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   1 * challenge-bot questions
   2 ** mechanical questions
   3 *** arduino to deck
   4     these questions are about attaching the arduino to the deck.
   5     you used a drill and drill bit to make holes for bolts to go
   6     through.
   7     we drilled through the arduino into the deck.
   8 **** drilling
   9     1. what would happen if you used a larger drill bit than the one
  10        you used for drilling holes for the arduino?
  11     2. why did we use a drill bit that was wider than the body of the
  12        bolt used to hold the arduino?
  13     3. why do people use drill bits that are smaller or the same size as
  14        existing holes in circuit boards, like the holes in the blue
  15        arduino?
  16     4. why did we drill through the arduino, rather than marking holes
  17        and using the drill to make holes where the marks were?
  18     5. how does the drill hold onto the drill bit?
  19     6. what would happen if the drill bit teeth were not flat on the
  20        drill bit?
  21     7. how can you break the drill bit when drilling?
  22     8. should we drill at full speed?
  23        why or why not?
  24 **** bolts
  25     1. the bolts used to attach the arduino are 6-32 bolts.
  26        the bolts used to attach the motor to the motor mount are
  27        4-40 bolts.
  28        Are the 4-40 bolts fatter or thinner than the 6-32?
  29     2. if you see a bolt described as =4-40x1.25=" how long is it?
  30     3. on a =4-40= bolt, how many times does the thread wrap around
  31        one inch of the body?
  32        4 times?
  33        40 times?
  34        1. how many times does the thread of a =4-40= bolt wrap around
  35           two inches of the body?
  36           8 times?
  37           40 times?
  38           80 times?
  39     4. what part of the screw does the screw driver go into?