A critical hydraulic gradient may occur when (A) Flow is in upward direction (B) Seepage pressure is in upward direction (C) Effective pressure is zero (D) All the above

A critical hydraulic gradient may occur when
(A) Flow is in upward direction
(B) Seepage pressure is in upward direction
(C) Effective pressure is zero
(D) All the above
by

1 Answer

Answer :

Answer: Option D
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Related questions

When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. This phenomenon is generally known (A) Quick condition (B) Boiling condition (C) Quick sand (D) All the above

Description : When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. ... known (A) Quick condition (B) Boiling condition (C) Quick sand (D) All the above

Last Answer : Answer: Option D

A flow net may be utilised for the determination of (A) Exit gradient (B) Seepage (C) Hydrostatic pressure (D) All the above

Description : A flow net may be utilised for the determination of (A) Exit gradient (B) Seepage (C) Hydrostatic pressure (D) All the above

Last Answer : Answer: Option D

The critical exist gradient of seepage water in soils, is (A) Directly proportional to the voids ratio (B) Inversely proportional to the specific gravity (C) Directly proportional to the specific gravity (D) None of these

Description : The critical exist gradient of seepage water in soils, is (A) Directly proportional to the voids ratio (B) Inversely proportional to the specific gravity (C) Directly proportional to the specific gravity (D) None of these

Last Answer : (D) None of these

The critical exist gradient of seepage water in soils, increases with (A) An increase in specific gravity (B) A decrease in specific gravity (C) A decrease in void ratio (D) Both (a) and (c)

Description : The critical exist gradient of seepage water in soils, increases with (A) An increase in specific gravity (B) A decrease in specific gravity (C) A decrease in void ratio (D) Both (a) and (c)

Last Answer : Answer: Option D

The seepage exit gradient in a soil is the ratio of A) Total head to the length of seepage (B) Flow line to slope (C) Head upstream to that at downstream (D) Head loss to the length of the seepage

Description : The seepage exit gradient in a soil is the ratio of A) Total head to the length of seepage (B) Flow line to slope (C) Head upstream to that at downstream (D) Head loss to the length of the seepage

Last Answer : Answer: Option D

If the viscosity of ground water is 1.00, the Slitcher's constant is 400, the effective size of soil particles in aquifer is 0.5 mm and hydraulic gradient is 1 in 80, the velocity of flow is (A) 0.25 m/day (B) 0.50 m/day (C) 1.00 m/day (D) 1.25 m/day

Description : If the viscosity of ground water is 1.00, the Slitcher's constant is 400, the effective size of soil particles in aquifer is 0.5 mm and hydraulic gradient is 1 in 80, the velocity of flow is (A) 0.25 m/day (B) 0.50 m/day (C) 1.00 m/day (D) 1.25 m/day

Last Answer : Answer: Option D

Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is maximum at the centre of the pipe. 4. Hydraulic gradient varies as the square of the mean velocity of flow. Which of these statements are correct? (a) 1, 2 , 3 & 4 (b) 1 & 3 only (c) 2 & 4 only (d)3 & 4 only

Description : Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is maximum at the ... 2 , 3 & 4 (b) 1 & 3 only (c) 2 & 4 only (d)3 & 4 only

Last Answer : (b) 1 & 3 only

Pick up the correct statement from the following: (A) The phenomenon of quicksand generally occurs in the cohesionless soil (B) At critical hydraulic gradient, the saturated sand becomes quick (C) The critical gradient depends on the void ratio and the specific gravity (D) All the above

Description : Pick up the correct statement from the following: (A) The phenomenon of quicksand generally occurs in the cohesionless soil (B) At critical hydraulic gradient, the saturated sand becomes quick (C) The critical gradient depends on the void ratio and the specific gravity (D) All the above

Last Answer : (D) All the above

If the unit weight of sand particles is 2.696 g/cc. and porosity in loose state is 44%, the critical hydraulic gradient for quick sand condition, is (A) 0.91 (B) 0.92 (C) 0.93 (D) 0.95

Description : If the unit weight of sand particles is 2.696 g/cc. and porosity in loose state is 44%, the critical hydraulic gradient for quick sand condition, is (A) 0.91 (B) 0.92 (C) 0.93 (D) 0.95

Last Answer : (D) 0.95

The porosity of a certain soil sample was found to be 80% and its specific gravity was 2:7; the critical hydraulic gradient will be estimated as (a) 0.34 (b) 0.92 (c) 1.0 (d) 1.5

Description : The porosity of a certain soil sample was found to be 80% and its specific gravity was 2:7; the critical hydraulic gradient will be estimated as (a) 0.34 (b) 0.92 (c) 1.0 (d) 1.5

Last Answer : (a) 0.34

The seepage force in a soil, is (A) Perpendicular to the equipotential lines (B) Proportional to the exit gradient (C) Proportional to the head loss (D) All the above

Description : The seepage force in a soil, is (A) Perpendicular to the equipotential lines (B) Proportional to the exit gradient (C) Proportional to the head loss (D) All the above

Last Answer : Answer: Option D

Pickup the incorrect statement from the following: (A) The invert of pressure conduit is independent of the grade of the hydraulic gradient line (B) The pressure conduits may be taken uphill upto a maximum height of 8.3 m (C) Aqueducts and tunnels sections are generally kept circular (D) None of these

Description : Pickup the incorrect statement from the following:  (A) The invert of pressure conduit is independent of the grade of the hydraulic gradient line  (B) The pressure conduits may be taken uphill ... m  (C) Aqueducts and tunnels sections are generally kept circular  (D) None of these 

Last Answer : (D) None of these 

Pick up the incorrect statement from the following: (A) As a wave of sea water approaches the coast line, it is generally accompanied by a drift of water in the direction of wave advance (B) The on-shore wind helps to produce wave action as well as rise of M.S.L. (C) A falling hydraulic gradient occurs in the direction of the wave (D) The wave while receding carries finer particles out to deep water

Description : Pick up the incorrect statement from the following: (A) As a wave of sea water approaches the coast line, it is generally accompanied by a drift of water in the direction of wave advance (B) ... in the direction of the wave (D) The wave while receding carries finer particles out to deep water

Last Answer : (C) A falling hydraulic gradient occurs in the direction of the wave

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge) (A) x1.5 (B) x0.8 (C) x-1.5 (D) x-0.8

Description : The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge) (A) x1.5 (B) x0.8 (C) x-1.5 (D) x-0.8

Last Answer : (B) x0.8

In a flow net (A) Flow lines and equipotential lines cross each other at right angles (B) Fields are rectangles whose length is twice the breadth (C) Smaller the dimensions of the field, smaller will be the hydraulic gradient and velocity of flow through it (D) For homogeneous soil, the curves are smooth and circular

Description : In a flow net (A) Flow lines and equipotential lines cross each other at right angles (B) Fields are rectangles whose length is twice the breadth (C) Smaller the dimensions of the field, ... gradient and velocity of flow through it (D) For homogeneous soil, the curves are smooth and circular

Last Answer : Option A

Pick up the incorrect statement from the following: (A) The rate of flow of water through a unit cross-sectional area under a unit hydraulic gradient, is called coefficient of permeability (B) The rate of flow of water through a vertical strip of the aquifer of unit width and full depth under a unit hydraulic gradient, is called coefficient of transmissibility (C) The flow of water through aquifers, is governed by the Darcy's law (D) The term 'transmissibility' was introduced by Meinzer

Description : Pick up the incorrect statement from the following: (A) The rate of flow of water through a unit cross-sectional area under a unit hydraulic gradient, is called coefficient of permeability (B) ... aquifers, is governed by the Darcy's law (D) The term 'transmissibility' was introduced by Meinzer

Last Answer : Answer: Option D

Flow net is used for the determination of (A) Quantity of seepage (B) Hydrostatic pressure (C) Seepage pressure (D) All the above

Description : Flow net is used for the determination of (A) Quantity of seepage (B) Hydrostatic pressure (C) Seepage pressure (D) All the above

Last Answer : (D) All the above

15. The hydraulic gradient line may be above or below the centre line of the pipe. A) True B) False

Description : 15. The hydraulic gradient line may be above or below the centre line of the pipe. A) True B) False

Last Answer : B

Pick up the correct statement from the following regarding the pressure conduits: (A) Pressure conduits are permitted to run ¾th full (B) Pressure conduits are always laid along down grades (C) The hydraulic gradient line always coincides the invert of the conduit (D) None of these

Description : Pick up the correct statement from the following regarding the pressure conduits:  (A) Pressure conduits are permitted to run ¾th full  (B) Pressure conduits are always laid along down grades  ... ) The hydraulic gradient line always coincides the invert of the conduit  (D) None of these

Last Answer : (D) None of these

The total energy line lies over the hydraulic gradient line by an amount equal to the (A) Pressure head (B) Velocity head (C) Pressure head + velocity head (D) Pressure head - velocity head

Description : The total energy line lies over the hydraulic gradient line by an amount equal to the (A) Pressure head (B) Velocity head (C) Pressure head + velocity head (D) Pressure head - velocity head

Last Answer : Answer: Option B

The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the (A) Pressure head(B) Velocity head (C) Pressure head + velocity head (D) Pressure head - velocity head

Description : The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the (A) Pressure head (B) Velocity head (C) Pressure head + velocity head (D) Pressure head - velocity head

Last Answer : Answer: Option A

Piping in a soil mass is a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit* b) Caused due to very low exit gradient c) Due to continuous passage of water through a series of well connected pores d) Due to loss of the strength of cohesion less soil because of upward flow of of water

Description : Piping in a soil mass is a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit* b) Caused due to very low exit gradient c) ... connected pores d) Due to loss of the strength of cohesion less soil because of upward flow of of water

Last Answer : a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit*

During seepage through a soil, direction of seepage is always (A) Parallel to equipotential lines (B) Perpendicular to stream lines (C) Perpendicular to equipotential lines (D) None of these

Description : During seepage through a soil, direction of seepage is always (A) Parallel to equipotential lines (B) Perpendicular to stream lines (C) Perpendicular to equipotential lines (D) None of these

Last Answer : Answer: Option C

The critical depth meter is used to measure (A) Velocity of flow in an open channel (B) Depth of flow in an open channel (C) Hydraulic jump (D) Depth of channel

Description : The critical depth meter is used to measure (A) Velocity of flow in an open channel (B) Depth of flow in an open channel (C) Hydraulic jump (D) Depth of channel

Last Answer : Answer: Option C

In which of the following cases, it is possible for flow to occur from low pressure to high pressure? (A) Flow of liquid upward in a vertical pipe (B) Flow through a converging section (C) Flow of air downward in a pipe (D) Impossible in a constant cross-section conduit

Description : In which of the following cases, it is possible for flow to occur from low pressure to high pressure? (A) Flow of liquid upward in a vertical pipe (B) Flow through a converging section (C) Flow of air downward in a pipe (D) Impossible in a constant cross-section conduit

Last Answer : (B) Flow through a converging section

Gravity conduits (A) Carry water under gravity (B) Follow the hydraulic gradient line (C) Are carried through tunnels in deep cuttings (D) All the above

Description : Gravity conduits  (A) Carry water under gravity  (B) Follow the hydraulic gradient line  (C) Are carried through tunnels in deep cuttings  (D) All the above

Last Answer : (D) All the above

If the specific gravity and voids in soil sample are G and e respectively, the hydraulic gradient i, is (A) (G - 1)/(1 + e) (B) (G + 1)/(1 - e) (C) (1 - G)/(1 + e) (D) (1 + G)/(1 + e)

Description : If the specific gravity and voids in soil sample are G and e respectively, the hydraulic gradient i, is (A) (G - 1)/(1 + e) (B) (G + 1)/(1 - e) (C) (1 - G)/(1 + e) (D) (1 + G)/(1 + e)

Last Answer : Answer: Option A

If is specific gravity of sand particles, is porosity, the critically hydraulic gradient (A) ic = (G + 1)/(1 - e) (B) ic = (G + 1)/(1 + e) (C) ic = (G - 1)/(1 + e) (D) ic = (G - 1)/(1 - e)

Description : If is specific gravity of sand particles, is porosity, the critically hydraulic gradient (A) ic = (G + 1)/(1 - e) (B) ic = (G + 1)/(1 + e) (C) ic = (G - 1)/(1 + e) (D) ic = (G - 1)/(1 - e)

Last Answer : Answer: Option C

20. The hydraulic gradient line is always parallel to the centre line of the pipe. A) Correct B) Incorrect

Description : 20. The hydraulic gradient line is always parallel to the centre line of the pipe. A) Correct B) Incorrect

Last Answer : B

To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than (A) 2.4 m above the hydraulic gradient (B) 6.4 m above the hydraulic gradient (C) 10.0 m above the hydraulic gradient (D) 5.0 above the hydraulic gradient

Description : To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than (A) 2.4 m above the hydraulic gradient (B) 6.4 m above the hydraulic gradient (C) 10.0 m above the hydraulic gradient (D) 5.0 above the hydraulic gradient

Last Answer : Answer: Option B

If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be (A) 8hp/l (B) 8hp/l² (C) 8hl/p (D) 8hl/p²

Description : If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be (A) 8hp/l (B) 8hp/l² (C) 8hl/p (D) 8hl/p²

Last Answer : Answer: Option B

In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is (A) 0.5 (B) 0.84 (C) 1.84 (D) 1.25

Description : In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is (A) 0.5 (B) 0.84 (C) 1.84 (D) 1.25

Last Answer : (C) 1.84

The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is A. 1 in 100 upward B. 1 in 500 upward C. 1 in 100 downward D. 1 in 503 upward

Description : The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is A. 1 in 100 upward B. 1 in 500 upward C. 1 in 100 downward D. 1 in 503 upward

Last Answer : ANS: C

At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be (A) Minimum (B) Maximum (C) Zero (D) Could be any value

Description : At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be (A) Minimum (B) Maximum (C) Zero (D) Could be any value

Last Answer : Answer: Option D

If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for (A) Horizontal sights (B) Inclined sights upward (C) Inclined sight downward (D) None of these

Description : If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for (A) Horizontal sights (B) Inclined sights upward (C) Inclined sight downward (D) None of these

Last Answer : (A) Horizontal sights

A hydraulic jump in a control meter will be formed above the control, if its original (A) Depth is more than critical depth (B) Depth is less than the critical depth (C) Depth is equal to critical depth (D) None of these

Description : A hydraulic jump in a control meter will be formed above the control, if its original (A) Depth is more than critical depth (B) Depth is less than the critical depth (C) Depth is equal to critical depth (D) None of these

Last Answer : Answer: Option B

A coarse-grained soil has a voids ratio 0.75, and specific gravity as 2.75. The critical gradient at which quick sand condition occurs, is (A) 0.25 (B) 0.50 (C) 0.75 (D) 1.00

Description : A coarse-grained soil has a voids ratio 0.75, and specific gravity as 2.75. The critical gradient at which quick sand condition occurs, is (A) 0.25 (B) 0.50 (C) 0.75 (D) 1.00

Last Answer : (D) 1.00

A point, in a compressible flow where the velocity of fluid is zero, is called (A) Critical point (B) Vena contractaC) Stagnation point (D) None of these

Description : A point, in a compressible flow where the velocity of fluid is zero, is called (A) Critical point (B) Vena contracta C) Stagnation point (D) None of these

Last Answer : Answer: Option C

A cantilever carries is uniformly distributed load W over its whole length and a force W acts at its free end upward. The net deflection of the free end will be (A) Zero (B) (5/24) (WL3 /EI) upward (C) (5/24) (WL3 /EI) downward (D) None of these

Description : A cantilever carries is uniformly distributed load W over its whole length and a force W acts at its  free end upward. The net deflection of the free end will be  (A) Zero  (B) (5/24) (WL3 /EI) upward  (C) (5/24) (WL3 /EI) downward  (D) None of these 

Last Answer : (B) (5/24) (WL3 /EI) upward

Liquid Helium at `2.2K` and at 1 atm pressure flows in the upward direction. It is because of its low

Description : Liquid Helium at `2.2K` and at 1 atm pressure flows in the upward direction. It is because of its low

Last Answer : Liquid Helium at `2.2K` and at 1 atm pressure flows in the upward direction. It is because ... . heat of vapourisation C. viscosity D. surface tension

The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called A. Inverted syphon B. Depressed sewer C. Sag pipe D. all of these

Description : The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called A. Inverted syphon B. Depressed sewer C. Sag pipe D. all of these

Last Answer : ANS: D

Which of the following law deals with hydraulic gradient in soil a. Fick lawb. Stoke lawc. Darcy lawd. Liebig law

Description : Which of the following law deals with hydraulic gradient in soil a. Fick law b. Stoke law c. Darcy law d. Liebig law

Last Answer : c. Darcy law

Show the difference between hydraulic gradient line & total energy line with the help of suitable diagram.

Description : Show the difference between hydraulic gradient line & total energy line with the help of suitable diagram.

Last Answer : Show the difference between hydraulic gradient line & total energy line with the help of suitable diagram.

At the point of boundary layer separation in fluid flow, the (A) Shear stress is maximum (B) Velocity gradient is flat (C) Density variation is maximum (D) Shear stress is zero

Description : At the point of boundary layer separation in fluid flow, the (A) Shear stress is maximum (B) Velocity gradient is flat (C) Density variation is maximum (D) Shear stress is zero

Last Answer : Option A

Darcy's law is applicable to seepage if a soil is (A) Homogeneous (B) Isotropic (C) Incompressible (D) All the above

Description : Darcy's law is applicable to seepage if a soil is (A) Homogeneous (B) Isotropic (C) Incompressible (D) All the above

Last Answer : (D) All the above

The quantity of seepage of water through soils is proportional to (A) Coefficient of permeability of soil (B) Total head loss through the soil (C) Neither (a) nor (b) (D) Both (a) and (b)

Description : The quantity of seepage of water through soils is proportional to (A) Coefficient of permeability of soil (B) Total head loss through the soil (C) Neither (a) nor (b) (D) Both (a) and (b)

Last Answer : Answer: Option D

Seepage through foundation in an earthen dam is controlled by providing (A) Rock toe (B) Horizontal blanket (C) Impervious cut off (D) Chimney drain

Description : Seepage through foundation in an earthen dam is controlled by providing (A) Rock toe (B) Horizontal blanket (C) Impervious cut off (D) Chimney drain

Last Answer : Answer: Option C

For the upstream face of an earthen dam, the most adverse condition for stability of slope is (A) Sudden drawdown (B) Steady seepage (C) During construction (D) Sloughing of slope

Description : For the upstream face of an earthen dam, the most adverse condition for stability of slope is (A) Sudden drawdown (B) Steady seepage (C) During construction (D) Sloughing of slope

Last Answer : Answer: Option A

Seepage through embankments in an earthen dam is controlled by (A) Drainage filters (B) Relief wells (C) Drain trenches (D) Provision of downstream berms

Description : Seepage through embankments in an earthen dam is controlled by (A) Drainage filters (B) Relief wells (C) Drain trenches (D) Provision of downstream berms

Last Answer : Answer: Option C

If the elevations along a road increase, the slope of the road along the longitudinal direction, is known as (A) Gradient (B) Grade (C) Positive grade (D) Negative grade

Description : If the elevations along a road increase, the slope of the road along the longitudinal direction, is known as (A) Gradient (B) Grade (C) Positive grade (D) Negative grade

Last Answer : Answer: Option A