NC LOCKSMITH EXAM SECTION 2 QUESTIONS AND VERIFIED ANSWERS ALREADY GRADED 100%

NC LOCKSMITH EXAM SECTION 2 QUESTIONS AND VERIFIED ANSWERS ALREADY GRADED 100% Bible - ANSWER-that portion of the cylinder shell which normally houses the pin chambers, especially those of a key-in-knob cylinder or certain rim cylinders Broach - ANSWER-1. A tool used to cut the keyway into the cylinder plug. 2. To cut the keyway into a cylinder with a broach CAM - ANSWER-1. A lock or cylinder component which transfers the rotational motion of a key or cylinder plug to the bolt works of the lock. 2. The bolt of a cam lock Chamber - ANSWER-any cavity in a cylinder plug and or shell which houses the tumblers Composite Keyway - ANSWER-a keyway that has been enlarged to accept more than one key section, often key sections of more than one manufacturer Disc Tumbler - ANSWER-1. A flat tumbler which can 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 the sidebar by the proper key. NOTE: sometimes called a wafer tumbler Graduated Drivers - ANSWER-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 Increment - ANSWER-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 Mogul Cylinder - ANSWER-a pin tumbler cylinder with a diameter of 2.0", whose pins, springs, key, etc. may also be proportionally increased in sized, it is frequently used in prison locks Mortise Cylinder - ANSWER-A threaded cylinder typically used in mortise locks of American manufacture Mushroom pin - ANSWER-a pin tumbler, usually a top pin, which resembles a mushroom. It is typically used to increase pick resistance Paracentric - ANSWER-Of or pertaining to a keyway with one or more wards on each side projecting beyond the vertical center line of the keyway Peanut cylinder - ANSWER-a mortise cylinder of 3/4" diameter Pin chamber - ANSWER-the corresponding hole drilled into the cylinder shell and/or plug to accept pins and springs Pin stack - ANSWER-all the tumblers in a given pin chamber, see also pin stack height Pin stack height - ANSWER-the measurement of a pin stack, often expressed in units of the lock manufacturers increment or as an actual dimension Plug - ANSWER-the part of the cylinder which contains the keyway, with the tumbler chambers usually corresponding to those in the cylinder shell Plug follower - ANSWER-a tool used to allow the removal of the cylinder plug while retaining the the top pins, springs and/or other components within Plug holder - ANSWER-a holding fixture which assist in the loading of tumblers into a cylinder Profile cylinder - ANSWER-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 made outside of the United States Retainer - ANSWER-a component which is clipped, staked, or driven in place to maintain the working relationship of the other components Rim cylinder - 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 Scalp - ANSWER-a thin piece of metal which is usually crimped or spun onto the front of a cylinder. It determines the cylinders finish and may also serve as a plug retainer Shear line - ANSWER-a location in a cylinder at which specific tumbler surfaces must be aligned, removing obstructions which prevent the plug from moving Shell - ANSWER-the part of the cylinder which surrounds the plug and which usually contains tumbler chambers corresponding to those in the plug Shim - ANSWER-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 Spool pin - ANSWER-usually a top pin which resembles a spool, typically used to increase pick resistance Tailpiece - ANSWER-an actuator attached to the rear of the cylinder, parallel to the plug, typically used on rim, key-in-knob, or special application cylinders Tolerance - ANSWER-the deviation allowed from a given dimension Ward - ANSWER-a usually stationary obstruction in a lock or cylinder which prevents the entry and/or operation of an incorrect key