PAST BOARDS Flashcards by Alecz Lazo

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

A. remain the same
B. become zero
C. increase
D. decrease

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

A. none of these
B. increase
C. remain the same
D. decrease

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Which of the following represents the percentages of liquid and plastic limit?

A. Relative Density
B. Porosity
C. Moisture Content
D. Degree of Saturation

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

A. The effective pressure at the bottom of the layer will increase
B. The effective pressure at the bottom of the layer will remain the same
C. The effective pressure at the bottom of the layer will decrease
D. None of these statements is correct

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Where is the metacenter for stable equilibrium?

A. above center of gravity
B. at the center of gravity
C. below the center of gravity
D. one half of the total draft

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When the metacenter of a floating body is lower than the center of gravity, then the body will be in?

A. unstable equilibrium
B. stable equilibrium
C. neutral equilibrium
D. none of the above

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The metacentric height is the distance between the

A. center of gravity of the floating body and the center of buoyancy
B. center of gravity if the floating body and the metacenter
C. metacenter and the center of buoyancy
D. original center of buoyancy and the new center of buoyancy

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The weight per unit volume of a liquid at a standard temperature and pressure

A. specific weight
B. specific gravity
C. mass density
D. none of the above

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A pressure surge or wave caused when a fluid in motion is forced to stop or change direction suddenly (momentum change)

A. hydraulic jump
B. potential head
C. hydrodynamics
D. water hammer

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A type of shock where the flow undergoes a sudden transition from swift flow to tranquil flow

A. water hammer
B. hydraulic jump
C. non-uniform flow
D. celerity

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A fluid property that measures the fluid’s resistance to shear stress

A. viscosity
B. density
C. bulk modulus of elasticity
D. surface tension

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The vena contracta of a circular orifice is approximately ___ diameter downstream from the inner face of the orifice plate:

A. 1/2
B. 1/3
C. 1/4
D. 2/3

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When the ship’s metacenter and center of gravity coincide at same point then the vessel is said to be in

A. equilibrium
B. stable equilibrium
C. unstable equilibrium
D. neutral eqiulibrium

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A force within the surface layer of a liquid that causes the layer to behave as an elastic sheet

A. celerity
B. buoyant force
C. surface tension
D. capillarity

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Rate of flow of energy with relation to channel bed

Specific Energy

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Minor losses through valves, fittings, bends, contractions etc. are commonly modeled as proportional to

A. total head
B. static head
C. velocity head
D. pressure drop

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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

A. b
B. b/2
C. 2b
D. square root of 3 times b

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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

A. uniform
B. laminar
C. continuous
D. turbulent

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Type of flow where the FLOW RATE DOES NOT CHANGE OVER TIME

A. continuous flow
B. laminar flow
C. steady flow
D. uniform flow

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Type of flow where the mean VELOCITY of flow for a given length or reach is THE SAME at EVERY CROSS SECTION

A. continuous flow
B. laminar flow
C. steady flow
D. uniform flow

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Uninterrupted flow in a fluid near a solid boundary in which the DIRECTION OF FLOW at EVERY POINT REMAINS CONSTANT

A. continuous flow
B. laminar flow
C. steady flow
D. uniform flow

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Type of flow where at any time, the discharge or flow rate at every section of the stream is the same

A. continuous flow
B. steady flow
C. critical flow
D. uniform flow

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Type of flow in which, for a fixed rate of flow, the specific energy is minimum

A. continuous flow
B. steady flow
C. critical flow
D. subcritical flow

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Type of flow in which the density of the fluid is constant from one point to another

A. continuous flow
B. steady flow
C. compressible flow
D. incompressible flow

if compressed, volume will change. And density is mass over volume

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Type of flow in which the fluid particles rotate about their own axis while flowing along the streamlines A. rotational flow B. steady flow C. irrotational flow D. incompressible flow

Which one of the following statements is not correct? A. specific energy is the total energy above the flow of an open channel B. for a given specific energy, two depths exist and these are called alternative depths C. velocity of the flow is critical at maximum specific energy D. critical velocity occurs at Froude number = 1

All other conditions and parameters remaining the same, water hammer pressure can be reduced by A. using pipe of greater diameter B. using pipe of greater wall thickness C. using a more elastic pipe D. increasing the velocity of the pressure wave

A - greater diameter means slower velocity

If a water tank, partially filled with water is being carried on a truck, moving with a constant horizontal ACCELERATION, the level of liquid will A. rise and fall alternately on the front side of the tank B. fall on the rear side of the tank C. remain the same on both side of the tank D. rise on the rear side and fall on the front side of the tank

D C if constant VELOCITY

As the depth of immersion of a vertical plane surface increase, the location of center of pressure A. comes closer to the center of gravity of the area B. moves apart from the center of gravity of area C. ultimately coincides with the center of gravity of the area D. remains unaffected

A C happens if horizontal yung area

In an open channel, water flows under A. force of gravity B. atmospheric pressure C. hydrostatic pressure D. mechanical pressure

The pressure exerted onto a liquid is transmitted undiminished to al portions of the liquid. This principle in fluid mechanics is attributed to: A. Archimedes B. Boyle C. Torricelli D. 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: A. Torricelli B. Bernoulli C. Pascal D. Boyle

The volume of a gas at constant temperature varies inversely as the pressure applied to the gas. This principle is attributed to A. Boyle B. Pascal C. Archimedes D. Bernoulli

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 A. Archimedes B. Pascal C. Torricelli D. Bernoulli

A theorem in fluid dynamics relating the speed of fluid flowing out of an orifice to the height of fluid above the opening A. Archimedes B. Pascal C. Torricelli D. Bernoulli

C ito yung v= square root of 2gh

The continuity equation is based on the principle of A. conservation of mass B. conservation of momentum C. conservation of energy D. conservation of force

A C is pang bernoulli

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 A. water hammer B. pressure wave C. flow hammer D. jet hammer

Which property of the fluid accounts for the major losses in pipes A. density B. specific gravity C. viscosity D. compressibility

An open vessel of water is accelerated up an inclined plane. The free water surface will A. be horizontal B. make an angle in direction of inclination of inclined plane C. make an angle in opposite direction to inclination of inclined plane D. any on of above is possible

The horizontal to vertical side slope in case of Cipolletti weir A. 1:1 B. 1:4 C. 1:2 D. 4:1

The horizontal component of the force on a curved surface is equal to A. weight of liquid vertically below the curved surface B. force on a vertical projection of the curved surface C. product of pressure at its centroid and the area D. weight of liquid retained by the curved area

B C is for plane surface

For the most economical trapezoidal open channel A. half of the top width must be equal to one of the sloping sides B. the hydraulic radius must be equal to half the depth of flow C. the semicircle drawn with top width as diameter must touch the three sides of the channel D. all of these

Gauge pressure is A. absolute pressure - atmospheric pressure B. absolute pressure + atmospheric pressure C. atmospheric pressure - absolute pressure D. none of these

In flow, the liquid particles may possess A. potential energy B. kinetic energy C. pressure energy D. all of the above

For most economical rectangular section of a channel, the depth is kept A. 1/4 of the width B. 3 times the hydraulic radius C. half the width D. none of these

Ratio of voids and volume of soil A. Porosity B. Degree of Saturation C. Void Ratio D. None of the above

Ratio of volume of voids and volume of soil solids A. Void Ratio B. Porosity C. Degree of Saturation D. None of the Above

Ratio of volume of water and volume of soil A. Degree of Saturation B. Void Ratio C. Porosity D. None of the Above

Which is true for porosity? A. 0 < n < 100 B. 0 <= n <= 100 C. 0 <= n D. 0 < n

Which is true for void ratio? A. 0 < e < 100 B. 0 <= e <= 100 C. 0 <= e D. 0 < e

Which is true for degree of saturation A. 0 < S < 100 B. 0 <= S <= 100 C. 0 <= S D. 0 < S

In the unit phase diagram for a soil mass A. The volume of water is taken as unity B. The total volume is taken as unity C. The weight of solids is taken as unity D. The volume of solids is taken as unity

Loam means A. Silty with little sand B. Sandy silt with little clay C. Clayey sand exhibiting slight cohesion D. Mixture of sand, silt, and clay size particles in approximately equal proportions

D basta EQUAL PROPORTIONS

Principle involved in the relationship between submerged unit weight and saturated unit weight of a soil is A. Darcy's Law B. Stoke's Law C. Archimedes' Principle D. Equilibrium of floating bodies

What is soil in civil engineering? A. The material in a relatively thin surface zone within roots occur B. The unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust C. The substance existing on the earth's surface, which grows and develops plants D. None of the above

What is soil in geology A. The material in a relatively thin surface zone within roots occur B. The unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust C. The substance existing on the earth's surface, which grows and develops plants D. None of the above

What is soil in agriculture? A. The material in a relatively thin surface zone within roots occur B. The unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust C. The substance existing on the earth's surface, which grows and develops plants D. None of the above

What is soil? A. The material in a relatively thin surface zone within roots occur B. The unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust C. The substance existing on the earth's surface, which grows and develops plants D. All of the above

In the triaxial test, the deviator stress increases the shear stress on what plane? A. Horizontal plane only B. Vertical plane only C. Both horizontal and vertical planes D. All planes except the horizontal and vertical planes

Which of the following tests is not done on a laboratory set up A. Direct shear test B. Vane shear test C. Triaxial test D. Unconfined compression test

B Butas, then ikot, then know shear capacity

A process by which water-saturated soil sediment temporarily lose strength and acts as a liquid A. Consolidation B. Plasticity C. Settlement D. Liquefaction

The soil which contains finest grain particles A. Coarse Sand B. Fine Sand C. Silt D. Clay

D Gravel Sand Silt Clay

If the plasticity index of the soil mass is zero, the soil is A. Sand B. Silt C. Clay D. Clayey Silt

Volume change in saturated soils caused by the expulsion of pore water from loading? A. Initial Consolidation B. Primary Consolidation C. Secondary Consolidation D. None of the above

B since EXPULSION OF PORE WATER Pwede ring REARRANGEMENT OF GRAINS Secondary Consolidation if DEFORMATION of grains

The neutral stress in a soil mass is A. Force per neutral area B. Force per effective area C. Stress taken up by the pore water D. Stress taken up by solid particles

Negative skin friction on piles A. Is caused due to relative settlement of the soil B. Is caused in soft clays C. Decreases the pile capacity D. All of the above

If the ground water table in a soil formation rises as resulting of flooding, the bearing capacity of the soil A. Increases B. Unaffected C. Decreases D. Depends on the footing load

One of the following foundation conditions does not affect the bearing capacity of the supporting soil A. Unit weight of the soil B. Depth of founding of footing C. Load imposed onto the soil D. Position of ground water table

A decrease in water content results in a reduction of the volume of soil in A. Liquid state B. Plastic state C. Semi-solid state D. All of these

D Constant volume pag solid lang

The water content in a soil sample when it continues to lose weight without losing the volume A. Shrinkage Limit B. Plastic Limit C. Liquid Limit D. Semi-Solid Limit

When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as A. Negative B. Zero C. Non-plastic D. 1

B If negative, take as zero Magiging Non Plastic if walang PL

A cohesionless soil is considered dense if the SPT "N" value is between A. 0 to 4 B. 10 to 30 C. 30 to 50 D. 4 to 10

A cohesionless soil is considered loose if the SPT "N" value is ebtween A. 0 to 4 B. 10 to 30 C. 30 to 50 D. 4 to 10

A cohesionless soil is considered very loose if the SPT "N" value is between A. 0 to 4 B. 10 to 30 C. 30 to 50 D. 4 to 10

Soil grains with particle size greater than 4.75 mm but less than 75 mm according to USCS A. Cobbles B. Gravel C. Boulder D. Sand

B Cobbles is 75 - 300 Boulders pag 300 pataas

Soil grains with particle size is greater than 75 mm according to USCS A. Cobbles B. Gravel C. Boulder D. Sand

A Cobbles is 75 - 300 Boulders pag 300 pataas

The maximum shear stress occurs on the filament which makes an angle with the horizontal plane equal to A. 30 deg B. 45 deg C. 60 deg D. 90 deg

A practice of 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 A. Consolidation test B. Standard penetration test C. Unconfined compression test D. Sieve analysis

The average coefficient of permeability of natural deposits A. Parallel to stratification is always greater than that perpendicular to stratification B. Parallel to stratification is always less than that perpendicular to stratification C. Is always same in both directions D. Parallel to stratification may or may not be greater than that perpendicular to stratification

Transporting and re-depositing soils is done by A. Water B. Glacier C. Gravity D. All of the above

Residual soils are formed by A. Glacier B. Wind C. Water D. None of the above

D they are formed at place of origin

Formed from the weathering of rocks and practically remain at the location of origin with little or no movement of individual soil particles A. Residual soils B. Transported soils C. Aeolian D. Alluvial

Those materials that have been moved from their place of origin by gravity, wind, water, glaciers, or human activity Formed from the weathering of rocks and practically remain at the location of origin with little or no movement of individual soil particles A. Residual soils B. Transported soils C. Aeolian D. Alluvial

Soil transported by wind A. Aeolian B. Alluvial C. Colluvial D. Glacial

Soil transported by water A. Aeolian B. Alluvial C. Colluvial D. Glacial

Soil transported by gravity A. Aeolian B. Alluvial C. Colluvial D. Glacial

Soil transported by glaciers or snow A. Aeolian B. Alluvial C. Colluvial D. Glacial

Textural classifications are merely based on A. Grain size B. Consistency limits C. Grain size and consistency limits D. Plasticity index

A Triangle na classification (%sand %silt %clay)

The minimum number of observation wells required to determine the permeability of a stratum in the field by a pumping test A. 1 B. 2 C. 3 D. None of the above

Consolidation is a function of A. Total stress B. Neutral stress C. Effective stress D. Does not depend upon the present stress

Allowable bearing pressure for a foundation depends upon A. Allowable settlement only B. Ultimate bearing capacity of soil only C. Both allowable settlement and ultimate bearing capacity D. None of the above

The over consolidation ratio of an overconsolidated soil is A. > 1 B. = 1 C. < 1 D. None of the above

The over consolidation ratio of a normally consolidated soil is A. > 1 B. = 1 C. < 1 D. None of the above

B If hindi one yan, edi sana lagi tayo nagsosolve ng pc

Pick up the correct statement from the following A. Failure plane carries maximum shear stress B. Failure plane does not carry maximum shear stress C. Failure plane carries shear stress equal to maximum shear stress D. None of these

At liquid limit a soil has A. No shearing strength B Negligible or very small shear strength C. High shear strength D. Nothing to do with shearing strength

Minimum specific energy of an open rectangular channel at critical depth A. 1/2 dc B. 1/3 dc C. 2/3 dc D. 3/2 dc

Which of the following does not describe real fluids A. Infinite viscosities B. Non-uniform velocity distribution C. Incompressible D. Experience friction and turbulence

C ideal fluid yan

The section on the jet here the contraction ceases A. Vena contracta B. Vena cava C. Vena contrata D. Vena canton

It is the speed at which the surge or wave is moving with respect to fluid medium A. Velocity of flow B. Water hammer C. Surge D. Celerity

What is the largest grain that passes a no. 200 sieve in millimeter A. 0.020 B. 0.064 C. 0.074 D. 0.0054

Section 302.2.2 of the National Structural Code of the Philippines provides that the slope of cut surfaces of the ground shall be no steeper than is safe for the intended use and shall be no steeper that: A. 1 to 3 B. 1 to 2 C. 1 to 1 D. 1 to 1.5

The fraction of soils passing which sieve number is used for Atterberg Limits tests of soils A. 60 B. 30 C. 50 D. 40

Accurate determination of water content is made by A. Calcium concreetee method B. Sand bath method C. Andei Dk bath method D. Oven-drying method

D C is faster but not accurate

Coefficient of consolidation of a soil is affected by A. Compressibility B. Permeability C. Both compressibility and permeability D. None

The total and effective stresses at a depth of 5m below the top level of water in a swimming pool are respectively A. 0 and 0 B. 5000 kg/cu.m and 0 C. 5000 kg/cu.m and 5000 kg/cu.m D. 1000 kg/cu.m and 5000 kg/cu.m

Is the samd in-situ is in its densest state, then the relative density of sand is A. 0 B. 1 C. 0 to 1 D. >1

PAST BOARDS Flashcards

(106 cards)