important question of fluid mechanices for psu
Q.1 A
fluid is said to be Newtonian fluid when the shear stress is
a) directly proportional to velocity
gradient b) inversely proportional to velocity
gradient
c) independent of the velocity gradient d)
none of these
Q.2 The
dimension of viscosity
a) M L T b) M L T c) M L T d) M L T
Q.3
For the stability of a floating body under the influence of gravity
alone which of the following
is true for Metacentre
a) below C.G
b) above C.G c) lie on the same
horizontal plane of C.G d) None of
these
Q.4
Existence of velocity potential implies
a) Fluid is ideal b) fluid is irrotational c) fluid is compressible d) None of these
Q.5
Pitot tube is used to measure
a) Discharge b) velocity c) a and b d) None of these
Q.6 Write down the principal of Bernoulli and continuity equation
……………………………………………………………………………………………………………………………………………………………………………………………………
Q.7 Write down the variation of visocity
of liquid and gases with temp
…………………………….........................................................................................................…………………………………………………………………………………………………
Q.8 Flow separation in flow past a solid
object is caused by
a) dp/dx <0 b) dp/dx
>o c) dv/dx<0 d) all of these
Q.9
For a static fluid the Mohr
circle
a)
becomes a point b) tensile in
nature c ) compressive in nature d) a
&c
Q.10 Maximum velocity of a one
dimensional incompressible fully developed viscous flow between two fixed
parallel plates is 6 m/s. The mean velocity of floe in m/s is
a) 2 b)3 c)4 d)5
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