HGE TERMS

moisture-density test

A test in soil where the first mold is line with vaseline then a fully saturated soil is gradually poured into the mold. This soil test is known as:

Water retained as puddles

In hydrology, depression storage is:

Remain the same

In laboratory test of determining the maximum dry density of a soil, if the compaction pressure is increased, the maximum dry density will:

Bulk density

In soil properties, the ratio of the total mass to the total volume of solids is called:

Filtration

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

Temperature inversion

This occurs whenever the normal decrease of atmospheric temperature or moisture or both with height changes anomalously over a relatively short vertical interval.

hydrant

Which of the following devices regulates the distribution of flow of water?

None of these

Which of the following does not affect the settlement of a footing:

Practically impermeable

Which of the following is NOT a characteristic of a cohesionless soil.

Possess low shear strength

Which of the following is not a characteristic of cohesive soil?

Gas

Which of the following is not a soil component?

precipitation

Which of the following is the primary source of water supply?

Compressibility

Which of the following property of soil is necessary in the design of footing?

The effective pressure at the bottom of the layer will decrease

Which of the following statement is correct when the water table rises by 1 m?

The effective pressure at the bottom of the layer will decrease

Which of the following statements is correct when the water table rises to the ground surface?

Archimedes

Which of the following states the law of buoyancy?

arch dam

Which type of dam may potentially have the smallest cross section?

24 to 48

A cohesive soil deposit is considered soft if the unconfined compression strength in kPa is between:

Aqueduct

A conduit, closed or open , designed to convey water from a source to a point, usually a reservoir, where the distribution system begins

Steady flow

A flow in which the velocity of the fluid at a particular fixed point does not change with time.

rating curve

A graph that plots the measured stream flow discharge versus water surface elevation.

Hydraulic gradient

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

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

isobar

A line on a weather map connecting points of equal atmospheric pressure is called:

Liquefaction

A phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading.

Effective stress

A pile of sand keeps from spreading out like a liquid because the weight of the sand keeps the grain stuck together in their current arrangement, mostly out of static friction. This weight and pressure is called.

Sieve analysis

A practice or procedure used to assess the particle size distribution (also called gradation) of a granular material. The size distribution is often of critical importance to the way the material performs in use.

Hydrodynamics

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

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

Sewage

A sewage pipe carries:

Sanitary Sewer

A sewer intended to carry only sanitary sewage.

Effluent stream

A stream channel with perennial flow

Ozone

A strong oxidizing agent. It improves the effectiveness of subsequent coagulation, apparently by polymerization of metastable organics; aids in removal of musty, earthy, fishy and muddy tastes and odors. It breaks down the unstable gas into two atoms of oxygen.

Joules

A unit for work in N-m is called:

shear stress and angular deformation rate

Absolute viscosity of a fluid varies with pressure and temperature and is defined as function of

Gravel

According to USCS, what do you call a soil grain with grain size greater than 4.75 mm but less than 75 mm?

Cohesion

Which component of rock or soil is independent of interparticle friction?

Half circle

Assuming the same cross-sectional area and slope, which of the following open channel shapes will give the highest discharge?

varies directly as the velocity

At or below critical velocity in small pipe or at a very low velocities, the loss of head due to friction:

nitrogen

Dry air consist of different gases. Which of the following component has the greatest quantity.

isentropic

If heat transfer Q is zero and the flow is frictionless it is called

Decreasing

If the ground water table in a soil formation rises as a resulting of flooding, the bearing capacity of the soil

viscous shear between particles of fluid

In a perfectly smooth pipe with laminar flow, the coefficient of pipe friction is due to:

Bernoulli

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

Equipotential lines

In flow net construction of determining seepage flow, the paths of equal energy is called:

stagnatic pressure

It is the increased pressure developed on impact with the Pitot tube as a result of localized kinetic energy reduction to zero.

price current meter weir formulas open channel formulas

Name method(s) of measuring stream flow.

Position of groundwater table

One of the following foundation conditions does not affect the bearing capacity of the supporting soil

1 to 2

Section 302.2.2 of the National Structural Code of the Philippines provides that the slope of cut surfaces shall be no steeper than is safe for intended use and shall be no steeper than

Dry density

Soil mass consists of solid particles, water, and air. The combined volume of water and air is called voids and its ratio with the volume of solid particles is called void ratio. The ratio of the mass of solid to the total volume of soil is termed as:

Surface tension

The elastic 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 than water is able to float or run along the water surface.

Pascal

The fundamental reference dimensions are mass, length and time. The fundamental SI units for them are kilogram (kg), meter (m), and seconds (s), respectively. The unit of force derived from these units in Newton (N). Consequently, the unit pressure N/m^2 is called:

uniform velocity

The hydraulic and energy gradients for a straight pipe and uniform diameter are parallel with each other because of:

Pascals

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

Void ratio

The ratio between the volume of voids and the volume of the soil mass.

Degree of saturation

The ratio between the volume of water and the volume of voids:

Moisture Content

The ratio between the weight of water and the weight of solid particles.

Porosity

The ratio of the volume of voids to the total volume of soil.

Porosity

The ratio of the volume of voids to the total volume of the soil is called:

Degree of Saturation

The ratio of the volume of water to the volume of voids.

Degree of saturation

The ratio of the volume of water to the volume of voids.

absolute roughness of the interior surface and diameter

The relative roughness of a pipe is dependent on:

Decrease

When water table rises, what is its effect on effective stress?

Reynolds Number

This is a measure of the relative importance of inertial forces to viscous forces. At sufficient high values, flow becomes turbulent.

Tainter gate

Type of gate used for large installations

Subcritical

Water flows over a spillway and into a horizontal canal. If the water undergoes a jump, what is the depth of flow after the jump?

ratio of inertia forces to surface tension

Weber number is a

Safe yield

What is the maximum quantity of water, which can be guaranteed during a critical dry period?

chemical oxygen demand

What is the measurement of the amount of oxygen required to stabilize the waste completely?

soil moisture

What is the term for capillary water in the smaller pore surface of the soil?

Filtration

What method of wastewater treatment method involves removing settleable solids and thickening of sludge?

siphon spillway

What spillway of a dam is suited where space is limited?

screening

What wastewater treatment that involves the removal of course and settleable solids by interception

Continuous

When at any instant, the number of particles passing every section of the stream are always equal, the flow is said to be

Turbulent

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: