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