HGE

47問 • 2年前

Justin

通報

問題一覧

A type of flow where at any instant, the amount of fluid particles passing through a pipe section is constant.

Steady

According to USCS, particles with size greater than 75 mm are called:

Cobble

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

hydraulic grade line

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

decreases

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

load imposed onto the soil

According to Section 302.2.2 of NSCP, the slope of cut surfaces shall be no steeper than is safe for the intended use and shall be no steeper than:

1V:2H

This occurs when a cohesionless saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid.

liquefaction

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

remain the same

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

the effective pressure at the bottom of the layer will decrease

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 than 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 volume of voids and the volume of the soil mass.

porosity

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

moisture content

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

steady flow

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

cohesion

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

liquefaction

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

effective stress

Which of the following is not a soil component?

gas

A practice or procedure used to assess the partiele 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.

sieve analysis

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

gravel

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

none of these

Section 302.4.1 NSCP. Steepness of the fill (above natural ground) shall not exceed:

1:2

Section 302.2.2 NSCP. Steepness of the cut shall not exceed:

1:2

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

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 pressure surge or wave caused when a flid in motion is forced t6 stop or change direction suddenly (montentum change is referred to in hydraulics as

water hammer

At what temperature (°C) at which liquid water has the highest density?

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:

Pascals

What is the largest grain size that may pass through a No. 200 sieve?

0.074 mm

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

possess low shear strength

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

porosity

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

degree of saturation

In accordance with the Unified Soils Classification System, a soil grain having a size greater than No. 200 sieve opening (0 074 mm) but less than that of a No. 4 sieve (4.75 mm opening) is called:

sand

A granular soil deposit is considered medium dense if the blow count of a standard penetration test is between

10 to 30

if the ground water table in a soil formation rises as a result of flooding, the bearing capacity of the soil:

decreases

The ratio of the volume of air voids to the volume of voids is called?

air content

When the water table is close to the ground surface, the bearing capacity of a soil is reduced to?

1/2

The void ratio of a soil is defined as the ratio of the?

total volume of voids to the volume of soil solids

The earth pressure at rest is defined as the lateral pressure exerted by soil?

when the retaining wall has no movement relative to the backfill

Bulk density of soil is defined as the ratio of?

total mass of soil to the total volume of soil

The permeability of a given soil is?

directly proportional to the square of the average grain size

The change in volume of soil per unit of initial volume due to a given unit increase in pressure is called?

coefficient of volume compressibility

The decrease in void ratio per unit increase of pressure is called?

coefficient of compressibility

Molecules of fluid get attracted due to

cohesion

Equation of continuity of flow is based on the principle of

conservation of mass

Atmospheric pressure varies with

all of the above

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問題一覧

A type of flow where at any instant, the amount of fluid particles passing through a pipe section is constant.

Steady

According to USCS, particles with size greater than 75 mm are called:

Cobble

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

hydraulic grade line

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

decreases

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

load imposed onto the soil

According to Section 302.2.2 of NSCP, the slope of cut surfaces shall be no steeper than is safe for the intended use and shall be no steeper than:

1V:2H

liquefaction

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

remain the same

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

the effective pressure at the bottom of the layer will decrease

surface tension

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

degree of saturation

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

porosity

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

moisture content

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

steady flow

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

cohesion

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

liquefaction

effective stress

Which of the following is not a soil component?

gas

sieve analysis

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

gravel

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

none of these

Section 302.4.1 NSCP. Steepness of the fill (above natural ground) shall not exceed:

1:2

Section 302.2.2 NSCP. Steepness of the cut shall not exceed:

1:2

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

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 pressure surge or wave caused when a flid in motion is forced t6 stop or change direction suddenly (montentum change is referred to in hydraulics as

water hammer

At what temperature (°C) at which liquid water has the highest density?

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:

Pascals

What is the largest grain size that may pass through a No. 200 sieve?

0.074 mm

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

possess low shear strength

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

porosity

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

degree of saturation

In accordance with the Unified Soils Classification System, a soil grain having a size greater than No. 200 sieve opening (0 074 mm) but less than that of a No. 4 sieve (4.75 mm opening) is called:

sand

A granular soil deposit is considered medium dense if the blow count of a standard penetration test is between

10 to 30

if the ground water table in a soil formation rises as a result of flooding, the bearing capacity of the soil:

decreases

The ratio of the volume of air voids to the volume of voids is called?

air content

When the water table is close to the ground surface, the bearing capacity of a soil is reduced to?

1/2

The void ratio of a soil is defined as the ratio of the?

total volume of voids to the volume of soil solids

The earth pressure at rest is defined as the lateral pressure exerted by soil?

when the retaining wall has no movement relative to the backfill

Bulk density of soil is defined as the ratio of?

total mass of soil to the total volume of soil

The permeability of a given soil is?

directly proportional to the square of the average grain size

The change in volume of soil per unit of initial volume due to a given unit increase in pressure is called?

coefficient of volume compressibility

The decrease in void ratio per unit increase of pressure is called?

coefficient of compressibility

Molecules of fluid get attracted due to

cohesion

Equation of continuity of flow is based on the principle of

conservation of mass

Atmospheric pressure varies with

all of the above