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STS practice questions - frequently asked questions

Plain answers about how STS Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real STS exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The STS exam spans 12 domains: Safety; Industry Standards; Low Voltage Wiring and Wireless Communication Technologies; Cabling – Connectorization; Pre-wiring; Electrical Basics; Communications Systems; Residential and Light Commercial Management; Premises Restoration; Tools and Equipment; Customer Orientation and Documentation; Basic Troubleshooting. Every practice question on this site is tagged to one of these domains.

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