Question

The principle of fluid pressure that is used in hydraulic brakes or lifts is that.

• A. pressure is the same at all levels in a fluid.
• B. increases of pressure are transmitted equally to all parts of a fluid.
• C. the pressure at a point in a fluid is due to the weight of the fluid above it.
• D. increases of pressure can only be transmitted through fluids.

Answer 1

The correct option is B increases of pressure are transmitted equally to all parts of a fluid.

Answer is B.
Hydraulics is the use of a liquid under pressure to transfer force or motion, or to increase an applied force. The pressure on a liquid is called HYDRAULIC PRESSURE. And the brakes which are operated by means of hydraulic pressure are called HYDRAULIC BRAKES. These brakes are based on the principle of Pascals law.
The Pascal law states that 'The pressure exerted anywhere in a mass of confined liquid is transmitted undiminished in all directions throughout the liquid'.