TheoryLow Voltage Tech Study Guide
Study for the Low Voltage Tech with exam topics, practice questions, a free PDF, video walkthrough and timed mock exam links.
How to study for Low Voltage Tech
- Read the topic list so you know what the exam is likely to cover.
- Answer the free practice questions and read every explanation.
- Download the PDF for offline review.
- Use timed mock exams when your untimed practice feels comfortable.
Topics to review
- Core formulas and field calculations
- Codes, standards and compliance
- Safe work practices and PPE
- Tools, materials and on-site reference
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Q1What is the primary purpose of an access control system?
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✓ Correct answer: To restrict entry to authorized individuals while denying access to unauthorized persons
Access control systems are designed to allow only authorized individuals to enter specific areas while keeping out unauthorized persons. This protects assets, personnel, and sensitive information.
Q2Which type of credential stores data on a microchip embedded in the card?
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✓ Correct answer: Smart card
Smart cards contain an embedded microchip that stores and processes data. Unlike magnetic stripe or barcode cards, smart cards can hold more data and support cryptographic operations for enhanced security.
Q3A proximity card reader typically operates at which frequency?
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✓ Correct answer: 125 kHz
Traditional proximity cards operate at 125 kHz (low frequency). This distinguishes them from high-frequency smart cards (13.56 MHz) used in more modern contactless systems.
Q4Which of the following is an example of a biometric credential?
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✓ Correct answer: Fingerprint scan
Biometric credentials are based on unique physical or behavioral characteristics of an individual, such as fingerprints, iris patterns, or facial recognition. PINs, cards, and key fobs are not biometrics.
Q5In access control terminology, what does 'authentication' refer to?
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✓ Correct answer: Verifying that a person is who they claim to be
Authentication is the process of verifying identity—confirming that the person presenting credentials is indeed who they claim to be. Authorization (granting access) is a separate step that follows authentication.
Q6An electric strike holds the door closed when de-energized and releases when energized. This configuration is known as:
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✓ Correct answer: Fail-safe
Fail-safe (also called fail-open) means the lock releases when power is lost, allowing free egress—important for life-safety reasons. Fail-secure means the lock remains locked when power is removed.
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