Q.1
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will
  • increase
  • decrease
  • remain same
  • increase/decrease depending on depth of immersion
Q.2
For a floating body to be in stable equilibrium, its metacentre should be
  • below the center of buoyancy
  • above the center of buoyancy
  • between e.g. and center of pressure
  • above the center of gravity.
Q.3
Ifkg liquid occupies volume of one cubic meter, men 0.represents its
  • specific weight
  • specific mass
  • specific gravity
  • specific density
Q.4
In a Sutro weir, the discharge is proportional to (where H is head)
  • H1/2
  • H3/2
  • H5/2
  • H
Q.5
True one-dimensional flow occurs when
  • the direction and magnitude of the veiocity at all points are identical
  • the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
  • the magnitude and direction of the velocity do not change from point to point in the fluid
  • the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
Q.6
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if
  • the area is horizontal
  • the area is vertical
  • the area is inclined
  • all of the above
Q.7
The units of viscosity are
  • metre2/sec
  • kg sec/metre
  • newton-sec/metre2
  • newton-sec/metre
Q.8
If a sphere of diameter 1 cm falls in castor oil of kinematic viscositystokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is
  • less than 1
  • between 1 and 100
  • 160
  • 200
Q.9
The Prartdtl mixing length is
  • zero at the pipe wall
  • maximum at the pipe wall
  • independent of shear stress
  • none of the above
Q.10
The discharge through a V- notch varies as
  • H1/2
  • H3’2
  • H5/2
  • H5’4 where H is head.
Q.11
Ay between two stream lines represents
  • velocity
  • discharge
  • head
  • pressure
Q.12
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called
  • surface tension
  • co-efficient of viscosity
  • viscosity
  • osmosis
Q.13
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than
  • 2.4 m above the hydraulic gradient
  • 6.4 m above the hydraulic gradient
  • 10.0 m above the hydraulic gradient
  • 5.0 above the hydraulic gradient
Q.14
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is
  • at the centroid of the submerged area
  • always above the centroid of the area
  • always below the centroid of the area
  • none of the above
Q.15
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)
  • steady flow
  • uniform flow
  • incompressible flow
  • frictionless flow
Q.16
According to Bernoulli’s equation for steady ideal fluid flow
  • principle of conservation of mass holds
  • velocity and pressure are inversely proportional
  • total energy is constant throughout
  • the energy is constant along a stream-line but may vary across streamlines
Q.17
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies
  • linearly with radial distance
  • as the square of the radial distance
  • inversely as the square of the radial distance
  • inversely as the radial distance
Q.18
The density of water iskg/m3 at
  • 0°C
  • 0°K
  • 4°C
  • 20°C
Q.19
Which of the following is demensionless
  • specific weight
  • specific volume
  • specific speed
  • specific gravity
Q.20
A large Roynold number is indication of
  • smooth and streamline flow
  • laminar flow
  • turbulent flow
  • highly turbulent flow.
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