Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The value of bulk modulus of elasticity .......... with increase of pressure.
a. Increases
b. Decreases
c. Either of the above
d. None of the above.
Q. The pressure of a liquid on a surface will always act ...... to the surface.
a. Parallel
b. Normal
c. 45°
d. 60°.
Q. The pressure ....... as the depth of the liquid increases.
a. Increases
b. Decreases
c. Remain unchanged
d. None of the above.
Q. The intensity of pressure in a liquid due to its depth will vary .... with depth.
a. Directly
b. Indirectly
c. Either of the above
d. None of the above.
Q. The height of the free surface above any point is known as
a. Static head
b. Intensity of pressure
c. Either of the above
d. None of the above.
Q. “The intensity of pressure at any point in a liquid at rest is the same in all directions.” The above statementis known as
a. Kirchhoff’s law
b. Pascal’s law
c. Either of the above
d. None of the above.
Q. Any pressure measured above the absolute zero of pressure is termed as
a. Atmospheric pressure
b. Gauge pressure
c. Either of the above
d. None of the above
Q. The fundamental S.I. unit of pressure is N/m2; this is also known as ......
a. Pascal
b. Stoke
c. Poise
d. None of the above
Q. When a fluid flows through a tapering pipe at a constantly increasing rate, the flow is said to
a. Irrotational flow
b. Unsteady uniform flow
c. Unsteady flow
d. Turbulent flow
e. Unsteady non-uniform flow
Q. The boundary condition for steady flow of an ideal fluid is that the
a. Continuity equation must be satisfied
b. Boundary surface must be stationary
c. Velocity component tangent to the boundary is zero
d. Velocity is zero at the boundary
e. Velocity component normal to the boundary is zero
Q. 1 atm pressure is equivalent to
a. 1.01315 x 105 N/m2
b. 700 mm Hg
c. 1.0133 x 105 kg/m-sec2
d. 1.0133 x 106 kg/cm-sec2
e. Any of the above
Q. In order to avoid a correction for the effect of capillarity in manometers, the diameter of the tube should be
a. Less than 1 mm
b. Less than 3 mm
c. Less than 4.5 mm
d. Greater than or equal to 6 mm
e. None of the above
Q. 1 lb/in2 pressure is equivalent to
a. 144 lb/ft2
b. 6.8046 x 10-2
c. 6.8947 x 103 kg/m-sec2
d. 0.06895 bar
e. Any of the above
Q. If the pressure at any point in the liquid approaches the vapour pressure, the liquid starts vapourising and creates pockets or bubbles of dissolved gases and vapours. This phenomenon is known as
a. adhesion
b. surface tension
c. vaporisation
d. cavitation
Q. The pressure in metres of oil (specific gravity 0.85) equivalent to 42.5 m of water is
a. 100 m
b. 52.5 m
c. 85 m
d. 42.5 m
e. 50 m