Oklahoma Locksmith Practice Exam

What type of lock typically requires a key to unlock?

1. Knob lock

2. Deadbolt lock

3. Plunger-type lock

4. All of the above

The correct answer is: All of the above

All of the options listed require a key to unlock, which means the answer indicates that each type of lock typically needs a key for operation. Knob locks are commonly found on residential doors and often have a keyhole as part of their design for added security, allowing authorized users to unlock the door with a physical key. Deadbolt locks, known for their strength, also necessitate a key or a thumb turn on the inside to control the locking mechanism from the outside, reinforcing security. Plunger-type locks, often seen in older cars or some cabinet designs, may also include a key function for securing them against unauthorized access. Considering that each of these lock types traditionally incorporates a key mechanism, it confirms that they all can be classified as requiring a key to unlock, making the answer comprehensive and accurate.