Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. Geometric similarity between model and prototype means
a. The similarity of linear dimensions
b. The similarity of motion
c. The similarity of forces
d. Vitrified clay.
e. The similarity of discharge
Q. The Reyonlds number may be defined as the ratio of
a. Viscous forces to inertial forces
b. Elastic forces to pressure forces
c. Viscous forces to gravity forces
d. Gravity forces to inertial forces
e. None of the above
Q. The maximum velocity through a circular channel takes place when the depth of flow is equal to
a. 0.95 times the diameter
b. 0.25 times the diameter
c. 0.50 times the diameter
d. 0.37 times the diameter
e. 0.81 times the diameter
Q. In a flow between two stationary parallel plates the shear stress is zero at
a. the top
b. at the centre where velocity is maximum
c. both at the base and at the top
d. the base
Q. The head loss in turbulent flow in a pipe
a. Varies approximately as square of velocity
b. Varies conversely as square of velocity
c. Varies directly as velocity
d. Varies conversely with diameter
e. Varies inversely with diameter
Q. A most economical channel section is one which for a given cross-section area
a. Has maximum depth of fluid flowing
b. Has maximum discharge
c. Has maximum hydraulic radius
d. Has maximum wetted perimeter
e. Has maximum velocity of fluid
Q. Navier-stokes equation is useful in the analysis of
a. Viscous flow
b. Non-viscous flow
c. Rotational flow
d. Turbulent flow
e. Any of the above
Q. Which one is different from the others?
a. Warped vane impeller
b. Shrouded impeller
c. Axial flow impeller
d. Mixed flow impeller
e. Open impeller
Q. The intensity of pressure p is related to specific weight w of the liquid and vertical depth h of the pointby the equation
a. p = wh
b. h = pw
c. p = wh2
d. p = wh3.
Q. The point of application of the total pressure on the surface is
a. Centroid of the surface
b. Centre of pressure
c. Either of the above
d. None of the above.
Q. The side of the dam to which the water from the river or the stream approaches is known as
a. Downstream
b. Upstream
c. Either of the above
d. None of the above.
Q. Lock gates are provided to
a. Change the water level in a canal or river for irrigation
b. Store water for irrigation purpose
c. Either of the above
d. None of the above.
Q. The term........ means the study of pressure exerted by a fluid at rest.
a. Hydrostatics
b. Fluid mechanics
c. Continuum
d. Kinetics
Q. The tendency for an immersed body to be lifted up in the fluid, due to an upward force opposite to theaction of gravity is known as
a. Buoyancy
b. Centre of buoyancy
c. Buoyant force
d. None of the above.