Fluid Mechanics Questions

• If the discharge of a centrifugal pump is throttled, then its suction lift
• Most commonly used joint in the underground pipe lines is the
• Co-efficient of velocity is __________ the coefficient of discharge.
• Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum
• The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s).
• The velocity profile for turbulent flow through a closed conduit is
• The pitot static tube does not measure the __________ pressure.
• The resistance wire used in a hot wire anemometer for conducting electrical current is made of
• What is the normal range of exit cone angle of a venturimeter?
• Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft.
• When the momentum of one fluid is used for moving another fluid, such a device is called a/an
• A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
• The normal stress is the same in all directions at a point in a fluid, when the fluid is
• The maximum delivery pressure of compressors can be upto __________ atmospheres.
• Molten soap mass is transported by a __________ pump.
• For the transfer of solution of thick slurry, the pump used is a __________ pump.
• The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the
• __________ pumps are axial flow pumps.
• A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is
• Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.