If the fluid pressure is 800 PSI and the piston area is 10 square inches, the force exerted on the piston will be

• A. 8000 Pounds
• B. 800 Pounds
• C. 80,000 Pounds
• D. 10 Pounds

Answer: (A)

This tests understanding that hydraulic force comes from multiplying pressure by the piston area. In the equation, pounds per square inch (psi) times square inches (in^2) gives pounds of force. So 800 psi × 10 in^2 equals 8000 pounds of force on the piston. If the area were larger, or the pressure higher, the force would scale accordingly. The other numbers would require different area values or misapplied units (e.g., an area of 1 in^2 would give 800 pounds; 100 in^2 would give 80,000 pounds).