NC Locksmithing Section 10 & 11: Safes| Exam Questions with Complete Solutions 100%
Solved| Grade A+
Internal Relocking Device A device inside a safe case that prevents the lock bolt form being
retracted after an attack.
Key Change Referring to a lock in which the combination can be changed through the use of
a special key or tool without dissembling the lock.
Key Change Wheel A safe lock component that may have the orientation of its gate altered
via a special key and process.
Lever (Combination Lock) Part of a combination lock that engages the drive cam, when the
proper combination is supplied and is directly attached to the locking bolt.
Manipulate A dialing process typically used with combination locks to determine operational
status of the lock and to determine an opening combination.
Manipulation A opening method for mechanical combination locks which used the
tolerances of that lock to determine an opening combination.
Manipulation Proof A combination lock with features that prevent determining the
combination without physical attack.
Rear Drive Of or pertaining to a combination lock with the wheel pack located between the
dial and the drive cam.
Dial The component which allows a user to position the wheels of the lock and operate the
bolt when proper wheel alignment is achieved.
, Dial Ring Round Plate that provides a uniform bearing surface for the dial.
Key Locking Dial Ring A dial ring containing a key lock which throws a bolt into the underside
of the dial to prevent rotation.
Spy Proof Dial Ring Restricts unauthorized observation while dialing combination (as
opposed to a front reading dial and ring). These dials can be installed on virtually any
combination lock.
Wheel An assembly, usually in the form of a circular disc, having a gate and a drive pin
whose locations may be set to a selected positions to permit the user to change the
combination.
Drive Pin A pin extending from the underside of the drive cam and from all but the #1 wheel
pack. It transfers motion to the next components in the wheel pack.
Wheel Pack A set of wheels, fly's and isolation (spacing) washers supported by a torque
adjuster or tension washer and secured with a trainer.
Wheel Post A componenet, cast as part of the lock case or cover on which the wheel pack is
assembled and about which the wheels rotate (a bearing surface). This post should always
Wheel Number Each combination lock wheel is designated by the number, indicating which
number of the combination it responds to. The first wheel contains the first number of the
combination and is the furthest from the drive cam, the second wheel contains the second of
the combination, and the third wheel contains the third number of the combination.
Fly A part which is contacted by the drive pin of an adjacent drive cam or wheel to impart
motion to the wheel on which it rides, movable fly's increase the number of combination
possibilities.
Solved| Grade A+
Internal Relocking Device A device inside a safe case that prevents the lock bolt form being
retracted after an attack.
Key Change Referring to a lock in which the combination can be changed through the use of
a special key or tool without dissembling the lock.
Key Change Wheel A safe lock component that may have the orientation of its gate altered
via a special key and process.
Lever (Combination Lock) Part of a combination lock that engages the drive cam, when the
proper combination is supplied and is directly attached to the locking bolt.
Manipulate A dialing process typically used with combination locks to determine operational
status of the lock and to determine an opening combination.
Manipulation A opening method for mechanical combination locks which used the
tolerances of that lock to determine an opening combination.
Manipulation Proof A combination lock with features that prevent determining the
combination without physical attack.
Rear Drive Of or pertaining to a combination lock with the wheel pack located between the
dial and the drive cam.
Dial The component which allows a user to position the wheels of the lock and operate the
bolt when proper wheel alignment is achieved.
, Dial Ring Round Plate that provides a uniform bearing surface for the dial.
Key Locking Dial Ring A dial ring containing a key lock which throws a bolt into the underside
of the dial to prevent rotation.
Spy Proof Dial Ring Restricts unauthorized observation while dialing combination (as
opposed to a front reading dial and ring). These dials can be installed on virtually any
combination lock.
Wheel An assembly, usually in the form of a circular disc, having a gate and a drive pin
whose locations may be set to a selected positions to permit the user to change the
combination.
Drive Pin A pin extending from the underside of the drive cam and from all but the #1 wheel
pack. It transfers motion to the next components in the wheel pack.
Wheel Pack A set of wheels, fly's and isolation (spacing) washers supported by a torque
adjuster or tension washer and secured with a trainer.
Wheel Post A componenet, cast as part of the lock case or cover on which the wheel pack is
assembled and about which the wheels rotate (a bearing surface). This post should always
Wheel Number Each combination lock wheel is designated by the number, indicating which
number of the combination it responds to. The first wheel contains the first number of the
combination and is the furthest from the drive cam, the second wheel contains the second of
the combination, and the third wheel contains the third number of the combination.
Fly A part which is contacted by the drive pin of an adjacent drive cam or wheel to impart
motion to the wheel on which it rides, movable fly's increase the number of combination
possibilities.
