Q.1

For solving network problems of pipes, necessary condition is

  • continuity equation
  • energy equation
  • Darcy-Weisbach equation
  • all the above.
Q.2

Orifice-meter is used to measure

  • pressure at the point
  • discharge
  • average speed
  • velocity.
Q.3

Hydraulic radius is equal to

  • area divided by the square of wetted perimeter
  • area divided by wetted perimeter
  • wetted perimeter divided by area
  • square root of the area.
Q.4

Flow in pipes is laminar if Reynold number is

  • less than 2100
  • more than 3000
  • between 2100 and 3000
  • none of these.
Q.5

When water flows over a rectangular suppressed weir, the negative pressure created beneath the nappe

  • increases the discharge
  • decreases the discharge
  • does not effect the discharge
  • none of these.
Q.6

Pick up the correct statement from the following :

  • Dimensional homogeneity means the dimensions of each term in an equation on both sides are equal
  • Dimensionally homogeneous equations are independent of the system of units
  • In dimensionally homogeneous equation, the powers of fundamental dimensions on either side of the equation are identical
  • All the above.
Q.7

To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is

  • 1/4 to 1/8
  • 1/3 to 1/2
  • 1/2 to 3/4.
  • none of these.
Q.8

The discharg formula Q = Cd 2gH x A is used for rectangular

  • small orifices only
  • large orifices only
  • small and large orifices only
  • for all types of orifices.
Q.9

If jet of water coming out from a nozzle with a velocity 9.m/s, the angle of elevation being 30°, the time to reach the highest point is

  • 0.25 s
  • 0.50 s
  • 1.0 s
  • 1.5 s.
Q.10

To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is

  • 1/4 to 1/8
  • 1/3 to 1/2
  • 1/2 to 3/4.
  • none of these.
Q.11

In a fluid flow a particle may posses

  • elevation energy
  • kinetic energy
  • pressure energy
  • initial energy
  • all the above.
Q.12

Barometres are used to measure

  • pressure in water channels, pipes etc.
  • difference in pressure at two points
  • atmospheric pressure
  • very low pressure
  • very high pressure.
Q.13

The ratio of inertia force of a flowing fluid and the viscous force of the liquid is called :

  • Renold's number
  • Froude's number
  • Euler's number
  • Weber's number.
Q.14

Atmospheric pressure varies with

  • altitude
  • temperature
  • weather conditions
  • all of the above.
Q.15

Discharge over an ogee weir remains the same as that of

  • sharp crested weir
  • triangular weir
  • cippoletti weir
  • drowned weir.
Q.16

From a nozzle exposed to atmosphere, the liquid jet traverses

  • a straight line
  • a circular path
  • an elliptical path
  • a parabolic path.
Q.17

The discharge through amm diameter external mouth piece fitted to the side of a large vessel is 0.m3/s. The head over the mouth piece is

  • 2 m
  • 2.5 m
  • 3.0 m
  • 4.0 m.
Q.18

In two dimensional flow the components of velocity are given by u = ax; v = by. The stream lines will be

  • circular
  • parabolic
  • hyperbolic
  • elliptical.
Q.19

In flow, the liquid particles may possess

  • potential energy
  • kinetic energy
  • pressure energy
  • all the above.
Q.20

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

  • one-fourth of the width
  • three times the hydraulic radius
  • half the width
  • hydraulic mean depth
  • none of these.
Q.21

The magnitude of water hammer in a pipe depends upon

  • speed at which value is closed
  • length of the pipe line
  • elastic properties of the pipe material
  • elastic properties of the following liquid
  • all the above.
Q.22

Dimensions of the dynamic viscosity (μ) are

  • MLT-2
  • M-1L-1T-1
  • ML-1T-2
  • ML-1T-1.
Q.23

When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as

  • free nappe
  • depressed nappe
  • clinging nappe
  • none of these.
Q.24

To avoid the force of surface tension in an inclined manometer, the minimum angle of inclination is

  • 2°
  • 3°
  • 4°
  • 5°
Q.25

The acceleration f required to accelerate a rectangular tank containing water horizontally so that the slope of its free surface is 45°, is

  • g/2
  • g
  • 2 g
  • 2.5 g
  • 3 g.
Q.26

If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass, the free level of fluid in a dipped glass tube will be

  • higher than the surface of liquid
  • same as the surface of liquid
  • lower than the surface of liquid
  • none of these.
Q.27

The discharge through a V-notch weir varies as

  • H
  • 1/H
  • H3/2
  • H7/2
  • H5/2.
Q.28

Euler's equation for the motion of liquids assumes that

  • fluid is viscous
  • fluid is homogeneous and incompressible
  • velocity of flow is non-uniform over the section
  • flow is unsteady along the stream line.
Q.29

In a centrifugual pump casing, the flow of water leaving the impeller, is

  • rectilinear flow
  • radial flow
  • free vortex motion
  • forced vertex.
Q.30

Water belongs to

  • Newtonian fluids
  • non-Newtonian fluids
  • compressible fluid
  • none of these.
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