Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The friction factor in turbulent flow in smooth pipes depends upon the following
a. (L, D, ?, ?,
b. V, D, ?, L,
c. V, D,
d. L,
e. L, D, Q, V.
Q. Layered or bedded rocks having planes of reltively easy separation are called
a. Swelling rocks
b. Stratified rocks
c. Schistos rocks
d. Squeezing rocks
e. Seamy rocks
Q. Concentrated solution of sugar is a
a. Dilatant fluid
b. Pseudo plastic fluid
c. Newtonian fluid
d. Ideal fluid
e. None of the above
Q. 1 N/m2 pressure is equivalent to
a. 1 pascal
b. 10-5 bar
c. 10-2 kg/m sec2
d. 7.5 x 10-3 mm Hg
e. Any of the above
Q. For a laminar flow through a pipe the shear stress over a cross-section
a. Varies inversely as the distance from the centre of the pipe
b. Varies directly as the distance from the surface of pipe
c. Greater than ten
d. Varies directly as the distance from the centre of the pipe
e. Remains canstant over the cross-section
Q. If the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, the flow is said to be
a. Uniform flow
b. Steady flow
c. Turbulent flow
d. Laminar flow
e. None of the above
Q. Which one of the following method is used to check the stability of gravity dams
a. Pigeaud's method
b. Finite element method
c. Slab analogy method
d. Lattice analogy method
e. All of the above
Q. A Rankine body can be developed when a source of constant discharge is placed at the origin and in a
a. non-uniform flow
c. uniform flow
d. vortex flow
e. gradually varying flow
Q. In a channel the flow at critical depth occurs when
a. Any changes in depth require more specific energy
b. Hydraulic gradient and slope coincide
c. Specific energy is a maximum for a given discharge
d. Normal depth and critical depth coincide for a channel
e. Vitrified clay.
Q. The vertical component of pressure force on a submerged curved surface is equal to
a. Its horizontal component
b. The force on a vertical projection of the curved surface
c. The product of pressure at centroid and surface area
d. The weight of liquid vertically above the curved surface
e. None of the above
Q. If the forces due to inertia, gravity and frictional resistance are insignificant, the design of a channel may be made by comparing
a. Prandt number
c. Reynolds number
d. Weber number
e. Froude's number
Q. The velocity distribution for flow between two fixed parallel plates
a. Is constant over the cross-section
b. Varies parabolically across the section
c. Is zero at the plates and linearly increases towards the plates
d. Is zero in the middle and increases linearly towards the plates
e. None of the above
Q. The most economical section of a triangular channel is
a. An isosceles triangles with vertex angle of 60?
b. A right angled triangle
c. An equilateral triangle
d. An isosceles triangle with vertex angle of 90?
e. An isosceles triangle with vertex angle of 45?
Q. Runway speed of a Pelton wheel is
a. No lead speed
b. Actual operating speed
c. 90% greater than normal speed
d. No load speed when governor mechanism fails
e. Full load speed
Q. The pressure in millimetres of mercury gauge, equivalent to 68 mm H2O plus 54.4 mm manometer fluid, sp. Gr. 2.5 is
a. 20
b. 17.5
c. 12.5
d. 10
e. 15.5