Exam (elaborations)
NORTH CAROLINA PRACTICE LOCKSMITH EXAM
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NORTH CAROLINA PRACTICE LOCKSMITH EXAM
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NORTH CAROLINA PRACTICE LOCKSMITH EXAMn. 1. the number(s) which represent(s) the dimensions of the key
2. the actual cut(s) or combination of a
key - Answers-Bitting
n. a designation, unrelated to the bitting, assigned to a particular key combination for
future reference when additional keys or cylinders may be needed - Answers-Blind
Code
n. a hand held key bitting punch, often incorporating a trigger-like handle - Answers-
Clipper
n. 1. a designation assigned to a particular key combination for reference when
additional keys or cylinders may be needed. See also, "blind code", "direct code", and
"key symbol",
2. a standard for Life Safety, structural integrity, fire safety, etc., either incorporated into
the statutes of a given jurisdiction, or a model standard - Answers-Code
n. a key cut to a specific code rather than duplicated from a pattern key. it may or may
not conform to the lock manufacturer's specifications - Answers-Code Key
n. a code key which conforms to the lock manufacturer's specifications - Answers-Code
Original Key
n. the group of numbers which represent the bitting of a key and/or the tumblers of a
lock or cylinder - Answers-Combination
n. the bottom of a key cut - Answers-Cut Root
n. the shape of the bottom of a key cut. It may have a flat or radius of a specific
dimension, or be a perfect
"V - Answers-Cut Root Shape
n. a location in a cylinder at which specific tumbler surfaces must be aligned, removing
obstruction(s) which prevented the plug from moving - Answers-Shear Line
n. the dimensions from the stop to the center of the first cut and/or to the centers of
successive cuts - Answers-Spacing
n. the part of a key from which all cuts are indexed and which determines how far the
key enters the keyway - Answers-Stop (of a key)
n. that portion of the cylinder shell which normally houses the pin chambers, especially
those of a key-inknob
cylinder or certain rim cylinders - Answers-Bible
,n. 1. a tool used to cut the keyway into the cylinder plug 2. v. to cut the keyway into a
cylinder plug with a
broach - Answers-Broach
n. 1. a lock or cylinder component which transfers the rotational motion of a key or
cylinder plug to the
bolt works of a lock 2. the bolt of a cam lock - Answers-CAM
n. any cavity in a cylinder plug and/or shell which houses the tumblers - Answers-
Chamber
n. a keyway which has been enlarged to accept more than one key section, often key
sections of more
than one manufacturer - Answers-Composite Keyway
n. 1. a flat tumbler which must be drawn into the cylinder plug by the proper key so that
none of its
extremities extends into the shell 2. a flat, usually rectangular tumbler with a gate which
must be aligned
with a sidebar by the proper key - Answers-Disc Tumbler
n. a set of top pins of different lengths. Usage is based on the height of the rest of the
pin stack, in order
to achieve a uniform pin stack height. See also "compensate drivers" - Answers-
Graduated Drivers
n. a usually uniform increase or decrease in the successive depths of a key cut which
must be matched
by a corresponding change in the tumblers - Answers-Increment
n. a pin tumbler cylinder with a diameter of 2.0", whose pins, springs, key, etc. may also
be proportionally
increased in size. It is frequently used in prison locks - Answers-Mogul Cylinder
n. a threaded cylinder typically used in mortise locks of American manufacture -
Answers-Mortise Cylinder
n. a pin tumbler, usually a top pin, which resembles a mushroom. It is typically used to
increase pick
resistance - Answers-Mushroom Pin
adj. 1. of or pertaining to a keyway with one or more wards on each side projecting
beyond the vertical
center line of the keyway to hinder picking 2. of or pertaining to a key blank made to
enter such a keyway - Answers-Paracentric
, n. a mortise cylinder of 3/4" diameter - Answers-Peanut Cylinder
n. the corresponding hole drilled into the cylinder shell and/or plug to accept the pin(s)
and spring - Answers-Pin Chamber
n. all the tumblers in a given pin chamber, see also"pin stack height" - Answers-Pin
Stack
n. the measurement of a pin stack, often expressed in units of the lock manufacturer's
increment or as an actual dimension - Answers-Pin Stack Height
n. a set of keys used to make a code original key on a key duplicating machine to a lock
manufacturer's given set of key bitting specifications. Each key is cut with the correct
spacing to one depth only in all bitting positions, with one key for each depth. - Answers-
Depth Key Set
n. a series of blind codes and bittings which are directly related to those of another
bitting list - Answers-Derived Series
n. a designation assigned to a particular key which includes the actual combination of
the key - Answers-Direct Code
n. the dimension obtained by adding the root depth of a key cut to the length of its
corresponding bottom pin which establishes a perfect shear line. This will not
necessarily be the same as the actual plug diameter. - Answers-Effective Plug Diameter
n. the maximum allowable difference between adjacent cut depths - Answers-Maximum
Adjacent Cut Specification
abb. maximum adjacent cut specification - Answers-"MACS"
n. the dimension from the bottom of a cut on a key to the bottom of the blade - Answers-
Root Depth
n. the part of a cylinder which contains the keyway, with tumbler chambers usually
corresponding to those in the cylinder shell - Answers-Plug
n. a tool used to allow removal of the cylinder plug while retaining the top pins, springs,
and/or other
components within the shell - Answers-Plug Follower
n. a holding fixture which assists in the loading of tumblers into a cylinder plug -
Answers-Plug Holder
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