If hydraulic pressure is 1500 psi, which category does it fall under?

• A. 1200 psi
• B. 1200-1400 psi
• C. 1400-1600 psi
• D. 1600 psi

Answer: (C)

Think of categories as intervals that cover ranges of values. A value belongs to the interval that contains it. For 1500 psi, it’s greater than 1400 and less than 1600, so it lies in the 1400-1600 psi category. That’s why this is the best answer. If boundaries are inclusive, 1400 and 1600 would also fall into the same interval; if not, the exact boundary would determine which adjacent category they belong to, but most practice problems treat these ranges as inclusive to avoid ambiguity.