Pascal's Principle Quiz
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Are you aware of Pascal's principle? Take this informative " Pascal's Principle Quiz" to test your knowledge. 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. If you have a physics test then it's the perfect quiz to test your basics. Good Luck!
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Questions and Answers
- 1.
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
- D.
1200N
Correct Answer
C. 1176 NExplanation
The force exerted on the larger piston can be calculated using the formula: force = pressure x area. The pressure exerted on the larger piston is the same as the pressure exerted on the smaller piston, as they are connected by a hydraulic fluid. Therefore, the force exerted on the larger piston is (force on smaller piston) x (area of larger piston / area of smaller piston). Plugging in the values given, we get: force = (force on smaller piston) x (0.5 square meters / 0.03 square meters) = (force on smaller piston) x 16.67. Solving for the force on the smaller piston, we find that it must be at least 1176 N in order to lift the vehicle.Rate this question:
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- 2.
Pascal's law applies to gases as well.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Pascal's law states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and to the walls of its container. This law applies to both liquids and gases, as they are both considered fluids. Therefore, the correct answer is true.Rate this question:
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- 3.
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.
- D.
Pressure exerted on the system is inversely proportional to the volume.
Correct Answer
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.Explanation
The correct answer is that 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. This is because pressure is equal to force divided by area, so if the area increases while the force remains the same, the pressure decreases. Therefore, in order to maintain the same pressure, the force must increase when the area increases. This is consistent with Pascal's principle, which states that pressure is transmitted equally in all directions in a confined fluid.Rate this question:
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- 4.
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.
- D.
No statement is true
Correct Answer
C. The pressure exerted on a small piston is equal to that on the larger piston.Explanation
In a hydraulic system, the pressure exerted on a small piston is equal to that on the larger piston. This is because the pressure in a fluid is transmitted equally in all directions. Therefore, the force applied to the small piston is magnified by the ratio of the areas of the small and large pistons, resulting in equal pressure on both pistons. This principle allows for the amplification of force in hydraulic systems, making them useful in various applications such as car brakes and construction equipment.Rate this question:
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- 5.
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
- D.
Thermal engines and electrical engines
Correct Answer
C. Cardiovascular system and jacksExplanation
The application of hydraulic systems includes the cardiovascular system and jacks. Hydraulic systems are used in the cardiovascular system to control blood flow and pressure. They are also used in jacks to lift heavy objects by applying force through the use of fluids.Rate this question:
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- 6.
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
- D.
200 Kg
Correct Answer
A. 148 kgExplanation
The force applied by the barber to raise the chair is equal to the force exerted by the chair on the customer. The force applied by the barber is calculated by multiplying the pressure exerted by the hydraulic piston (force/area) by the area of the piston the barber is pushing on. The force exerted by the chair on the customer is calculated by multiplying the pressure exerted by the hydraulic piston (force/area) by the area of the piston attached to the chair. Since the areas cancel out, the force applied by the barber is equal to the force exerted by the chair on the customer. Therefore, the chair can raise a customer with a mass of 148 kg.Rate this question:
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- 7.
Which is the practical application of the Pascal's law?
- A.
Hydraulic Press
- B.
Hydraulic Jack System
- C.
Brake System
- D.
All Of The Above
Correct Answer
A. Hydraulic PressExplanation
The practical application of Pascal's law can be seen in a hydraulic press. Pascal's law states that when pressure is applied to a fluid in a confined space, the pressure is transmitted equally in all directions. In a hydraulic press, a small force is applied to a small piston, which creates a pressure in the fluid. This pressure is then transmitted to a larger piston, which exerts a much greater force. This principle allows the hydraulic press to generate a large amount of force, making it useful for applications such as pressing, bending, and forming materials.Rate this question:
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- 8.
When was Pascal's Law discovered?
- A.
1652
- B.
1653
- C.
1654
- D.
1655
Correct Answer
B. 1653Explanation
Pascal's Law was discovered in 1653.Rate this question:
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- 9.
The pressure at the bottom of the tank that has liquid doesn't depend on what?
- A.
Nature of the liquid
- B.
Acceleration due to gravity
- C.
Area of the bottom
- D.
Height of the column
Correct Answer
C. Area of the bottomExplanation
The pressure at the bottom of the tank that has liquid doesn't depend on the area of the bottom. The pressure at the bottom of a liquid is determined by the height of the column of liquid above it and the density of the liquid. The area of the bottom does not affect the pressure because pressure is force per unit area, and the force exerted by the liquid depends on its weight, which is determined by the height of the column and the density of the liquid. The area of the bottom only affects the total force exerted by the liquid, not the pressure.Rate this question:
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- 10.
According to Archimedes' Law, the loss of weight in the body in the liquid is equal to.
- A.
Weight of the total liquid
- B.
Weight of the body
- C.
Height of the column
- D.
Weight of liquid displaced
Correct Answer
D. Weight of liquid displacedExplanation
According to Archimedes' Law, the loss of weight in a body submerged in a liquid is equal to the weight of the liquid displaced. This means that when an object is placed in a liquid, it will experience a decrease in weight equal to the weight of the liquid that is pushed aside or displaced by the object. This principle explains why objects float or sink in a liquid, as the buoyant force exerted on the object is equal to the weight of the liquid it displaces.Rate this question:
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Jan 03, 2024Quiz Edited by
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Expert Reviewed by
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Oct 21, 2015Quiz Created by
Monicayht94
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