Locksmith Study Set 1 Questions And Complete
Solutions 2024/25
Blind Code - Correct Answer a designation, unrelated to the bitting, assigned to a particular key
combination for future reference when additional keys or cylinders may be needed
Direct Code - Correct Answer a designation assigned to a particular key which includes the actual
combination of the key
indirect code - Correct Answer a designation assigned to a particular key which must be manipulated by
a qualifying notation such as "XX-450=DB
b-t - Correct Answer bow to tip
code - Correct Answer a designation assigned to a particular key combination for reference when
additional keys or cylinders may be needed.
code key - Correct Answer a key cut to a specific code rather than cut from a pattern key
code original key - Correct Answer a code key that conforms to the original lock manufacturer's
specifications
code series - Correct Answer ordered sequence of unique codes related to key combinations, key
sections and manufacturers
depth key set - Correct Answer set of keys used to make code original keys on a duplication machine
Dial Caliper - Correct Answer hinged instrument for measuring thickness or diameter
Micrometer - Correct Answer gauge that measures small distances or thicknesses between two faces.
,root depth - Correct Answer dimension from the bottom of a cut on a key to the bottom of the blade
t-b - Correct Answer tip to bow
bible - Correct Answer portion of the cylinder shell which normally houses the pin chambers, especially
those of a key in knob cylinder or certain rim cylinders
cam - Correct Answer a lock or cylinder component which transfers the rotational motion o f a key or
cylinder plug to the bolt of the cam lock
cam lock - Correct Answer complete locking assembly in the form of a cylinder whose cam is the actual
locking bolt
cap - Correct Answer a spring cover for a single pin chamber 2. a part which may serve as a plug
retainer and or a holder for the tailpiece
chamber - Correct Answer any cavity in a cylinder plug and or shell which houses the tumblers
composite keyway - Correct Answer A keyway which has been enlarged to accept more than one key
section often key sections of more than one manufacturer.
key in knob cylinder - Correct Answer cylinder used in key and knob applications
master wafer - Correct Answer a ward used in certain binary type disk tumbers in key and knob locks,
see also master pin number 1 see also stepped tumblers
mortise cylinder - Correct Answer A threaded cylinder typically used in mortise locks of American
manufacture
rim cylinder - Correct Answer 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
, tailpiece - Correct Answer An actuator attached to the rear of the cylinder, parallel to the plug, typically
used on a rim, key-n-knob, or special application cylinder
key in knob cylinder - Correct Answer
bit height - Correct Answer measurement from the post of a bit key outward to the end of the bit
bit key - Correct Answer key with one or more projecting bits
bit thickness - Correct Answer measurement of the bit from one side to the other
bit width - Correct Answer inserted into a lock, a measurement from leading edge to the trailing edge of
the bit
blade - Correct Answer portion of a key which may contain the cuts and or millings
blank - Correct Answer uncut "key" blank
bow - Correct Answer portion of the key which serves as grip or handle
bow stop - Correct Answer type of stop located near the key bow
bow to tip - Correct Answer n. a specification that a bitting combination is recorded starting at the bow
and proceeding to the tip
composite blank - Correct Answer a blank designed to enter two or more simplex keyways
key blank - Correct Answer any material manufactured to the proper size and configuration which
allows its entry into the keyway of a specific locking device.
Solutions 2024/25
Blind Code - Correct Answer a designation, unrelated to the bitting, assigned to a particular key
combination for future reference when additional keys or cylinders may be needed
Direct Code - Correct Answer a designation assigned to a particular key which includes the actual
combination of the key
indirect code - Correct Answer a designation assigned to a particular key which must be manipulated by
a qualifying notation such as "XX-450=DB
b-t - Correct Answer bow to tip
code - Correct Answer a designation assigned to a particular key combination for reference when
additional keys or cylinders may be needed.
code key - Correct Answer a key cut to a specific code rather than cut from a pattern key
code original key - Correct Answer a code key that conforms to the original lock manufacturer's
specifications
code series - Correct Answer ordered sequence of unique codes related to key combinations, key
sections and manufacturers
depth key set - Correct Answer set of keys used to make code original keys on a duplication machine
Dial Caliper - Correct Answer hinged instrument for measuring thickness or diameter
Micrometer - Correct Answer gauge that measures small distances or thicknesses between two faces.
,root depth - Correct Answer dimension from the bottom of a cut on a key to the bottom of the blade
t-b - Correct Answer tip to bow
bible - Correct Answer portion of the cylinder shell which normally houses the pin chambers, especially
those of a key in knob cylinder or certain rim cylinders
cam - Correct Answer a lock or cylinder component which transfers the rotational motion o f a key or
cylinder plug to the bolt of the cam lock
cam lock - Correct Answer complete locking assembly in the form of a cylinder whose cam is the actual
locking bolt
cap - Correct Answer a spring cover for a single pin chamber 2. a part which may serve as a plug
retainer and or a holder for the tailpiece
chamber - Correct Answer any cavity in a cylinder plug and or shell which houses the tumblers
composite keyway - Correct Answer A keyway which has been enlarged to accept more than one key
section often key sections of more than one manufacturer.
key in knob cylinder - Correct Answer cylinder used in key and knob applications
master wafer - Correct Answer a ward used in certain binary type disk tumbers in key and knob locks,
see also master pin number 1 see also stepped tumblers
mortise cylinder - Correct Answer A threaded cylinder typically used in mortise locks of American
manufacture
rim cylinder - Correct Answer 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
, tailpiece - Correct Answer An actuator attached to the rear of the cylinder, parallel to the plug, typically
used on a rim, key-n-knob, or special application cylinder
key in knob cylinder - Correct Answer
bit height - Correct Answer measurement from the post of a bit key outward to the end of the bit
bit key - Correct Answer key with one or more projecting bits
bit thickness - Correct Answer measurement of the bit from one side to the other
bit width - Correct Answer inserted into a lock, a measurement from leading edge to the trailing edge of
the bit
blade - Correct Answer portion of a key which may contain the cuts and or millings
blank - Correct Answer uncut "key" blank
bow - Correct Answer portion of the key which serves as grip or handle
bow stop - Correct Answer type of stop located near the key bow
bow to tip - Correct Answer n. a specification that a bitting combination is recorded starting at the bow
and proceeding to the tip
composite blank - Correct Answer a blank designed to enter two or more simplex keyways
key blank - Correct Answer any material manufactured to the proper size and configuration which
allows its entry into the keyway of a specific locking device.
