Would the Yellow shaded area near the bottom of a King Air's Fuel Quantity Guages (from around 0 - 200ish lbs remaining) be better described as a "caution range" or a "emergency fuel." I understand it is basically a "no-fly zone," yet the take home test I have in front of me says the yellow shaded area near 0 lbs remaining on the guages means either emergency fuel, or caution range.

Thanks in advance