1 Flashcards
Ratio of volume of voids and volume of soil
POROSITY
Ratio of volume of voids and volume of soil solids
VOID RATIO
Which is true for POROSITY?
I. 0 < n < 100
II. 0 <= n <= 100
III. 0 <= n
IV. 0 < n
I
Which is true for VOID RATIO?
I. 0 < e < 100
II. 0 <= e <= 100
III. 0 <= e
IV. 0 < e
IV
Which is true for DEGREE OF SATURATION?
I. 0 < S < 100
II. 0 <= S <= 100
III. 0 <= S
IV. 0 < S
II
Which is true for WATER CONTENT?
I. 0 < w < 100
II. 0 <= w <= 100
III. 0 <= w
IV. 0 < w
III
When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. This phenmenon is generally known
QUICK CONDITION/ BOILING CONDITION/ QUICK SAND
What is soil in civil engineering?
I. The material in a relatively thin surface zone within roots occur
II. The unaggregated and uncemented deposits of minerals and organic particles covering the earth’s crust
III. The substance existing on the earth’s surface, which grows and develops plants
IV. None of the above
II.
(Note: I. Soil in Geology; III. Soil in Agriculture)
The elastic tendency of liquids which makes them acquire the least surface area possible. It is responsible, for example, when an object or insect such as mosquitoes that is denser that water is able to float or run along the water surface.
SURFACE TENSION
The ratio between the volume of water and the volume of voids
DEGREE OF SATURATION
The ratio between the weight of water and the weight of solid particles
MOISTURE CONTENT
Minor losses through valves, fittings, bends, contractions, etc. are commonly modeled as proportional to
VELOCITY HEAD
The best hydraulic cross section for a trapezoidal channel of base width b is one for which the length of the side edge of the flow section is
b
When the path lines of the individual particles of a flowing liquid are irregular curves and continually cross each other and form a complicated network, the flow is called:
TURBULENT
Type of flow where the flow rate does not change over time
STEADY FLOW
Type of flow where the mean velocity of flow for a given length or reach is the same at every cross section
UNIFORM FLOW
Uninterrupted flow in a fluid near a solid boundary in which the direction of flow at every point remains constant
LAMINAR FLOW
Type of flow where at any time, the discharge or flow rate at every section at the stream is the same
CONTINUOUS FLOW
Type of flow in which, for a fixed rate of flow, the specific energy is minimum
CRITICAL FLOW
Type of flow in which the density of the fluid is constant from one point to another
INCOMPRESSIBLE FLOW
Type of flow in which the fluid particles rotate about their own axis while flowing along the streamlines
ROTATIONAL FLOW
On what fundamental concept is the continuity of flow primarily based?
CONSERVATION OF MASS
A branch of fluid mechanics that deals with the study of forces exerted by liquid in motion
HYDRODYNAMICS
The total pressure of force on a plane surface is equal to the area multiplied by the intensity of pressure at the centroid if the surface is:
A. horizontal
B. inclined
C. vertical
D. all of the above
D. all of the above