Oklahoma Locksmith Practice Exam

What is the purpose of the dead latch in lock mechanisms?

1. To prevent forced entry

2. To hold the door to the strike plate

3. To provide additional locking security

4. To allow easy access in emergency situations

The correct answer is: To hold the door to the strike plate

The purpose of the dead latch in lock mechanisms is primarily to hold the door to the strike plate. When the door is closed, the dead latch engages with the strike plate, securing the door in the closed position. This engagement provides stability and prevents the door from being pushed open without the proper key or mechanism to disengage the latch. While some dead latches can contribute to overall security by making unauthorized entry attempts more difficult, their primary function is not to prevent forced entry directly or to offer additional locking mechanisms, which are typically functions of deadbolts or additional locking systems. The design of a dead latch often allows for smooth operation while still maintaining the door's closeness to the frame, hence confirming its role in securing the door's position physically. The role of easy access in emergency situations is more associated with mechanisms like panic bars or other emergency exit devices, as dead latches can sometimes complicate rapid egress without proper tools or keys.