CSLB C-17 Glazing (Trade Exam) Practice Test
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| Administering body | Contractors State License Board (CSLB), California Department of Consumer Affairs — exam delivered by PSI Services LLC |
|---|---|
| Questions | Not published by CSLB What we read and found nothing in: CSLB — Step 7: Studying for the Examination |
| Time limit | 210 minutes |
| Passing score | Not published by CSLB What we read and found nothing in: CSLB — Step 7: Studying for the Examination |
| Fees |
Source: CSLB — List of All CSLB Fees |
| Languages offered | English |
Frequently asked questions
How many CSLB Trade — Glazing (C-17) practice questions are here?+
A full bank of original CSLB Trade — Glazing (C-17) practice questions across the official content areas, weighted like the real exam, with explanations. Free, no signup.
What is the CSLB Trade — Glazing (C-17) exam like?+
A multiple-choice exam, 210 minutes. Practice by topic here, then take the full timed mock exam to gauge readiness.
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PrepPass practice is in English, 中文 and Español. The official exam is in English — switch the question language to English any time to rehearse the exact terminology you'll see on test day.
Is there a study guide for the CSLB Trade — Glazing (C-17)?+
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 →
Sample practice questions
A few sample questions from this free bank, with full explanations. Use the practice tool above for the whole set.
- 1. Planning and Estimating
Which contract document states the standard each glass product must meet and how it is installed?
- a.The site survey
- b.The floor plans
- c.The specifications
- d.The bid tabulation
Answer: c
Explanation: 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.
Source: CSLB C-17 study guide 13E-17 (evaluating plans and specifications)
- 2. Planning and Estimating
A storefront has five bays. Each bay has a lower lite 40 by 60 inches and a transom lite 40 by 24 inches. How many square feet of glass is in the storefront?
- a.83.3 square feet
- b.33.3 square feet
- c.23.3 square feet
- d.116.7 square feet
Answer: d
Explanation: Each bay is (2,400 + 960) ÷ 144 = 23.3 square feet, and five bays make 116.7. The 83.3 counts only the lower lites, 33.3 only the transoms, and 23.3 only one bay.
Source: CSLB C-17 study guide 13E-17 (job-related calculations)
- 3. Planning and Estimating
A sheet costs $240 and yields 6 lites. What is the glass cost of one lite?
- a.$24
- b.$6
- c.$40
- d.$4
Answer: c
Explanation: 240 ÷ 6 = $40 per lite. The 6 is the number of lites, $4 divides by 60 instead of 6, and 24 shifts the decimal.
Source: CSLB C-17 study guide 13E-17 (job-related calculations)
- 4. Fabrication and Installation of Framing Systems
A skylight lite of 1/4-inch glass is sloped 40 degrees from horizontal. What dead load does the code formula give?
- a.About 3.25 pounds per square foot
- b.About 2.1 pounds per square foot
- c.About 2.5 pounds per square foot
- d.About 1.6 pounds per square foot
Answer: c
Explanation: Steeper than 30 degrees, D = 13 × 0.25 × cos 40° = 3.25 × 0.766 = 2.5. Omitting the cosine gives 3.25, using cos 50° gives 2.1, and 1.6 has no basis.
Source: 2025 CBC §2404.2
- 5. Fabrication and Installation of Framing Systems
What is the correct order of work when setting a storefront frame?
- a.Verify the opening, set and shim, then anchor
- b.Seal the perimeter joint first, then set the frame into the sealant
- c.Glaze the frame first, then brace it in place
- d.Anchor the frame first, then shim it to alignment
Answer: a
Explanation: The specification sequence is to verify the opening, set the frame, then shim and brace before anchoring. Anchoring first locks in any error, sealing the perimeter joint first leaves no room to adjust the frame, and glazing before bracing loads an unstable frame.
Source: UFGS 08 41 13
- 6. Fabrication and Installation of Glazing Materials
What does the glass manufacturer say about face shims?
- a.Face shims replace setting blocks
- b.Face shims must be spaced at 12 inches
- c.Intermittent face shims should not be used
- d.Face shims are required at every corner
Answer: c
Explanation: Face clearance is kept by a continuous cushioning material, not intermittent shims. Spaced shims, shims as blocks and corner shims are not the practice described.
Source: Pilkington ATS-192 General glazing guidelines (2013)
- 7. Fabrication and Installation of Glazing Materials
How many glass balusters must support the top rail of a guard with structural glass balusters?
- a.Only two balusters
- b.Not fewer than ten
- c.Only one baluster
- d.Not fewer than three
Answer: d
Explanation: The top rail is supported by not fewer than three glass balusters, or otherwise supported to stay in place if one fails. One or two are not enough, and ten is not required.
Source: 2025 CBC §2407.1.2
- 8. Glazing Replacement and Retrofit Projects
An annealed lite cracks where the upper half sits in the shade of a canopy and the lower half is in sun. What is the likely cause?
- a.Spontaneous breakage of a tempered lite
- b.Thermal stress from uneven heating of the lite
- c.A failed edge seal in the insulating glass unit
- d.Normal wear that comes with old glass
Answer: b
Explanation: Deep shadows reduce solar heating in part of a lite and are a named cause of thermal stress breakage in annealed glass. Spontaneous breakage involves tempered glass, a failed seal shows as fogging, and wear is not a described cause.
Source: Pilkington ATS-192 General glazing guidelines (2013)
- 9. Glazing Replacement and Retrofit Projects
A window opening control device is installed on an emergency escape window. What must hold after the device is released?
- a.The window must be fixed in place so it cannot open
- b.The device must hold the sash half open at all times
- c.The device must stay locked until it is reset with a key
- d.The net clear opening must still meet the required area
Answer: d
Explanation: After release the device must not reduce the net clear opening area of the unit below the area required for escape. A sash held half open, a device that stays locked until a key resets it, and a sash fixed in place each defeat escape.
Source: 2025 CRC §R321.2.2
- 10. Safety
What is the maximum arresting force on a person wearing a harness in a fall arrest?
- a.3,000 pounds
- b.1,800 pounds
- c.900 pounds
- d.5,000 pounds
Answer: b
Explanation: A system limits maximum arresting force to 1,800 pounds with a body harness. The 5,000 pounds is a strength requirement, 900 pounds applies to belts in restraint and positioning, and 3,000 pounds is a tensile load for short-fall retractables.
Source: Title 8 §1670(b)(11)