ask more bolt name and thread questions

diff --git a/guide/challenge-bot-questions.org b/guide/challenge-bot-questions.org
index 7949fe77169ae1f2496acdde58c98b5ed64329fb..db6d5ce08581602571079440e4fe6e1307d0acb9 100644 (file)
--- a/guide/challenge-bot-questions.org
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@@ -25,3 +25,8 @@
         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?
     11. if you see a bolt described as =4-40x1.25=" how long is it?
+    12. 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?
+    13. what part of the screw does the screw driver go into?