100+ Free C-45 Sign Practice Questions

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2026 Statistics

Key Facts: C-45 Sign Exam

3.5 hrs

Time Limit

CSLB Study Guide

4 Years

Experience Req

CSLB Guidelines

$450

Exam Fee

CSLB Application

26%

Installation

CSLB Study Guide

CEC 600

Key Code

California Electrical Code

The California C-45 Sign examination is a 3.5-hour computer-delivered test administered by PSI. It requires 4 years of journey-level experience and a $450 application fee. The exam covers planning, fabrication, installation, maintenance, and safety.

Sample C-45 Sign Practice Questions

Try these sample questions to test your C-45 Sign exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary factor when estimating labor for installing a neon sign in California?

A.Brand of the transformer

B.Color of the neon tubing

C.Site access and elevation

D.Time of day of installation

Explanation: Site access and elevation drive the equipment and labor hours required to install a neon sign. Difficult access such as rooftops, tight alleys, or multi-story elevations adds rigging, lift time, and crew size. Standard estimating practice bases labor on these physical conditions rather than the sign's appearance.

2When evaluating building plans for a new sign, what must be reviewed to ensure CBC compliance?

A.Wind load requirements

B.Paint color specifications

C.Interior carpet textures

D.Landscaping details

Explanation: Wind load requirements are crucial under the California Building Code for structural integrity. The sign's supports, foundation, and mounting must resist the wind forces for the site. Paint, carpet, and landscaping are not structural code requirements. Reviewing wind load early prevents rejected permits and field failures.

3Which document is essential for securing a sign installation permit in California?

A.Engineered structural drawings

B.Employee break schedule records

C.Marketing brochures

D.Vehicle registration

Explanation: Engineered structural drawings are required to show the sign meets California Building Code requirements. The building department reviews these to confirm wind load, footing, and mounting details. Without stamped drawings the permit application is incomplete. The other documents are unrelated to permit review.

4What is the most critical factor when selecting fasteners for an exterior sign in coastal California?

A.Corrosion resistance

B.Fastener color matching

C.Packaging type

D.Brand name popularity

Explanation: Corrosion resistance is vital in coastal areas to prevent structural failure. Salt air rapidly attacks plain steel and zinc fasteners, causing rust streaks and lost clamp load. Stainless steel is the standard choice near the coast. Aesthetics and brand are secondary to safety and durability.

5In planning, what must a C-45 contractor verify before digging a pylon sign foundation?

A.Underground utility locations

B.Sky conditions

C.Local bird species

D.Adjacent building paint colors

Explanation: Underground utilities must be located via California DigAlert before any excavation. Striking a gas or power line can cause injury, service outages, and costly repairs. The free locate service marks buried lines so the crew can dig safely. The other factors are irrelevant to safe excavation.

6What is the primary consideration when estimating electrical materials for an illuminated sign?

A.Amperage draw

B.Sign cabinet color

C.Font style used

D.Time of year

Explanation: Amperage draw dictates the wire gauge and circuit breaker size required for the sign. The branch circuit must be sized to carry 125% of the continuous load. Color, font, and season are irrelevant to electrical load calculations. Correct wire sizing prevents overheating and nuisance tripping.

7When estimating a job that requires traffic control, what must be included in the cost?

A.Traffic control and flaggers

B.Free coffee for drivers

C.New tires for company trucks

D.Radio advertising fees

Explanation: Traffic control plans and trained flaggers are required costs for work in the public right-of-way. The California MUTCD governs cone spacing, signing, and flagger setup for the work zone. These costs scale with the duration of the lane closure and the number of shifts. The other options are not project-specific traffic control costs.

8What does the California Electrical Code require for the disconnect switch serving an electric sign?

A.Within sight of the sign

B.It must be painted red

C.It must be hidden from view

D.It must be located indoors only

Explanation: The code requires a disconnecting means within sight of the sign so a technician can cut power before servicing. Being able to see the switch while at the sign prevents someone from re-energizing it unexpectedly. Outdoor-rated switches are allowed; indoor-only is not required. The other options violate code or are not mandated.

9Which factor most heavily influences the foundation design of a freestanding monument sign?

A.Soil bearing value

B.Vinyl graphic colors

C.LED module brands

D.Customer logo shape

Explanation: Soil bearing capacity determines the size and depth of the concrete foundation. Weak soil requires a wider footing or deeper excavation to spread the sign's dead and wind loads. A geotechnical report often confirms the bearing value before the engineer finalizes the design. Graphics and LEDs do not affect the concrete base.

10When estimating an overhead sign removal, what equipment cost must be accounted for?

A.Boom truck rental

B.Office printer lease

C.Sales vehicle fuel

D.Lunch for the crew

Explanation: Crane or boom truck rental is a direct equipment cost for overhead work. The estimate should include the rental hours, operator, and travel time to the site. Overhead removals also need rigging and possibly lane closure time. The other costs are general overhead or incidental.

About the C-45 Sign Exam

The C-45 exam tests the applicant's knowledge of sign design, fabrication, installation, testing, maintenance, and safety under California building and electrical codes.

Assessment

Question count not published by the exam provider

Time Limit

3.5 hours

Passing Score

Disclosed at test site

Exam Fee

$450 application fee (California Contractors State License Board (CSLB))

C-45 Sign Exam Content Outline

22%

Planning and Estimating

Evaluating plans, selecting materials, structural and electrical requirements, determining labor, and project estimation.

20%

Sign Design and Fabrication

Reading blueprints, interpreting shop drawings, fabricating structural frames, applying materials, and following UL 48 standards.

26%

Sign Installation

Site preparation, securing foundations, fastening signs to building structures, running power, and connecting electrical components per CEC Article 600.

16%

Testing, Maintenance, and Troubleshooting

Testing illuminated signs, repairing damaged signs, retrofitting LED systems, and troubleshooting electrical faults.

16%

Safety

Cal/OSHA Title 8 regulations, crane and aerial lift safety, traffic control, fall protection, and handling hazardous materials.

How to Pass the C-45 Sign Exam

What You Need to Know

Passing score: Disclosed at test site
Assessment: Question count not published by the exam provider
Time limit: 3.5 hours
Exam fee: $450 application fee

Keys to Passing

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

C-45 Sign Study Tips from Top Performers

1Review CEC Article 600 thoroughly, as electric signs and outline lighting are a major focus.

2Understand the structural requirements in CBC Chapter 16, particularly wind load requirements for large signs.

3Familiarize yourself with Cal/OSHA Title 8, focusing on cranes, rigging, and aerial lifts.

4Practice reading sign blueprints and calculating labor and materials accurately.

5Study troubleshooting techniques for common lighting components like ballasts, transformers, and LEDs.

Frequently Asked Questions

How long is the C-45 exam?

You have 3.5 hours to complete the computer-delivered multiple-choice exam at a PSI testing center.

What is the application fee?

The total initial application fee to the CSLB is $450.

Are calculators allowed?

Yes, an on-screen calculator is provided during the computer-based test, but personal calculators are generally not allowed.

What codes should I study?

Focus on the California Electrical Code (CEC) Article 600, California Building Code (CBC) Chapter 16 (structural), Cal/OSHA Title 8 Safety Orders, and UL 48 standards for electric signs.

100+ Free C-45 Sign Practice Questions

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