Test About Pascal's Principle
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Pascal’s principle, also called Pascal’s law, in fluid (gas or liquid) mechanics, statement that, in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container. The principle was first enunciated by the French scientist Blaise Pascal.
- 1.Which of the following is true about the hydraulic system?
- A.
The pressure exerted on a smaller piston is greater than on the larger piston.
- B.
The pressure exerted on a larger piston is greater than on the smaller piston.
- C.
The pressure exerted on a small piston is equal to that on the larger piston.
- 2.A barber raises his customer’s chair by applying a force of 150N to a hydraulic piston of area 0.01 m2. If the chair is attached to a piston of area 0.1 m2, how massive a customer can the chair raise? Assume the chair itself has a mass of 5 kg.
- A.
148 kg
- B.
130 kg
- C.
1500 kg
- 3.A hydraulic system is used to lift a 2000 kg vehicle in an auto garage. If the vehicle sits on a piston of area 0.5 square meter, and a force is applied to a piston of area 0.03 square meters, what is the minimum force that must be applied to lift the vehicle?
- A.
120 N
- B.
550 N
- C.
1176 N
- 4.Which of the following is the application of hydraulic system?
- A.
Heat engines and cardiovascular system
- B.
Heat engines and heat pumps
- C.
Cardiovascular system and jacks
- 5.Which of the following statements is true?
- A.
If the second area is greater than the first area, then the second force exerted on the system should be greater than the first force.
- B.
Pascal principle states that the pressure exerted to a confined fluid is not transmitted uniformly in all direction.
- C.
Pressure exerted on the system is directly proportional to the volume.
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