A phreatic line is defined as the line within a dam section below which there are
(A) Positive equipotential lines
(B) Positive hydrostatic pressure
(C) Negative hydrostatic pressure
(D) Negative equipotential lines

1 Answer

Answer :

(B) Positive hydrostatic pressure

Related questions

Description : The phreatic line in an earth dam may be (A) Circular (B) Elliptical (C) Parabolic (D) A straight line

Last Answer : Option C

Description : Explain with neat sketch Phreatic line in earthen dam with pressure head at different point and show construction points of this line. 

Last Answer : Procedure for locating the Phreatic line i) Draw an earthen dam having upstream face AB with water surface. ii) On water surface measure distance BC = 0.3 L C is starting pt of base parabola. Let F' ... parabola i.e. Phreatic line. viii) Here G,Q1,Q2,Q3,Q4 and B represent Phreatic line 

Description : Explain phreatic line in earthen dam with a sketch.

Last Answer : Phreatic line in earthen dam1.The line in earthen dam section below which there is positive hydrostatic pressure exists. Phreatic line separates the dry and wet part of earthen dam body as it acts as boundry ... toe material. Hence, a rock toe is necessary to avoid removal of toe portion of dam. 

Description : The uplift pressure on the face of a drainage gallery in a dam is taken as (A) Hydrostatic pressure at toe (B) Average of hydrostatic pressure at toe and heel (C) Two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel (D) None of the above

Last Answer : Answer: Option C

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

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

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

Description : A concrete dam 15 m deep and 2 m wide containing water to a depth of 10 m .Find total hydrostatic pressure per meter run and centre of pressure on upstream face.

Last Answer : A concrete dam 15 m deep and 2 m wide containing water to a depth of 10 m .Find total hydrostatic pressure per meter run and centre of pressure on upstream face.

Description : The zero atmospheric pressure is at (A) Sea level (B) Water table (C) Phreatic surface (D) Both (B) and (C) of the above

Last Answer : (D) Both (B) and (C) of the above

Description : Pick up the incorrect statement from the following: (A) The smaller the size of the pores, the higher the water can rise above the water table (B) Below the water table, the pore water may be static (C) The hydrostatic pressure depends on the depth below the water level (D) None of these

Last Answer : Answer: Option D

Description : The electric field lines and equipotential lines : (A) are parallel to each other (B) are one and the same (C) cut each other orthogonally (D) can be inclined to each other at any angle

Last Answer : The electric field lines and equipotential lines : cut each other orthogonally

Description : Two dimensional stream function (A) Relates velocity and pressure (B) Is constant along a stream line (C) Is constant along an equipotential surface (D) None of these

Last Answer : (B) Is constant along a stream line

Description : What work is work done in moving a positive charge on an equipotential surface? -Do You Know?

Last Answer : answer:

Description : What work is work done in moving a positive charge on an equipotential surface?

Last Answer : Zero

Description : Define permeability and Phreatic Line

Last Answer : Permeability  “It is defined as the properly of soli which permits the seepage of fluid through interconnecting voids under gravity  Phreatic Line: The topmost seepage line in an earthen dam at which hydrostatic pressure is zero, is called as Phreatic line.

Description : The hydrostatic pressure generated within the cell against cell wall as a result of entry of water into it, due to osmosis.

Last Answer : Ans. Turgor pressure

Description : An equipotential line is __________ to the velocity vector at every point. (A) Normal (B) Parallel (C) Tangential (D) None of these

Last Answer : (A) Normal

Description : The line traced by a single fluid particle as it moves over a period of time is called __________ line. (A) Stream (B) Path (C) Equipotential (D) None of these

Last Answer : (B) Path

Description : The concavity produced on the beam section about the centre line when downward force acts on it is called as (a) Hogging or positive bending moment (b) Hogging or negative bending moment (c) Sagging or positive bending moment (d) Sagging or negative bending moment

Last Answer : (b) Hogging or negative bending moment

Description : A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is (A) 9,000 kg (B) 13,500 kg (C) 18,000 kg (D) 27,000 kg

Last Answer : Answer: Option B

Description : The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called (A) Working pressure (B) Design pressure (C) Test pressure (D) Hydrostatic pressure

Last Answer : (C) Test pressure

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

Description : The pressure that builds up in pore water due to load increment on the soil, is termed (A) Excess pore pressure (B) Excess hydrostatic pressure (C) Hydrodynamic pressure (D) All the above

Last Answer : Answer: Option D

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

Description : Choose the wrong statement (A) The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface (B) The horizontal component ... above the area (D) The vertical component passes through the center of pressure of the volume

Last Answer : Answer: Option D

Description : Due to the impact of water wave on a sea shore structure (A) Hydrostatic pressure coupled with a strong momentary impact is caused (B) Vibrations are subjected (C) Internal pressure is developed (D) All of the above

Last Answer : (D) All of the above

Description : Consider the following statements: 1. Mathematically speaking, the time taken for 100% consolidation is infinite. 2. The time factor for a particular average degree of consolidation depends upon the distribution of initial excess hydrostatic ... 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only

Last Answer : (b) 1 & 2 only

Description : A counter may be defined as an imaginary line passing through (a) Points on the longitudinal section (b) Points of equal elevation (c) Point of equal local ground slope (d) Points of transverse section surveys

Last Answer : (b) Points of equal elevation

Description : Pick up the correct definition from the following with response to GIS. (A) Common boundary between two areas of a locality is known as adjacency (B) The area features which are wholly ... property which describes the linkage between line features is defined as connectivity (D) All of these

Last Answer : Answer: Option D

Description : When the reservoir is full, the maximum compressive force in a gravity dam is produced (A) At the toe (B) At the heel (C) Within the middle third of base (D) At centre of base

Last Answer : Answer: Option A

Description : Risk in project management is defined as  A.An uncertain event that, if it occurs, has a positive effect on project objectives  B.An uncertain event that, if it occurs, has a negative ... effect on project  objectives  D.An uncertain event that do not have any effect on project objectives

Last Answer : C.An uncertain event that, if it occurs, has a positive or negative effect on project  objectives

Description : What happens to the internal energy of water at reference temperature where enthalpy is zero?  a. Becomes negative  b. Becomes positive  c. Remains constant  d. Cannot be defined

Last Answer : Becomes negative

Description : The lowest outlet sluice in a dam is provided (A) Below the dead storage (B) On the top level of dead storage (C) On the top level of useful storage (D) At the centre of the dam

Last Answer : (B) On the top level of dead storage

Description : Pick up the correct statement from the following (A) The contour lines having the same elevation cannot unite and continue as one line (B) A contour can not end abruptly, but must ultimately close itself not ... slope at a point on a contour is at right angles to the contour (D) All the above

Last Answer : (D) All the above

Description : The work done in moving a test charge from one point to another in an equipotential surface is zero. State True/False. a) True b) Fals

Last Answer : a) True

Description : Equipotential surface is a a) Real surface b) Complex surface c) Imaginary surface d) Not existing surface

Last Answer : c) Imaginary surface

Last Answer : At an equipotential surface, the electric field is Always perpendicular to the surface.

Description : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal

Last Answer : C. ground

Description : Raft foundations are used for: (A) Providing increased area of foundation over poor bearing capacity of soil (B) Spanning over small soft or loose pockets (C) Counter acting the hydrostatic effect (D) All the above

Last Answer : Answer: Option D

Description : Positive pregnancy test, followed by two negative tests (all within 24 hours of each other)

Last Answer : Time for a third opinion.

Description : An open occurring within the field rheostat of an AC generator can be detected by short circuiting its terminals and observing a ____________. A. negative deflection of the wattmeter pointer B. ... of the wattmeter pointer C. buildup of alternator voltage D. low, but constant alternator voltage

Last Answer : Answer: C

Description : Which of the following statements is true A. Positive stress is short-term B. Negative stress can be short or long-term C. Negative stress can lead to mental as well as physical problems D. Negative stress is perceived within our coping abilities

Last Answer : D. Negative stress is perceived within our coping abilities

Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus 

Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE

Description : In a depressed nappe (A) The pressure below the nappe is atmospheric (B) The pressure below the nappe is negative (C) The pressure above the nappe is atmospheric (D) The pressure above the nappe is negative

Last Answer : Answer: Option B

Description : In a free nappe, (A) The pressure below the nappe is atmospheric (B) The pressure below the nappe is negative (C) The pressure above the nappe is atmospheric (D) The pressure above the nappe is negative

Last Answer : Answer: Option A

Description : Absorption factor method is used to calculate the number of ideal stages, when (A) Operating line lies above the equilibrium line (B) Operating line lies below the equilibrium line (C) Both operating and equilibrium lines are parallel (D) Pressure drop in the column is very high

Last Answer : (C) Both operating and equilibrium lines are parallel

Description : I would need the correct answers to these examples: 1, What pressure is under the heels of women's pumps? The area of one heel is 1cm2. When calculating, assume that a woman in pumps weighs 60 ... vessels is h = 20 cm. Determine the magnitude of the hydrostatic pressure at the bottom of vessel B.

Last Answer : Need Answer

Description : The hydrostatic pressure developed due to the accumulation of water absorb by the root is called root pressure.

Last Answer : Ans. Root pressure

Description : Which of the following statement(s) is/are true concerning water movement across cell membranes? a. Water moves only actively through cell membrane transport proteins b. For most cells of ... cells such as the glomerulus of the kidney actively transport water to maintain hydrostatic pressure

Last Answer : Answer: b, c The energetics of water transport across cell membranes is simplified by the fact that water moves only passively due to gradients of hydrostatic pressure or water ... water is distributed at equilibrium. Water distribution is determined entirely by solute to solute distribution

Description : Assertion (A): Hydrostatic lubrication is more advantageous when compared to hydrodynamic lubrication during starting and stopping the journal in its bearing. Reason (R): In hydrodynamic lubrication, the fluid film pressure is ... (c) A is true but R is false (d) A is false but R is true

Last Answer : (b) Both A and R are individually true but R is not the correct explanation of A