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HPGE LF

Total questions: 83

Worksheet time: 42mins

Name
Class
Date
1.

Rise of water table above the ground surface causes:

a)

Equal decrease in pore water pressure and total stress

b)

Increase in pore water pressure but decrease in total stress

c)

Decrease in pore water pressure but increase in total stress

d)

Equal increase in pore water pressure and total stress

2.

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

a)

25 to 50

b)

50 to 100

c)

100 to 200

d)

0 to 25

3.

A cohesive soil deposit is considered stiff if the unconfined compression strength, in kPa, is between

a)

0 to 25

b)

100 to 200

c)

50 to 100

d)

25 to 50

4.

Ratio of weight of water and weight of soil solids.

a)

Moisture Content

b)

Degree of Saturation

c)

Porosity

d)

Void Ratio

5.

Which is true for porosity?

a)

0 < n < 100

b)

0 < n

c)

0 ≤ n

d)

0 ≤ n ≤ 100

6.

If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is

a)

Equal to specific gravity of soil

b)

Less than specific gravity of soil

c)

Independent of specific gravity of soil

d)

Greater than specific gravity of soil

7.

Water content of soil can

a)

Never be greater than 100%

b)

Be greater than 100%

c)

Be less than 0%

d)

Take values only from 0% to 100%

8.

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.

a)

Standard penetration test

b)

Consolidation test

c)

Sieve Analysis

d)

Unconfined compression test

9.

For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as

a)

Dry of OMC and dry of OMC

b)

Dry of OMC and wet of OMC

c)

Wet of OMC and dry of OMC

d)

Wet of OMC and wet of OMC

10.

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

a)

Shrinkage limit

b)

Plastic limit

c)

Liquid limit

d)

Semi-solid limit

11.

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

a)

Semi-solid state

b)

Liquid state

c)

Plastic state

d)

All of these

12.

What is the largest grain that passes a no. 200 sieve in millimeter?

a)

0.074

b)

0.020

c)

0.064

d)

0.0054

13.

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 1.5

c)

1 to 2

d)

1 to 1

14.

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

a)

water hammer

b)

turbulence

c)

oh shocks

d)

hydraulic jump

15.

Accurate determination of water content, is made by

a)

Buckling concrete method

b)

Andei Dk bath method

c)

Sand bath method

d)

Oven-drying method

16.

If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will:

a)

none of the above

b)

rise until its weight equals the buoyant force

c)

float

d)

tend to move downward and it may finally sink

17.

The increase in meta centric height

i) increases stability

ii) decreases stability

iii) increases comfort for passengers

iv) decreases comfort for passengers

The correct answer is:

a)

(i) and (iii)

b)

(i)and(iv)

c)

(ii) and (iii)

d)

(ii) and (iv)

18.

Type of flow where the mean velocity of flow for a given length or reach is the same at every cross section.

a)

laminar flow

b)

continuous flow

c)

uniform flow

d)

steady flow

19.

Type of flow where the flow rate does not change over time.

a)

steady flow

b)

continuous flow

c)

laminar flow

d)

uniform flow

20.

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

a)

continuous flow

b)

incompressible flow

c)

steady flow

d)

compressible flow

21.

Type of flow in which the fluid particles rotate about their own axis while flowing along the streamlines.

a)

steady flow

b)

rotational flow

c)

irrotational flow

d)

incompressible flow

22.

The horizontal to vertical side slope in case of Cipolletti weir?

a)

1:4

b)

1:1

c)

1:2

d)

4:1

23.

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 one of above is possible

24.

In flow, the liquid particles may possess

a)

pressure energy

b)

kinetic energy

c)

potential energy

d)

all the above

25.

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

a)

half the width

b)

none of these

c)

three times the hydraulic radius

d)

one-fourth of the width

26.

The energy acquired by a mass by virtue of contact with other masses having some form of energy is

a)

kinetic energy

b)

elevation energy

c)

pressure energy

d)

velocity energy

27.

If an open vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then

a)

there will be vacuum in the liquid

b)

the pressure in the liquid mass is greater than hydrostatic pressure

c)

the pressure throughout the liquid mass is atmospheric

d)

none of the above

28.

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

a)

2/3

b)

1/3

c)

1/2

d)

1/4

29.

The specific weight of water is 1000 kg/m3

a)

all the above

b)

at normal pressure of 760 mm

c)

at 4°C temperature

d)

at mean sea level

30.

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

a)

moves apart from the center of gravity of the area

b)

comes closer to the center of gravity of the area

c)

remains unaffected

d)

ultimately coincides with the center of gravity of the area

31.

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)

fall on the rear side of the tank

b)

rise and fall alternately on the front side of the tank

c)

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

d)

remain the same on both side of the tank

32.

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

33.

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

34.

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

35.

The shear strength of a soil:

a)

Decreases with decrease in normal stress

b)

Decreases with increase in normal stress

c)

Is inversely proportional to the angle of internal friction of the soil

d)

Is directly proportional to the angle of internal friction of the soil

36.

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

a)

100 to 200

b)

0 to 25

c)

50 to 100

d)

25 to 50

37.

The coefficient of compressibility of soil, is the ratio of:

a)

Strain to stress

b)

Stress to strain

c)

Stress to settlement

d)

Rate of loading to that of settlement

38.

Ratio of volume of water and volume of voids.

a)

Moisture Content

b)

Void Ratio

c)

Degree of Saturation

d)

Porosity

39.

Which is true for void ratio?

a)

0 < e < 100

b)

0 ≤ e ≤ 100

c)

0 ≤ e

d)

0 < e

40.

What is soil in civil engineering?

a)

The unaggregated and uncemented deposits of minerals and organic particles covering the earth’s crust

b)

The substance existing on the earth's surface, which grows and develops plants

c)

The material in a relatively thin surface zone within roots occur

d)

None of the above

41.

Voids ratio of a soil mass can

a)

Be zero

b)

Never be greater than unity

c)

Take values between 0 and 1 only

d)

Take any value greater than zero

42.

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

a)

Cobbles

b)

Gravel

c)

Boulder

d)

Sand

43.

Pick up the incorrect statement from the following:

a)

Permeability decreases with increase in the dry density of a compacted soil

b)

A wet side compacted soil is more compressible than a dry side compacted soil

c)

Compaction has no effect on the structure of a soil

d)

Dry side compaction soils swell more when given access to moisture

44.

The admixture of coarser particles like sand or silt to clay causes

a)

Decrease in both liquid limit and plasticity index

b)

Decrease in liquid limit and increase in plasticity index

c)

Decrease in liquid limit and no change in plasticity index

d)

Increase in both liquid limit and plasticity index

45.

An index used to identify the swelling potential of clay soils is called

a)

Plasticity Index

b)

Liquidity Index

c)

Consistency Index

d)

Activity

46.

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

a)

Load imposed onto the soil

b)

Unit weight of the soil

c)

depth of founding of footings

d)

Position of ground water table

47.

The fraction of soils passing which sieve number is used for Atterberg Limits tests of soils:

a)

60

b)

30

c)

50

d)

40

48.

It is called frequently in connection with any space having a pressure less than atmospheric pressure is called.

a)

Absolute

b)

Vacuum

c)

Gage

d)

Atmosphere

49.

If the sand in-situ is in its densest state, then the relative density of sand is

a)

Greater than 1

b)

Between 0 and 1

c)

1

d)

Zero

50.

Which of the following statements are correct:

I. EGL is always parallel to the HGL

II. EGL slopes downward in the direction flow, it will only rise with the presence of pump

III. EGL is always above the HGL

IV. Neglecting head loss, EGL is horizontal

a)

I,II, and III only

b)

II,III, and IV only

c)

III and IV only

d)

All of the above

51.

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

a)

pressure drop

b)

total head

c)

static head

d)

velocity head

52.

Uninterrupted flow in a fluid near a solid boundary in which the direction of flow at every point remains constant:

a)

laminar flow

b)

continuous flow

c)

steady flow

d)

uniform flow

53.

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)

turbulent

d)

continuous

54.

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

a)

critical flow

b)

continuous flow

c)

steady flow

d)

uniform flow

55.

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

56.

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

a)

weight of liquid vertically below the curved surface

b)

product of pressure at its centroid and the area

c)

force on a vertical projection of the curved surface

d)

weight of liquid retained by the curved area

57.

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

a)

density

b)

viscosity

c)

specific gravity

d)

compressiblity

58.

For the most economical trapezoidal open channel,

a)

the semicircle drawn with top width as diameter must touch the three sides of the channel

b)

half of the top width must be equal to one of the sloping sides

c)

the hydraulic radius must be equal to half the depth of flow

d)

All of these

59.

An ideal liquid has the characteristics of:

a)

inviscid

b)

perfectly elastic

c)

same as gas

d)

frictionless and incompressible

60.

When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

a)

linearly with radial distance

b)

as the square of the radial distance

c)

nversely as the square of the radial distance

d)

inversely as the radial distance

61.

In a rotating vessel containing water, what is the relationship between the height of the rise at the sides and the depth of the depression at the center?

a)

The rise at the sides is less than the depression at the center

b)

The rise at the sides is greater than the depression at the center

c)

There is no consistent relationship between the rise at the side and the depression at the center

d)

The rise at the sides is equal to the depression at the center

62.

In a triangular channel section, the most economical section is achieved when each of its sloping sides make an angle of ___ with vertical

a)

90

b)

30

c)

60

d)

45

63.

Which one of the following statements is not correct?

a)

Velocity of flow is critical at maximum specific energy

b)

Critical velocity occurs at Froude number = 1

c)

For a given specific energy, two depths exist and these are called alternate depths

d)

Specific energy is the total energy above the floor of an open channel

64.

In open channel water flows under

a)

hydrostatic pressure

b)

atmospheric pressure

c)

force of gravity

d)

mechanical pressure

65.

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

66.

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

a)

Boyle

b)

Archimedes

c)

Pascal

d)

Torricelli

67.

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

68.

Effective stress on soil:

a)

Increases voids ratio and decreases permeability

b)

Decreases both voids ratio and permeability

c)

Increases both voids ratio and permeability

d)

Decreases voids ratio and increases Permeability

69.

Ratio of volume of voids and volume of soil solids.

a)

Void Ratio

b)

Porosity

c)

Degree of Saturation

d)

Moisture Content

70.

Ratio of volume of voids and volume of soil.

a)

Void Ratio

b)

Porosity

c)

Degree of Saturation

d)

Moisture Content

71.

Which is true for degree of saturation?

a)

0 < S < 100

b)

0 ≤ S ≤ 100

c)

0 ≤ S

d)

0 < S

72.

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

a)

Gravel

b)

Cobbles

c)

Boulder

d)

Sand

73.

Which is true for moisture content?

a)

0 < ω < 100

b)

0 ≤ ω ≤ 100

c)

0 ≤ ω

d)

0 < ω

74.

Plasticity index is defined as the range of water content between

a)

Liquid and plastic limit

b)

Plastic limit and semi solid limit

c)

Semi-solid limit and liquid limit

d)

Liquid limit and solid limit

75.

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

a)

unaffected

b)

increases

c)

depends on the footing load

d)

decreasing

76.

Coefficient of consolidation of a soil is affected by

a)

Compressibility

b)

Permeability

c)

Both compressibility and permeability

d)

None

77.

The total and effective stresses at a depth of 0.5 m below the top level of water in a swimming pool is respectively:

a)

500 kg/m2 and zero

b)

500 kg/m2 and 500 kg/m2

c)

Zero and zero

d)

1000 kg/m2 and 500 kg/m2

78.

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/2

b)

b

c)

2b

d)

√3b

79.

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

a)

subcritical

b)

steady flow

c)

continuous flow

d)

critical flow

80.

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

81.

Gauge pressure is

a)

none of these

b)

atmospheric pressure - absolute pressure

c)

absolute pressure + atmospheric pressure

d)

absolute pressure - atmospheric pressure

82.

A manometer is a device used to measure:

a)

low pressure

b)

atmospheric pressure

c)

fluid pressure in pipes

d)

velocity of flow in channels

83.

The speed of a pressure wave through a pipe depends upon

a)

the length of pipe

b)

the bulk modulus for the fluid

c)

the viscosity of fluid

d)

the original head

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