Description : 20. The hydraulic gradient line is always parallel to the centre line of the pipe. A) Correct B) Incorrect
Last Answer : B
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
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
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
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
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
Description : 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
Last Answer : Answer: Option D
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
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
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
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
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
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
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
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 : 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 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
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
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
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
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.
Description : Deviation of the actual road gradient from the proposed contour gradient uphill side, involves (A) Embankment on the centre line (B) Excavation on the centre line (C) Earth work on the centre line (D) None of these
Last Answer : (B) Excavation on the centre line
Description : A portion of an embankment having a uniform up-gradient 1 in 500 is circular with radius 1000 m of the centre line. It subtends 180° at the centre. If the height of the bank is 1 m at the lower end, and side slopes 2 ... earth work involved. (A) 26,000 m3 (B) 26,500 m3 (C) 27,000 m3 (D) 27,500 m
Last Answer : (D) 27,500 m3
Description : The cross-sections for a highway is taken at (A) Right angle to the centre line (B) 30 metres apart (C) Intermediate points having abrupt change in gradient (D) All the above
Description : The hydraulic mean depth for a circular pipe of diameter (d) is (A) d/6 (B) d/4 (C) d/2 (D) d
Description : The hydraulic mean depth or the hydraulic radius is the ratio of (A) Area of flow and wetted perimeter (B) Wetted perimeter and diameter of pipe (C) Velocity of flow and area of flow (D) None of these
Description : The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended (A) 100 mm (B) 150 mm (C) 200 mm (D) 175 mm
Last Answer : (B) 150 mm
Description : Hydraulic mean radius is A. Mean radius of sewer B. Difference in heads between two points in circular pipes C. Mean of radii in a pipe line of varying cross -sections D. Cross-sectional area/wetted perimeter
Description : The total energy line lies over the centre line of the pipe by an amount equal to (A) Pressure head (B) Velocity head (C) Pressure head + velocity head (D) Pressure head - velocity head
Description : 07. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced. A) True B) False
Last Answer : A
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
Description : The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to (A) The distance between the zero of ... Thrice the distance between the zero of graduation and the foot of the staff (D) None of the above
Last Answer : (B) Twice the distance between the zero of graduation and the foot of the staff
Description : 03. If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections. A) True B) False
Description : 05. The flow in a pipe is laminar, when Reynold number is less than 2000. A) True B) False
Description : Hydraulic intensifier is used for increasing the (A) Rate of velocity of liquid supply (B) Rate of flow through delivery pipeline of a pump (C) Intensity of pressure of the liquid (D) Momentum rate through delivery pipe
Last Answer : (C) Intensity of pressure of the liquid
Description : Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum (A) Flow rate (B) Mean velocity (C) Both 'a' & 'b' (D) Neither 'a' nor 'b
Last Answer : (B) Mean velocity
Description : In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said ... co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)
Last Answer : (C) Friction co-efficient for flows at equal Reynold number
Description : When a liquid is flowing through a pipe, the velocity of the liquid is (A) Maximum at the centre and minimum near the walls (B) Minimum at the centre and maximum near the walls (C) Zero at the centre and maximum near the walls (D) Maximum at the centre and zero near the walls
Description : Nusselt number is the ratio of the temperature gradient at the wall to (A) Temperature difference (B) Heat flux (C) That across the entire pipe (D) None of these
Last Answer : (C) That across the entire pipe
Description : The non-dimensional temperature gradient in a liquid at the wall of a pipe is the (A) Heat flux (B) Nusselt number (C) Prandtl number (D) Schmidt number
Last Answer : (A) Heat flux
Description : Nusselt number is the ratio of the (A) Temperature gradient of the wall to that across the entire pipe (B) Temperature difference to the temperature gradient at the wall (C) Heat flux at the wall to that across the entire pipe (D) None of these
Last Answer : (C) Heat flux at the wall to that across the entire pipe
Description : Pressure gradient in the pipe flow is influenced by the (A) Diameter of pipe (B) Velocity of the fluid (C) Density & viscosity of the fluid (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : In a fully turbulent flow (Re > 10 5 ) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is (A) d (B) d 2 (C) d 2.5 (D) d
Last Answer : (C) d 2.5
Description : For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of (A) 2 (B) < 2 (C) > 2 (D) 1/2
Last Answer : (A) 2
Description : A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to (A) 10 kg (B) 100 kg (C) 1000 kg (D) 1 kg
Description : For laminar flow of Newtonian fluid in a circular pipe, the velocitydistribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship. (A) Logarithmic (B) Parabolic (C) Hyperbolic (D) Linear
Last Answer : (B) Parabolic
Description : On the recommendations of Indian Road Congress, the ruling gradient in plains, is (A) 1 in 15 (B) 1 in 20 (C) 1 in 30 (D) 1 in 45
Description : Reduction of load capacity in a ruling gradient of (A) 1 in 10, is 10% (B) 1 in 15, is 15% (C) 1 in 20, is 10% (D) 1 in 25, is 25%
Description : The best compromise between the increase of the length of a highway and reduction in its load carrying capacity, is the ruling gradient (A) 1 in 10 (B) 1 in 15 (C) 1 in 20 (D) 1 in 25
Description : The reduced levels of points, 30 metres apart along the longitudinal section of a road portion between chainages 5 and 9 are shown in the given figure. If there is a uniform up-gradient of the road 120 in 1, the chainage ... 15) chains (B) (6 + 12) chains (C) (6 + 18) chains (D) None of these
Last Answer : (B) (6 + 12) chains