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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