NC LOCKSMITH LATEST 2026 EXAM QUESTIONS AND
SOLUTIONS RATED A+
✔✔n. a keyway which has been enlarged to accept more than one key section, often
key sections of more
than one manufacturer - ✔✔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 - ✔✔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" - ✔✔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 - ✔✔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 - ✔✔Mogul Cylinder
✔✔n. a threaded cylinder typically used in mortise locks of American manufacture -
✔✔Mortise Cylinder
✔✔n. a pin tumbler, usually a top pin, which resembles a mushroom. It is typically used
to increase pick
resistance - ✔✔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 - ✔✔Paracentric
✔✔n. a mortise cylinder of 3/4" diameter - ✔✔Peanut Cylinder
✔✔n. the corresponding hole drilled into the cylinder shell and/or plug to accept the
pin(s) and spring - ✔✔Pin Chamber
,✔✔n. all the tumblers in a given pin chamber, see also"pin stack height" - ✔✔Pin Stack
✔✔n. the measurement of a pin stack, often expressed in units of the lock
manufacturer's increment or as an actual dimension - ✔✔Pin Stack Height
✔✔n. the part of a cylinder which contains the keyway, with tumbler chambers usually
corresponding to those in the cylinder shell - ✔✔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 - ✔✔Plug Follower
✔✔n. a holding fixture which assists in the loading of tumblers into a cylinder plug -
✔✔Plug Holder
✔✔n. a cylinder with a usually uniform cross section, which slides into place and usually
is held by a
mounting screw. It is typically used in mortise locks of non-U.S. manufacture. -
✔✔Profile Cylinder
✔✔n. a component which is clipped, staked, or driven in place to maintain the working
relationship of other components - ✔✔Retainer
✔✔n. a cylinder typically used with surface applied locks and attached with a back plate
and machine
screws. It has a tailpiece to actuate the lock mechanism - ✔✔Rim Cylinder
✔✔n. a thin piece of metal which is usually crimped or spun onto the front of a cylinder.
It determines the
cylinder's finish and may also serve as the plug retainer. - ✔✔Scalp
✔✔n. a location in a cylinder at which specific tumbler surfaces must be aligned,
removing obstruction(s)
which prevented the plug from moving - ✔✔Shear Line
✔✔n. the part of the cylinder which surrounds the plug and which usually contains
tumbler chambers
corresponding to those in the plug - ✔✔Shell
✔✔1. n. a thin piece of material used to unlock the cylinder plug from the shell by
separating the pin tumblers at the shear line, one at a time 2. v. to unlock a cylinder plug
from its shell by using a shim - ✔✔Shim
, ✔✔n. a pin with a uniform smaller diameter except at its ends. Typically a top pin used
to augment pick
resistance but also observed as bottom and master pins. - ✔✔Spool Pin
✔✔n. an actuator attached to the rear of the cylinder, parallel to the plug, typically used
on rim, key-in-knob or special application cylinders - ✔✔Tail Piece
✔✔n. the deviation allowed from a given dimension - ✔✔Tolerance
✔✔n. a usually stationary obstruction in a lock or cylinder which prevents the entry
and/or operation of an incorrect key - ✔✔Ward
✔✔n. the key section which enters all keyways of a multiplex key system - ✔✔All
Section Key Blank
✔✔n. a machine capable of cutting keys with manual operations limited to loading and
unloading key blanks. - ✔✔Automatic Key Machine
✔✔n. a key whose cuts are in the form of wavy grooves milled into the flat sides of the
key blade. The grooves usually run the entire length of the blade. - ✔✔Bell Type Key
✔✔n. 1. the part of the key which serves as the blade, usually for use in a warded or
lever tumbler lock 2. v. to cut a key - ✔✔Bit
✔✔n. the portion of a key which may contain the cuts and/or millings - ✔✔Blade
✔✔adj. uncut, see also "key blank" - ✔✔Blank
✔✔n. the portion of the blade opposite the cut edge of a single bitted key - ✔✔Bottom of
the Blade
✔✔n. the portion of the key which serves as a grip or handle - ✔✔Bow
✔✔n. a type of stop located near the key bow - ✔✔Bow Stop
✔✔n. 1. the movable assembly of a key machine which supports the key vise(s),
2. a changeable part of a clipper that holds the key blank - ✔✔Carriage
✔✔n. a blank designed to enter two or more simplex keyways - ✔✔Composite Blank
✔✔n. a keyway which has been enlarged to accept more than one key section, often
key sections of more than one manufacturer - ✔✔Composite Keyway
SOLUTIONS RATED A+
✔✔n. a keyway which has been enlarged to accept more than one key section, often
key sections of more
than one manufacturer - ✔✔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 - ✔✔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" - ✔✔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 - ✔✔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 - ✔✔Mogul Cylinder
✔✔n. a threaded cylinder typically used in mortise locks of American manufacture -
✔✔Mortise Cylinder
✔✔n. a pin tumbler, usually a top pin, which resembles a mushroom. It is typically used
to increase pick
resistance - ✔✔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 - ✔✔Paracentric
✔✔n. a mortise cylinder of 3/4" diameter - ✔✔Peanut Cylinder
✔✔n. the corresponding hole drilled into the cylinder shell and/or plug to accept the
pin(s) and spring - ✔✔Pin Chamber
,✔✔n. all the tumblers in a given pin chamber, see also"pin stack height" - ✔✔Pin Stack
✔✔n. the measurement of a pin stack, often expressed in units of the lock
manufacturer's increment or as an actual dimension - ✔✔Pin Stack Height
✔✔n. the part of a cylinder which contains the keyway, with tumbler chambers usually
corresponding to those in the cylinder shell - ✔✔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 - ✔✔Plug Follower
✔✔n. a holding fixture which assists in the loading of tumblers into a cylinder plug -
✔✔Plug Holder
✔✔n. a cylinder with a usually uniform cross section, which slides into place and usually
is held by a
mounting screw. It is typically used in mortise locks of non-U.S. manufacture. -
✔✔Profile Cylinder
✔✔n. a component which is clipped, staked, or driven in place to maintain the working
relationship of other components - ✔✔Retainer
✔✔n. a cylinder typically used with surface applied locks and attached with a back plate
and machine
screws. It has a tailpiece to actuate the lock mechanism - ✔✔Rim Cylinder
✔✔n. a thin piece of metal which is usually crimped or spun onto the front of a cylinder.
It determines the
cylinder's finish and may also serve as the plug retainer. - ✔✔Scalp
✔✔n. a location in a cylinder at which specific tumbler surfaces must be aligned,
removing obstruction(s)
which prevented the plug from moving - ✔✔Shear Line
✔✔n. the part of the cylinder which surrounds the plug and which usually contains
tumbler chambers
corresponding to those in the plug - ✔✔Shell
✔✔1. n. a thin piece of material used to unlock the cylinder plug from the shell by
separating the pin tumblers at the shear line, one at a time 2. v. to unlock a cylinder plug
from its shell by using a shim - ✔✔Shim
, ✔✔n. a pin with a uniform smaller diameter except at its ends. Typically a top pin used
to augment pick
resistance but also observed as bottom and master pins. - ✔✔Spool Pin
✔✔n. an actuator attached to the rear of the cylinder, parallel to the plug, typically used
on rim, key-in-knob or special application cylinders - ✔✔Tail Piece
✔✔n. the deviation allowed from a given dimension - ✔✔Tolerance
✔✔n. a usually stationary obstruction in a lock or cylinder which prevents the entry
and/or operation of an incorrect key - ✔✔Ward
✔✔n. the key section which enters all keyways of a multiplex key system - ✔✔All
Section Key Blank
✔✔n. a machine capable of cutting keys with manual operations limited to loading and
unloading key blanks. - ✔✔Automatic Key Machine
✔✔n. a key whose cuts are in the form of wavy grooves milled into the flat sides of the
key blade. The grooves usually run the entire length of the blade. - ✔✔Bell Type Key
✔✔n. 1. the part of the key which serves as the blade, usually for use in a warded or
lever tumbler lock 2. v. to cut a key - ✔✔Bit
✔✔n. the portion of a key which may contain the cuts and/or millings - ✔✔Blade
✔✔adj. uncut, see also "key blank" - ✔✔Blank
✔✔n. the portion of the blade opposite the cut edge of a single bitted key - ✔✔Bottom of
the Blade
✔✔n. the portion of the key which serves as a grip or handle - ✔✔Bow
✔✔n. a type of stop located near the key bow - ✔✔Bow Stop
✔✔n. 1. the movable assembly of a key machine which supports the key vise(s),
2. a changeable part of a clipper that holds the key blank - ✔✔Carriage
✔✔n. a blank designed to enter two or more simplex keyways - ✔✔Composite Blank
✔✔n. a keyway which has been enlarged to accept more than one key section, often
key sections of more than one manufacturer - ✔✔Composite Keyway
