C-17 is CSLB's Glazing Contractor classification (16 CCR §832.17). Cuts, assembles and installs glass, mirror and glass-substitute products and the frames, panels, sashes and doors that hold them. Applicants take the Glazing (C-17) Examination as well as the Law and Business exam. CSLB's Data Portal lists 3,041 active licenses in this class (read November 7, 2026). CSLB Glazing (C-17) Trade Examination — Questions: Not published by CSLB · 210 minutes · Passing score: Not published by CSLB. PrepPass also publishes a complete study guide for this exam as a downloadable book (260 pages, 411 practice questions inside, $24.99).
Your other CSLB exam
This license also needs the Law and Business exam (CSLB can waive an exam in some cases). 110 lessons, 732 practice questions.
Exam inside two weeks?
A printable colour cheat sheet for the exam: the format, the content areas and the figures it turns on, each checked against a named source and dated.
CSLB C-17 Glazing cheat sheet PDF — $9.99 →
6 pages · US Letter · printable PDF · yours to keep
The C-17 license, from CSLB's own pages
Glazing Contractor (16 CCR §832.17). Cuts, assembles and installs glass, mirror and glass-substitute products and the frames, panels, sashes and doors that hold them.
CSLB's official C-17 study guide (PDF)CSLB's C-17 classification page
Free C-17 practice questionsFree C-17 study guideC-17 study guide book, $24.99CSLB C-17 Glazing cheat sheet PDFBundle: $30.99 for 4 itemsAll California license classes
Facts as of November 7, 2026; check CSLB for current rules. PrepPass is independent of CSLB.
Test what you know · free, all of it
The same 260 questions, dealt five ways. Pick the one that fits the time you have.
Learn what the questions test
Practice finds the gaps. Reading closes them. The five chapters below are free to read online. The study guide book is a separate download, sold on its own page.
Before you sit
See the questions first
Real items, with the answer marked and the reason written out — the same format as all 260.
Which contract document states the standard each glass product must meet and how it is installed?
Why: The specifications carry the written requirements for products, standards and installation. Floor plans show locations, a site survey records the lot, and a bid tabulation compares prices.CSLB C-17 study guide 13E-17 (evaluating plans and specifications)
Top, middle and bottom width readings of an opening are 35-7/8, 36 and 36-1/8 inches. Which width is used to size the frame?
Why: The smallest reading controls because the frame must fit the tightest point. The 36 inches is the middle reading and would bind at the narrow top, 36-1/8 is the widest reading and binds worse, and 36-1/16 is a figure between them that still exceeds the narrowest reading by 3/16 inch.UFGS 08 41 13 (verify openings); CSLB C-17 study guide 13E-17
The exam itself
| Questions | Not published by CSLBCSLB says only that “All trade examinations consist of multiple-choice questions.” No count appears in the study guide, the Examinations FAQ, or PSI's candidate bulletin. |
|---|---|
| Time | 210 minutesCSLB: “You will be given 3-1/2 hours to complete each examination.” It is per examination, not per sitting — a candidate taking Law and Business plus a trade exam gets 3-1/2 hours for each. |
| Sections | Planning and Estimating · Fabrication and Installation of Framing Systems · Fabrication and Installation of Glazing Materials · Glazing Replacement and Retrofit Projects · Safety |
| Passing score | Not published by CSLBCSLB: “You will be informed at the test site about the percentage of correct answers needed to pass each examination,” and, in Get Licensed to Build Q14, that the percentage “varies for each exam”. Passing candidates are never shown their own score. PrepPass states no passing score for this exam. |
| Our bank | 260 questions · updated November 2026Written from California Contractors State License Board (CSLB) |
| Languages | English |
| Source | California Contractors State License Board (CSLB)Verified 2026-11-08 |
Contractor License Exams
Questions
C-17 is CSLB's Glazing Contractor classification (16 CCR §832.17). Cuts, assembles and installs glass, mirror and glass-substitute products and the frames, panels, sashes and doors that hold them.
Yes. CSLB requires the Glazing (C-17) Examination in addition to the Law and Business exam.
As CSLB states it: At least 4 years journey-level/foreman/supervisor/contractor/owner-builder experience in the class within the last 10 years; up to 3 years credit for education/apprenticeship, at least 1 year must be practical. Source: 16 CCR §825 (2026 CSLB Law Book); CSLB Step 3 Qualifying Experience page.
CSLB publishes the C-17 study guide (form 13E-17 (03-2026)) as a free PDF at https://www.cslb.ca.gov/Resources/StudyGuides/C17StudyGuide.pdf. It lists the exam's content areas and their percentages.
All 260 questions, the timed mock and the report are free with no sign-up. A free account only adds saving your progress. The study guide book is sold separately, $24.99 one-time; nothing in the practice requires it.
No. Ours is 100 questions in 210 minutes; the real exam is 210 minutes long. Use the mock for stamina and section timing, not as a score predictor.
Not published by CSLB. CSLB: “You will be informed at the test site about the percentage of correct answers needed to pass each examination,” and, in Get Licensed to Build Q14, that the percentage “varies for each exam”. Passing candidates are never shown their own score. PrepPass states no passing score for this exam.
Yes. PrepPass sells CSLB C-17 Glazing Contractor Study Guide 2026, a PDF + EPUB download, $24.99 one-time; the practice on this page stays free without it. See the study guide →