問題一覧
1
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
2
In wastewater treatment, the process of removing fine residual suspended solids is known as
Filtration
3
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
4
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
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
What is the ratio of inertial force to elastic force known as?
Mach Number
7
Property of a fluid by which its own molecules are attracted is called
Cohesion
8
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
9
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
10
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
11
The dynamic viscosity of a fluid in the SI is in "Pascal second". It is equivalent to:
10 poise
12
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
13
A type of flow that occurs when the paths of the individual particles do not cross or interact.
Laminar Flow
14
When the metacenter of a floating body is lower than the center of gravity, then the body will be in
Unstable equilibrium
15
What is the ratio of inertial force to gravitation force known as?
Froude's Number
16
is an abrupt rise in water surface which results from retarding water flowing at a lower stage.
Hydraulic Jump
17
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
18
Which of the following states the law of buoyancy?
Archimedes
19
Metacentric height is given as the distance between:
the center of gravity of the body and the metacenter
20
A branch of hydraulics that deals with the study of forces (including velocity and acceleration) exerted by or upon liquids in motion.
Hydrodynamics
21
What is the ratio of inertial force to viscous force known as?
Reynolds Number