Lock and Key Systems SPeD Exam
2026/2027 | Study Guide & Test Prep
the following are true of master key systems - correct answer-The great grand
master key opens all of the locks in the system
They are convenient for managers
Because of their inherent security risks, their use is discouraged
Master Key Systems - correct answer-A system with two or more levels of key
operation where there is a single master key that fits ALL of the locks in a facility
(i.e. office areas and barracks)
Lock Components - correct answer-1. Locking Device 2. Switching Device 3.
Operating Mechanism
Locking Device - correct answer-The part of the system that physically keeps the
area or container secured or locked (i.e. latches and bolts).
Switching Device - correct answer-The element that authorizes the locking device
to open (i.e. keys, cards, combinations, or biometrics).
, Operating Mechanism - correct answer-The part of the system that interacts with
the switching device to allow or deny entry into a given area or perimeter (i.e. a
cylinder).
Mortise Locks - correct answer-Door locks with both a latch and a bolt built into
the same mechanism; the two locking mechanisms operate independently of
each other. Often found in building entrance doors, office doors, and storage
closets. The most common type has a doorknob or thumb latch on each side of
the door.
Deadbolt Locks - correct answer-Are similar to cylindrical locks in that they are
mounted in a hole cut through the door. When the bolt is extended, applying
force to the end of this type of lock will not retract it. When used with a
cylindrical lock, provides the best security when the bolt extends far enough into
the jamb-that is, at least one inch.
Padlocks - correct answer-Portable locks used to protect against theft, vandalism,
sabotage, espionage, unauthorized use, and harm. Some authorized use of these
are typically used to deter unauthorized entry. DoD does authorize the use of
SOME types such as the S&G 826, but for high security, DoD authorizes the S&G
833C and 951.
Mortise Cylinder - correct answer-Used on locking units that are built into a door.
Installed by screw-in threads. Include aluminum framed doors on building
entrances.
Cylindrical Locks - correct answer-The most common of all door locks in use
today. They are used to secure office doors, storerooms, and exterior doors.
Some require a key to lock and unlock them. Others unlock with a key but must
2026/2027 | Study Guide & Test Prep
the following are true of master key systems - correct answer-The great grand
master key opens all of the locks in the system
They are convenient for managers
Because of their inherent security risks, their use is discouraged
Master Key Systems - correct answer-A system with two or more levels of key
operation where there is a single master key that fits ALL of the locks in a facility
(i.e. office areas and barracks)
Lock Components - correct answer-1. Locking Device 2. Switching Device 3.
Operating Mechanism
Locking Device - correct answer-The part of the system that physically keeps the
area or container secured or locked (i.e. latches and bolts).
Switching Device - correct answer-The element that authorizes the locking device
to open (i.e. keys, cards, combinations, or biometrics).
, Operating Mechanism - correct answer-The part of the system that interacts with
the switching device to allow or deny entry into a given area or perimeter (i.e. a
cylinder).
Mortise Locks - correct answer-Door locks with both a latch and a bolt built into
the same mechanism; the two locking mechanisms operate independently of
each other. Often found in building entrance doors, office doors, and storage
closets. The most common type has a doorknob or thumb latch on each side of
the door.
Deadbolt Locks - correct answer-Are similar to cylindrical locks in that they are
mounted in a hole cut through the door. When the bolt is extended, applying
force to the end of this type of lock will not retract it. When used with a
cylindrical lock, provides the best security when the bolt extends far enough into
the jamb-that is, at least one inch.
Padlocks - correct answer-Portable locks used to protect against theft, vandalism,
sabotage, espionage, unauthorized use, and harm. Some authorized use of these
are typically used to deter unauthorized entry. DoD does authorize the use of
SOME types such as the S&G 826, but for high security, DoD authorizes the S&G
833C and 951.
Mortise Cylinder - correct answer-Used on locking units that are built into a door.
Installed by screw-in threads. Include aluminum framed doors on building
entrances.
Cylindrical Locks - correct answer-The most common of all door locks in use
today. They are used to secure office doors, storerooms, and exterior doors.
Some require a key to lock and unlock them. Others unlock with a key but must
