jacksonstrand4 jacksonstrand4 27-02-2020 Engineering contestada Which statement about hydraulic jacks is true? Which statement about hydraulic jacks is true? The Answer Is BA. They multiply a force by making a gas flow through a valve. B. They multiply a force by transmitting it through oil. C. The forces at the input and the output are the same. D. The output pressure is much greater than the input pressure.