Associated Locksmiths of America (ALOA) Practice Test 2025 – Your Comprehensive All-in-One Guide to Exam Excellence!

Question: 1 / 400

Which of the following key types features a cylindrical shape?

Flat key

Tubular key

The correct answer is tubular key, as this type of key is designed with a cylindrical shape that allows it to fit into a matching tubular lock. Tubular keys have a round cross-section and generally feature a series of small notches cut into the outer circumference, which interact with corresponding pins in the lock.

This design offers a unique mechanism that enhances the security and resistance against picking compared to traditional flat keys.

In contrast, flat keys are typically characterized by their flat, rectangular form with grooves along one edge, and dimple keys feature a flat shape with indentations or 'dimples' that interact with specialized locks. Barrel keys, while sometimes used in a cylindrical context, do not maintain the same standardized cylindrical shape as tubular keys and are generally associated with a different locking mechanism and design approach.

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Dimple key

Barrel key

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