ask about bolt, and drill bit safety

diff --git a/guide/challenge-bot-questions.org b/guide/challenge-bot-questions.org
index 9da19687d63e3359765de3f5b6353c64310f55ec..7949fe77169ae1f2496acdde58c98b5ed64329fb 100644 (file)
--- a/guide/challenge-bot-questions.org
+++ b/guide/challenge-bot-questions.org
@@ -19,3 +19,9 @@
        1. could it have been placed diagonally?  why or why not?
        2. could it have been placed in any other location? why or why not?
        3. could it be upside-down?  why or why not?
+    8. should we drill at full speed?  why or why not?
+    9. how can you break the drill bit when drilling?
+    10. 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?
+    11. if you see a bolt described as =4-40x1.25=" how long is it?