.$5,000
D.$10,000
Explanation: As of January 1, 2025 (AB 2622), a California contractor license is required for any project valued at $1,000 or more (combined labor and materials). This threshold was increased from the previous $500 limit. This applies to all contractor classifications including C-57.
10What publication establishes California's statewide well construction standards?
A.DWR Bulletin 74 (Water Well Standards and California Well Standards)
B.CSLB Code of Regulations
C.EPA Safe Drinking Water Act
D.OSHA Construction Standards
Explanation: DWR Bulletin 74 (comprising Bulletin 74-81 Water Well Standards and Bulletin 74-90 California Well Standards) establishes the minimum standards for water well construction, maintenance, and destruction in California. It is referenced in the C-57 exam and governs all well work statewide.

About the CA Well Driller Exam

The California well driller exam covers state well construction standards, casing and grouting requirements, pump installation, groundwater protection, DWR licensing regulations, well abandonment procedures, and professional practice under California well standards.

Exam sponsor: California Department of Water Resources. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

100 questions

Time Limit

2 hours

Passing Score

70%

Exam / Certification Fees

$590

Exam sponsor website

Reported exam pass rate: 70%. estimated first-time pass rate This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

25%

Well Construction

Casing, grouting, well design, drilling methods, well development

20%

Pump Installation

Pump types, sizing, electrical connections, pressure systems, maintenance

20%

Regulations

DWR licensing, well standards, reporting requirements, fees, CE requirements

20%

Groundwater

Aquifer protection, water quality, contamination prevention, California geology

15%

Professional Practice

Well logs, abandonment procedures, safety, contracts, client relations

Preparing for the CA Well Driller Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 100 questions
  • Time limit: 2 hours
  • Exam / certification fees: $590 Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CA Well Driller: Suggested Study Strategy

1Master California's well construction standards and casing requirements under DWR rules
2Understand proper grouting procedures and materials for California soil conditions
3Study pump types, sizing calculations, and electrical connection requirements
4Know groundwater protection measures and California's SGMA requirements
5Review well log documentation requirements and abandonment procedures

Frequently Asked Questions

What does the California well driller exam cover?

The exam covers well construction standards, casing and grouting requirements, pump installation, groundwater protection, California DWR regulations, and professional practice.

What is the passing score for the CA well driller exam?

A minimum score of 70% is required to pass the California well driller licensing examination.

What experience is required for a California well driller license?

California requires experience working under a licensed driller before you can sit for the licensing exam. Contact the DWR for current requirements.

How often must the California well driller license be renewed?

License renewal requirements include completing continuing education hours. Contact the California DWR for the current renewal cycle and CE requirements.