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HGE 2

Which one of the following statements is not correct?

Velocity of flow is critical at maximum specific energy

All other conditions and parameters remaining the same, water hammer pressure can be reduced by

using pipe of greater diameter

If a water tank, partially filled with water is 1 being carried on a truck, moving with a constant horizontal acceleration, the level of liquid will

rise on the rear side and fall on the front side of the tank

As the depth of immersion of a vertical plane surface increase, the location of center of pressure

comes closer to the center of gravity of the area

In open channel water flows under

force of gravity

The pressure exerted onto a liquid is transmitted undiminished to all portions of the liquid. This principle in fluid mechanics is attributed to:

Pascal

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

The volume of gas at a constant temperature varies inversely as the pressure applied to the gas. This principle is attributed to:

Boyle

Any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force the magnitude of which is equal to the weight of the fluid displaced by the body. This principle is attributed to:

Archimedes

A theorem in fluid dynamics relating the speed of fluid flowing out of an orifice to the height of fluid above opening.

Torricelli

The continuity equation is based on the principle of:

conservation of mass

When a valve is suddenly closed on a liquid flowing through a long pipe, the pressure wave of high intensity thus generated is known as:

water hammer

Which property of the fluid accounts for the major losses in pipes?

viscosity

An open vessel of water is accelerated up an inclined plane. The free water surface will

make an angle in opposite direction to inclination of inclined plane

The horizontal to vertical side slope in case of Cipolletti weir

1:4

The horizontal component of the force on curved surface is equal to

force on a vertical projection of the curved surface

For the most economical trapezoidal open 2 channel,

All of these

Gauge pressure is

absolute pressure - atmospheric pressure

In flow, the liquid particles may possess

all the above

For most economical rectangular section of a channel, the depth is kept

half the width

A process by which water-saturated soil sediment temporarily loss strength and acts as a fluid.

liquefaction

The soil which contains finest grain particles, is

clay

If the plasticity index of a soil mass is zero, the soil is

sand

Volume change in saturated soils caused by the expulsion of pore water from loading?

Primary Consolidation

The neutral stress in a soil mass is

Stress taken up by the pore water

Negative skin friction on piles.

All of the above

If the ground water table in a soil formation rises as 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

A decrease in water content results in a reduction of the volume of soil in:

All of these

The water content in a soil sample when it continues to loose weight without loosing the volume, is called

Shrinkage limit

When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as:

Zero

A cohesionless soil is considered dense if the SPT "N" value is between

30 to 50

A cohesionless soil is considered loose if the SPT "N" value is between

4 to 10

A cohesionless soil is considered very loose if the SPT "N" value is between

0 to 4

Soil grains with particle size greater than 4.75 mm but less than 75 mm according to USCS.

Gravel

Soil grains with particle size is greater than 75 mm according to USCS.

Cobbles

The maximum shear stress occurs on the filament which makes an angle with the horizontal plane equal to:

45°

A practice of procedure used to asses 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.

Sieve Analysis

The average coefficient of permeability of natural deposits

Parallel to stratification is always greater than that perpendicular to stratification

Transporting and re-depositing soils, is done by

All of the Above

Residual soils are formed by

None of the above

Textural classifications are merely based on:

Grain size

The minimum number of observation wells required to determine the permeability of a stratum in the field by a pumping test is:

Two

Consolidation is a fuction of..

Function of the effective stress.

Allowable bearing pressure for a foundation depends upon:

Both allowable settlement and ultimate bearing capacity

The over consolidation ratio (OCR) of an over consolidated soil is:

Greater than 1

The over consolidation ratio (OCR) of a normally consolidated soil is:

Equal to 1

Pick up the correct statement from the following:

Failure plane does not carry maximum shear stress

At liquid limit a soil has

Negligible or very small shear strength

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