diff --git a/src/scenarios/local/vibration_utterance.json b/src/scenarios/local/vibration_utterance.json
index 80d061a8..19e8434a 100644
--- a/src/scenarios/local/vibration_utterance.json
+++ b/src/scenarios/local/vibration_utterance.json
@@ -25,7 +25,7 @@
       "type": "Vibration",
       "text": "Calculate the bearing characteristic frequencies for a 6205 bearing running at 1800 RPM.",
       "category": "Bearing Analysis",
-      "characteristic_form": "The expected response should provide BPFO, BPFI, BSF, and FTF frequencies in Hz computed from the 6205 geometry (9 balls, ball_dia=7.94 mm, pitch_dia=39.04 mm) at 1800 RPM."
+      "characteristic_form": "The expected response should provide BPFO, BPFI, BSF, and FTF frequencies in Hz computed from the 6205 geometry (9 balls, ball_dia=7.938 mm, pitch_dia=38.5 mm) at 1800 RPM."
     },
     {
       "id": 305,
@@ -39,7 +39,7 @@
       "type": "Vibration",
       "text": "What is the vibration severity classification for a machine with an RMS velocity of 4.5 mm/s? It is a medium-sized machine on rigid foundations.",
       "category": "Condition Assessment",
-      "characteristic_form": "The expected response should classify 4.5 mm/s as ISO 10816 Zone B (acceptable) for a group2 machine, with thresholds context."
+      "characteristic_form": "The expected response should classify 4.5 mm/s as ISO 10816 Zone C (Alarm - not suitable for long-term operation) for a group2 machine, with thresholds context (A=1.4, B=2.8, C=7.1 mm/s)."
     },
     {
       "id": 307,