Top 350+ Solved Hydraulics and Fluid Mechanics MCQ Questions Answer
Q. The height of a water column equivalent to a pressure of 0.15 MPa is
a. 15.3 m
b. 25.3 m
c. 35.3 m
d. 45.3 m
Q. The region between the separation streamline and the boundary surface of the solid body isknown as
a. Wake
b. Drag
c. Lift
d. Boundary layer
Q. Froude number is significant in
a. Supersonics, as with projectile and jet propulsion
b. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
c. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls
d. All of the above
Q. The ratio of specific weight of a liquid to the specific weight of pure water at a standardtemperature is called
a. Density of liquid
b. Specific gravity of liquid
c. Compressibility of liquid
d. Surface tension of liquid
Q. The total head of a liquid particle in motion is equal to
a. Pressure head + kinetic head + potential head
b. Pressure head - (kinetic head + potential head)
c. Potential head - (pressure head + kinetic head)
d. Kinetic head - (pressure head + potential head)
Q. Free surface of a liquid tends to contract to the smallest possible area due to force of
a. Surface tension
b. Viscosity
c. Friction
d. Cohesion
Q. The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select thecorrect statement.
a. The bodies A and B have equal stability
b. The body A is more stable than body B
c. The body B is more stable than body A
d. The bodies A and B are unstable
Q. The rise or depression of liquid in a tube due to surface tension will increase in size of tube will
a. Increase
b. Remain unaffected
c. May increase or decrease depending on the characteristics of liquid
d. Decrease
Q. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.
a. Less than
b. More than
c. Equal to
d. None of these
Q. The line of action of the buoyant force acts through the Centroid of the
a. Submerged body
b. Volume of the floating body
c. Volume of the fluid vertically above the body
d. Displaced volume of the fluid
Q. The intensity of pressure at any point, in a liquid, is
a. Directly proportional to the area of the vessel containing liquid
b. Directly proportional to the depth of liquid from the surface
c. Directly proportional to the length of the vessel containing liquid
d. Inversely proportional to the depth of liquid from the surface
Q. During the opening of a valve in a pipe line, the flow is
a. Steady
b. Unsteady
c. Uniform
d. Laminar
Q. A manometer is used to measure
a. Atmospheric pressure
b. Pressure in pipes and channels
c. Pressure in Venturimeter
d. Difference of pressures between two points in a pipe