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A force of 5,000lbs is applied to a plunger with an area of 25sqin. What is the system pressure?

  1. 100psi

  2. 150psi

  3. 200psi

  4. 250psi

The correct answer is: 200psi

To determine the system pressure, you can use the formula for pressure, which is defined as the force applied per unit area. The formula is: Pressure (P) = Force (F) / Area (A) In this scenario, a force of 5,000 lbs is applied to a plunger with an area of 25 sq in. Plugging these values into the formula gives: P = 5,000 lbs / 25 sq in = 200 lbs/sq in or psi Therefore, the pressure in the system is 200 psi. This correctly represents how pressure is calculated in a hydraulic system, showing that pressure increases when a greater force is applied over the same area. Understanding this relationship is critical for elevator mechanics, as it informs the design and functioning of hydraulic systems used in elevators.