Hydraulics And Fluid Mechanics Mcqs
Q.1: Choose the wrong statement________________?+
A. Viscosity of a fluid is that property which determines the amount of its resistance to a shearing forceg
B. Viscosity is due primarily to interaction between fluid moleculesA
C. Viscosity of liquids decreases with in-crease in temperature<
D. Viscosity of liquids is appreciably affected by change in pressureB
Q.2: Choose the wrong statement?
A. fluids are capable of flowing
B. fluids conform to the shape of the con-taining vessels6
C. when in equilibrium, fluids cannot sustain tangential forces<
D. when in equilibrium, fluids can sustain shear forces4
Q.3: Choose the wrong statement?
A. any weight, floating or immersed in a liquid, is acted upon by a buoyant forceN
B. Buoyant force is equal to the weight of the liquid displaced<
C. The point through which buoyant force acts, is called the center of buoyancyL
D. Center of buoyancy is located above the center of gravity of the displaced liquid vS
Q.4: Choose the wrong statement ?
A. The center of buoyancy is located at the center of gravity of the displaced liquidR
B. For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancyo
C. If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positionsm
D. For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancyf
Q.5: Select the correct statement ?
A. Local atmospheric pressure depends upon elevation of locality onlyB
B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea levelQ
C. Local atmospheric pressure is always below standard atmospheric pressureH
D. A barometer reads the difference be-tween local and standard atmospheric pressureQ
Q.6: In a forced vortex, the velocity of flow everywhere within the fluid is__________________?Z
A. maximum
B. minimum
C. zero
D. non-zero finite
Q.7: Two pipe systems can be said to be equivalent, when the following quantites are same______________?c
A. friction loss and flow
B. length and diameter
C. flow and length
D. friction factor and diameter
Q.8: At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?
A. minimum
B. maximum
C. zero
D. negative value
Q.9: For pipes, laminar flow occurs when Roynolds number is__________________?I
A. less than 2000
B. between 2000 and 4000
C. more than 4000
D. less than 4000
Q.10: The fluid forces considered in the Navier Stokes equation are__________________?P
A. gravity, pressure and viscous
B. gravity, pressure and turbulent
C. pressure, viscous and turbulent
D. gravity, viscous and turbulent

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