Q.1

Pick up the correct statement from the following :

  • When the length of the tube is equal to diameter of the internal mouth piece, the jet of liquid comes out without touching the sides of the tube
  • When the length of the tube is three times the diameter of the internal mouth piece, the jet diameter is equal to diameter of the tube.
  • both (a) and (b)
  • Neither (a) nor (b).
Q.2

Shear stress is directly proportional to

  • the velocity
  • the shear strain
  • the viscosity
  • the velocity.
Q.3

A stepped notch is a combination of

  • rectangular notches of different sizes
  • triangular notches of different sizes
  • rectangular and triangular notches
  • all the above.
Q.4

Centre of buoyancy is

  • centroid of the floating body
  • centroid of the fluid displaced
  • centre of pressure of the displaced liquid
  • none of these.
Q.5

In a short cylindercial external mouthpiece, the venacontracta occurs at a distance from the outlet of orifice equal to

  • diameter of the orifice
  • one-fourth the diameter of the orifice
  • one-third the diameter of the orifice
  • two-third the diameter of the orifice
Q.6

A non-uniform steady flow is through

  • a long tube at a decreasing rate
  • an expanding tube at constant rate
  • an expanding tube at increasing rate
  • a long pipe at increasing rate.
Q.7

The notch angle for maximum discharge over a triangular notch, is

  • 30°
  • 60°
  • 90°
  • 120°
Q.8

If total head available at the inlet of pipe and f1 is the loss of head due to friction in the pipe, the maximum efficiency of transmission of power (ηmax) is

  • 1/2
  • 2/3
  • 3/4
  • 4/5
Q.9

To avoid an interruption in the flow of a syphon, an air vessel is provided

  • at the inlet
  • at the outlet
  • at the summit
  • at any point between intet and outlet.
Q.10

The centre of pressure of a vertical plane immersed in a liquid is at

  • centre of higher edge
  • centre of lower edge
  • centroid of the area
  • none of these.
Q.11

The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity v, is directly proportional to :

  • square root of the bulk modulus of elasticity of water
  • bulk modulus of elasticity of water
  • specific weight of water
  • none of these.
Q.12

The dimensionless parameter not applicable to flowing liquids, is

  • Reynold number
  • Weber number
  • Pressure coefficient
  • Kinematic viscosity
  • Friction factor.
Q.13

If the pressure at the inlet of a pipe iskg/cm2 and pressure drop over the pipe line iskg/cm2, the efficiency of transmission, is

  • 66.6%
  • 77.7%
  • 55.5%
  • 88.8%.
Q.14

An open container filled with water is moved vertically upward with a uniform linear acceleration. The pressure at its bottom will be

  • greater than static pressure
  • equal to static pressure
  • lesser than static pressure
  • none of these.
Q.15

An ideal fluid is

  • incompressible
  • compressible
  • compressible and non-viscous
  • slightly affected by surface torque.
Q.16

In an inclined pipe, the pressure difference at its two ends is due to

  • sudden head drop at inlet
  • exit head drop
  • frictional loss head
  • elevation head
  • all the above.
Q.17

Piezometers are used to measure

  • pressure in water channels, pipes etc.
  • difference in pressure at two points
  • atmospheric pressure
  • very low pressure.
Q.18

Pick up the correct statement from the following :

  • Total energy gradient is the graphical representation of the total head at any section of a pipe line
  • Vertical distance between the total energy line and hydraulic grade line is equal to the velocity head
  • Vertical distance between the total energy line and total energy gradient represents loss of head
  • all the above.
Q.19

For a most economical rectangular channel, the width of the channel must be

  • equal to depth of flow
  • twice the depth of flow
  • half the depth of flow
  • None of these.
Q.20

A nozzle is fitted at the end of a pipe whose length ism and diameter iscm. If the value of f = 0.the diameter of the nozzle for the maximum transmission of power through the nozzle is

  • 2.4 cm
  • 2.5 cm
  • 2.6 cm
  • 2.7 cm.
Q.21

An open container filled with water is moved vertically downward with a uniform linear acceleration. The pressure at its bottom will be

  • greater than static pressure
  • equal to static pressure
  • lesser than static pressure
  • none of these.
Q.22

Pick up the correct statement from the following :

  • Total energy gradient is the graphical representation of the total head at any section of a pipe line
  • Vertical distance between the total energy line and hydraulic grade line is equal to the velocity head
  • Vertical distance between the total energy line and total energy gradient represents loss of head
  • all the above.
Q.23

Chezy's formula is used to determine

  • head loss due to friction in pipe
  • velocity of flow in pipe
  • velocity of flow in open channels
  • none of these.
Q.24

The pressure rise due to water hammer depends upon

  • the velocity of flow of water in the pipe
  • the length of pipe
  • time taken to close the valve
  • the elasticity of the pipe material
  • All of above.
Q.25

Pick up the incorrect statement from to following regarding triangular notch :

  • For measuring low discharge, it gives more accurate result
  • Only one reading (i.e. H) is required for computation of discharge
  • Ventilation is necessary
  • None of these.
Q.26

The gases are considered incompressible if Match number is

  • equal to 1.0
  • equal to 1.5
  • is more than 0.5
  • less than 0.2
Q.27

Weber number is the ratio of inertia force to

  • surface tension
  • gravitational force
  • elasticity
  • viscosity.
Q.28

A body of dimensions 1.5 m x 1.0 m x 2 m weighskg in water. Its specific gravity is

  • 0.8
  • 0.9
  • 1.0
  • 1.1
Q.29

When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as

  • free vortex
  • forced vortex
  • non-potential vortex
  • rotational vortex.
Q.30

For uniform flow in canals

  • there is a balance between the frictional loss and drop in elevation of the channel
  • bed and free water surfaces of a channel are parallel to each other
  • bed of channel represents the hydraulic gradient
  • all the above.
0 h : 0 m : 1 s