A buret is used only in titrations. If you see in the question "titrate" then the answer will automatically be buret.
Pipet is used for more precise measurements. Somebody on here told me that you only use pipets for small volume measurements <5 mL but there are some problems in destroyer and bootcamp that show the answer being pipet for volumes of 12.5 mL
SUMMARY:
if problem has "titration" in it the answer is buret
if problem is asking for a precise and accurate small measurement the answer is pipet