Fluid Dynamics and System Mechanics Quiz
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Questions and Answers

What is the primary difference between cohesion and adhesion in fluids?

  • Cohesion is stronger than adhesion in all fluid types.
  • Cohesion only occurs in solids.
  • Adhesion affects the shape of the liquid more than cohesion.
  • Cohesion refers to the attraction between similar molecules, while adhesion refers to the attraction between different molecules. (correct)

    • Which of the following correctly describes a characteristic of gases?

  • Gases have higher viscosity than liquids.
  • Gases are more compressible than liquids due to larger intermolecular spaces. (correct)
  • Gases exhibit surface tension similar to liquids.
  • Gases have a definitive shape and fixed volume.

    • In fluid dynamics, which flow type is characterized by smooth and orderly movement?

  • Turbulent flow
  • Laminar flow (correct)
  • Hydraulic flow
  • Compressible flow

    • What is the primary factor that differentiates hydraulic systems from pneumatic systems?

    <p>Hydraulic systems use incompressible fluids, whereas pneumatic systems use compressible gases.</p> Signup and view all the answers

    What does viscosity measure in a fluid?

    <p>The resistance of a fluid to flow.</p> Signup and view all the answers

    Which of the following correctly describes the relationship between inputs and outputs in a system?

    <p>Any alteration in inputs will directly affect the outputs.</p> Signup and view all the answers

    What is a common example of a side effect in a system?

    <p>Dizziness experienced from using an iPad.</p> Signup and view all the answers

    Given the formula MA = output force / input force, which scenario would validly represent high mechanical advantage?

    <p>An input force of 20 N resulting in an output force of 100 N.</p> Signup and view all the answers

    What does the formula W = F x d represent in a system?

    <p>The work done based on the force applied over a distance.</p> Signup and view all the answers

    Which statement about outputs in a system is true?

    <p>Outputs represent the primary aim or benefit of the system.</p> Signup and view all the answers

    Which of the following best describes a physical system?

    <p>An entity composed of mechanical parts working together</p> Signup and view all the answers

    What is a subsystem?

    <p>A component system operating within a larger system</p> Signup and view all the answers

    Mechanical advantage can be defined as which of the following?

    <p>The ratio of load force to effort force in a system</p> Signup and view all the answers

    What distinguishes ideal mechanical advantage from actual mechanical advantage?

    <p>Ideal mechanical advantage is theoretical, while actual is measured under real conditions</p> Signup and view all the answers

    Which of the following statements about automation is true?

    <p>Automation utilizes robots primarily for repetitive and predictable tasks</p> Signup and view all the answers

    Which of the following best illustrates a social system?

    <p>A group of bees working together to build a hive</p> Signup and view all the answers

    Which of the following explains the role of mechanisms in physical systems?

    <p>They are the mechanical parts working collectively to perform tasks</p> Signup and view all the answers

    What is the significance of understanding mechanical advantage when using simple machines?

    <p>It helps determine efficiency and ease of use in performing tasks</p> Signup and view all the answers

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