Q.1

Back water curve is caused if

  • friction head loss is more than the bed slope
  • pressure is due to weir in the channel
  • there is an increase in width of the channel
  • none of these.
Q.2

The unit of the viscosity is

  • kg sec/m2
  • Newton sec per m2
  • Newton-sec2/m3
  • m2 per sec.
Q.3

The value of momentum correction factor (β) for a laminar flow through a circular pipe, is

  • 1/2
  • 2/3
  • 3/4
  • 4/3
  • 3/2
Q.4

In C.G.S. system the unit of visocity is

  • dyne
  • joule
  • poise
  • Newton
  • none of these.
Q.5

A spherical loadkg is rolled through 9.8 m across the deck of a ship weighingkg. If the metacentric height of the ship is 5 metres, the angle of heel, is

  • 10° 5'
  • 10° 10'
  • 10° 15'
  • 10° 20'
Q.6

An orifice is an opening in a vessel with

  • closed perimeter of regular shape through which water flows
  • the water level of the liquid on the up stream side is below the top of the orifice
  • partially full flow
  • prolonged sides having length of 2 to 3 diameters of the opening in thick wall.
Q.7

The value of momentum correction factor (β) for a laminar flow through a circular pipe, is

  • 1/2
  • 2/3
  • 3/4
  • 4/3
  • 3/2
Q.8

A spherical loadkg is rolled through 9.8 m across the deck of a ship weighingkg. If the metacentric height of the ship is 5 metres, the angle of heel, is

  • 10° 5'
  • 10° 10'
  • 10° 15'
  • 10° 20'
Q.9

Kinematic viscosity of liquids by equation is determined by :

  • Redwood viscometer
  • Engler viscometer
  • Saybolt universal viscometer
  • None of these.
Q.10

The ratio of the inertia and viscous forces acting in any flow, ignoring other forces, is called

  • Euler number
  • Frode number
  • Reynold number
  • Weber number.
Q.11

In C.G.S. system the units of kinematic viscosity, is

  • stoke
  • poise
  • Newton
  • none of these.
Q.12

On an inclined plane, centre of pressure is located

  • at the centroid
  • above the centroid
  • below the centroid
  • anywhere.
Q.13

An error ofin measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to

  • 1.25%
  • 1.5%
  • 2.0%.
  • 2.5%
Q.14

Power transmitted through a pipe is maximum when friction head loss, is

  • one-half of the total head supplied
  • one-third of the total head supplied
  • one-fouth of the total head supplied
  • equal to the total head supplied.
Q.15

Manometers are used to measure

  • pressure in water channels, pipes etc.
  • difference in pressure at two points
  • atmospheric pressure
  • very low pressure.
Q.16

The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is

  • 1/2
  • 2/3
  • 3/2
  • 3/4
Q.17

Pick up the correct statement from the following :

  • In incompressible flow the density of a fluid remains constant
  • In compressible flow, the density of a fluid changes from point to point
  • In uniform flow, the velocity of a fluid does not change with respect to length of flow direction
  • All the above.
Q.18

An error ofin measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to

  • 1.25%
  • 1.5%
  • 2.0%.
  • 2.5%
Q.19

The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called

  • path line
  • stream line
  • potential line
  • streak line.
Q.20

A triangular notch is preferred to a rectangular notch because

  • only one reading is required
  • its formula is simple to remember
  • it gives more accurate results for low discharge
  • it measures a wide range of flows accurately
  • all the above.
Q.21

Pick up the incorrect statement from the following :

  • In radial flow, fluid flows such that pressure and velocity at any point change with respect to its distance from the central axis
  • In radial flow, velocity of flow is in a radial direction
  • In radial flow, flow may take place radially inward to or outward from the centre
  • In radial flow, flow is one dimensional with stream lines parallel.
Q.22

In case of laminar flow through a circular pipe,

  • momentum correction factor is 1.33
  • energy correction factor is 2.00
  • both (a) and (b)
  • Neither (a) nor (b).
Q.23

If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m3/sec, the velocity of approach Vd is

  • 2gH
    152-7.141-1.png
    152-7.141-2.png
    152-7.141-3.png
  • none of these.
Q.24

Mercury is generally used in barometers because

  • its vaour pressure is practically zero
  • the height of the barometer will be less
  • it is a best liquid
  • both (a) and (b) above
  • both (b) and (c) above.
Q.25

Pick up the incorrect statement from the following :

  • In radial flow, fluid flows such that pressure and velocity at any point change with respect to its distance from the central axis
  • In radial flow, velocity of flow is in a radial direction
  • In radial flow, flow may take place radially inward to or outward from the centre
  • In radial flow, flow is one dimensional with stream lines parallel.
Q.26

If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m3/sec, the velocity of approach Vd is

  • 2gH
    152-7.141-1.png
    152-7.141-2.png
    152-7.141-3.png
  • none of these.
Q.27

In flowing liquids pitot tubes are used measure

  • discharge
  • pressure
  • velocity
  • depth.
Q.28

Capillary rise of water is

  • directly proportional to surface tension
  • inversely proportional to water density
  • inversely proportional to diameter of the tube
  • All of these.
Q.29

A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water

  • rises on the front side of the tank
  • falls on the back side of the tank
  • remains the same at both sides of the tank
  • rises on the back side and falls on the front side
  • none of these.
Q.30

The dimensional formula of force is

  • MLT-2
  • M-1LT2
  • ML-2T
  • M-1L2T-2
  • none of these.
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