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| Q. |
Hydraulic brakes in automobile work on – |
| A. | Poiseuille's principle |
| B. | Pascal's principle |
| C. | Archimedes' principle |
| D. | Bernoulli's principle |
| Answer» B. Pascal's principle | |
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Explanation: The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing glycol ethers or diethylene glycol, to transfer pres-sure from the controlling mechanism to the braking mechanism. It works on the principle of Pascal's law which states that "pressure at a point in a fluid is equal in all directions in space". When pressure is applied on a fluid it travels equally in all directions so that uniform braking action is applied on all wheels. |
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