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  • 問題数 21 • 11/13/2024

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    問題一覧

  • 1

    Metacentric height is given as the distance between:

    the center of gravity of the body and the metacenter

  • 2

    When the metacenter of a floating body is lower than the center of gravity, then the body will be in

    Unstable equilibrium

  • 3

    Which of the following states the law of buoyancy?

    Archimedes

  • 4

    The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to:

    Archimedes' principle

  • 5

    The pressure exerted onto a liquid is transmitted equally and undiminished to all portions of the liquid. This principle in fluid mechanics is known as

    Pascal's principle

  • 6

    The elasticity tendency of liquids which makes them acquire the least surface area possible. It is responsible, for example, when an object or insect such as a mosquito that is denser than water is able to float or run along the water surface.

    Surface Tension

  • 7

    A pressure surge or wave caused when a fluid in motion is forced to stop or change direction suddenly (momentum change) is referred to in hydraulics as

    Water Hammer

  • 8

    A line joining the points of highest elevation of water in a series of vertical open pipes rising from a pipeline in which water flows under pressure is referred to as

    Hydraulic Gradient

  • 9

    is an abrupt rise in water surface which results from retarding water flowing at a lower stage.

    Hydraulic Jump

  • 10

    In wastewater treatment, the process of removing fine residual suspended solids is known as

    Filtration

  • 11

    Property of a fluid by which its own molecules are attracted is called

    Cohesion

  • 12

    The elasticity tendency of liquids which makes them acquire the least surface area possible. It is responsible, for example, when an object or insect such as a mosquito that is denser than water can float or run along the water surface.

    Surface Tension

  • 13

    In any stream flowing steadily without friction the total energy contained is the same at every point in its path of flow. This principle is attributed to

    Bernoulli

  • 14

    A branch of hydraulics that deals with the study of forces (including velocity and acceleration) exerted by or upon liquids in motion.

    Hydrodynamics

  • 15

    When at any instant, the number of particles passing every cross-section of the stream is the same, the flow is said to be:

    Continuous Flow

  • 16

    A type of flow that occurs when the paths of the individual particles do not cross or interact.

    Laminar Flow

  • 17

    If with steady flow in any length of reach of a stream, the average velocity at every cross-section is the same, the flow is said to be:

    Uniform Flow

  • 18

    The dynamic viscosity of a fluid in the SI is in "Pascal second". It is equivalent to:

    10 poise

  • 19

    What is the ratio of inertial force to gravitation force known as?

    Froude's Number

  • 20

    What is the ratio of inertial force to viscous force known as?

    Reynolds Number

  • 21

    What is the ratio of inertial force to elastic force known as?

    Mach Number