Lock and Key Systems (PY104.16) Practice Test

Access control relies on two traditional lock types: combination locks and key locks. The blank should be filled with combination, giving “Combination and key locks.” A combination lock opens by entering a numeric or alphanumeric sequence rather than using a physical key, which makes it useful for shared access or situations where issuing keys would be cumbersome. The combination can be changed or reset to revoke access, and electronic versions can log attempts for accountability. Key locks require possession of a physical key, providing straightforward control and traceability. Together, these two forms cover the common approaches to securing DoD facilities and equipment, with each method supporting different access-control needs. Other lock types exist, but they don’t represent the standard paired categories described in the statement.