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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?
  40 **** part placement
  41      1. name some reasons for the arduinos placement on the deck.
  42         1. could it have been placed diagonally?  why or why not?
  43         2. could it have been placed in any other location? why or why not?
  44         3. could it be upside-down?  why or why not?
  45      2. why are the motors between the wheels?
  46      3. why are the motors pointed towards the caster in the back?
  47      4. why are the battery packs between the wheels and caster
  48         (roughly)?
  49      5. where is the breadboard?
  50      6. where is the caster?
  51      7. why is the caster in the middle of the back, instead of on the
  52         left or right?
  53      8. should the black chip (motor controller) be on the left or the right
  54      9. why should the chip be on the right?
  55 **** misc.
  56      1. should you pick up a battery by the wires coming out of it?
  57      2. what are the wires coming out of the battery called?
  58      3. what's the difference between stranded and solid core wire?
  59      4. why are we using solid core wire for plugging into
  60         the breadboard?
  61      5. why do we put the glue dots on the side of the battery pack
  62         without the on/off switch?
  63      6. why do we wrap tape around the body of the motors?
  64      7. why do we put a zip tie around the motor?
  65      8. do you have a ratcheting socket wrench?
  66         what is a ratcheting socket wrench?
  67      9. what would happen if there were no caster on the back
  68         of the robot?
  69      10. what is the robot tread made out of?
  70      11. why is it difficult to push the sonar into the sonar holder?
  71      12. what would happen if the sonar were easy to push into the sonar
  72          holder?