X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=guide%2Fchallenge-bot-questions.org;h=869dc7591829fbf3f238a6f3262824b9030e3129;hb=ba7c5f5abd63a2eaddfcad2917c9e8baaf5e4998;hp=ab338e64e58c15588036f400530a856add8d66e3;hpb=4b16c98d50fa43f98286dce7cf2c4ee2f51e6f49;p=challenge-bot

diff --git a/guide/challenge-bot-questions.org b/guide/challenge-bot-questions.org
index ab338e6..869dc75 100644
--- a/guide/challenge-bot-questions.org
+++ b/guide/challenge-bot-questions.org
@@ -1,17 +1,39 @@
 * challenge-bot questions
 ** mechanical questions
 *** arduino to deck
-    these questions are about attaching the arduino to the deck.  you used
-    a drill and drill bit to make holes for bolts to go through.  we
-    drilled through the arduino into the deck.
-    0. [@0] what would happen if you used a larger drill bit than the one
+    these questions are about attaching the arduino to the deck.
+    you used a drill and drill bit to make holes for bolts to go
+    through.
+    we drilled through the arduino into the deck.
+**** drilling
+    1. what would happen if you used a larger drill bit than the one
        you used for drilling holes for the arduino?
-    1. why do people use drill bits that are smaller or the same size as
-       existing holes in circuit boards, like the blue arduino?
     2. why did we use a drill bit that was wider than the body of the
        bolt used to hold the arduino?
-    3. why did we drill through the arduino, rather than marking holes
+    3. why do people use drill bits that are smaller or the same size as
+       existing holes in circuit boards, like the holes in the blue
+       arduino?
+    4. why did we drill through the arduino, rather than marking holes
        and using the drill to make holes where the marks were?
-    4. how does the drill hold onto the drill bit?
-    5. what would happen if the drill bit teeth were not flat on the
+    5. how does the drill hold onto the drill bit?
+    6. what would happen if the drill bit teeth were not flat on the
        drill bit?
+    7. how can you break the drill bit when drilling?
+    8. should we drill at full speed?
+       why or why not?
+**** bolts
+    1. the bolts used to attach the arduino are 6-32 bolts.
+       the bolts used to attach the motor to the motor mount are
+       4-40 bolts.
+       Are the 4-40 bolts fatter or thinner than the 6-32?
+    2. if you see a bolt described as =4-40x1.25=" how long is it?
+    3. on a =4-40= bolt, how many times does the thread wrap around
+       one inch of the body?
+       4 times?
+       40 times?
+       1. how many times does the thread of a =4-40= bolt wrap around
+          two inches of the body?
+          8 times?
+          40 times?
+          80 times?
+    4. what part of the screw does the screw driver go into?