Take Our Masterkeying Quiz (See bottom for answers)
1. The pin stack is:
A. The sum of the heights of the bottom pin and all master pins in a chamber.
B. Another name for the chamber in which pin tumblers are inserted.
C. The over all height of all pin tumblers in a given chamber.
D. None of the above.
2. The driver spring is:
A. Placed on top of the pin tumblers in the chamber to exert pressure.
B. Part of the plug retainer assembly, it keeps the retainer from being unscrewed.
C. Forces the tailpiece into the spindle so rotating the plug opens the lock.
D. None of the above.
3. The bible:
A. Is another name for the shell portion of the cylinder.
B. Is the part of the shell where the pin tumblers can be found.
C. Refers to the book “Everything About Locks”
D. None of the above.
4. Top pins:
A. Are the same as driver pins.
B. Are used to cap the top of interchangeable cores.
C. Can sometimes be used as bottom pins when pinning Schlage Locks.
D. None of the above.
5. A uniform pin stack:
A. Is another name for graduated pin stack.
B. Is only found in interchangeable cores.
C. Is the only pin stack approved by the Uniform Building Code.
D. None of the above.
6. The root depth:
A. Is measured from the outside of the plug inside the chamber to the flat of the key.
B. Is the dimension from the bottom of the cut to the bottom of the blade.
C. Is the difference between successive key depths.
D. None of the above.
7. The operating key:
A. Is used only when referring to a change key that opens an interchangeable core.
B. Is the same as a control or rest key.
C. Is never a master key.
D. None of the above.
8. The sum of the root depth and the length of the corresponding pins that establish a shear line:
A. Is called the effective diameter of the plug or effective plug diameter.
B. Is also called split pin master keying.
C. Determine the uniform pin stack.
D. None of the above.
9. Maximum adjacent cut specification:
A. Is the center-to-center dimension, chamber-to-chamber.
B. For Schlage locks is .105”
C. Is determined by measuring the flats of keys with a dial caliper.
D. None of the above.
10. To accurately determine the root depth:
A. Use a key gauge.
B. Use either a straight yoke micrometer or dial calipers.
C. Use a key gauge, straight yoke micrometer, or dial calipers.
D. None of the above.
ANSWERS: c, a, b, a, a, b, d, a, d, b
