Momentum Transfer Flashcards
When momentum if one fluid is used to move another fluid, such device us called
Jet pump
Head developed by centrifugal pump depends on
Speed and impeller diameter
Most commonly used joint in underground piping
sleevejoint
Schedule number of a Pipe
1000 P/S
Increasing flowrate, hydraulic efficiency …
monotonically decreases
Water hammer in a pipeline results from
rapid pressure change due to rapid change in the rate of flow
If the discharge of a centrifugal pump is throttled, the suction lift …
a. increases
b. decreases
c. same
increases
Foot valve in pumps is for
directional control
Nominal range if exit cone angle of a venturi meter
7 to 15
Ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is
2
For laminar flow through a packed bed, the pressure drop is proportional to
Vs/Dp^2
Maximum delivery pressure of compressors
1000 atm
Coefficient of velocity is ____ the coefficient of discharge
a. equal
b. less than
c. more than
more than
Pump for thick slurry
Diaghragm
Brownian movement is prominent in the size range of ____ microns in case if settling of a particle in fluid
2-3
Shear stress in a fluid flowing in a round pipe
is zero at the center and varies linearly with radius
Resistance wire used in a hot wire anemometer for conducting electrical current is made of what element
Tungsten
Draining if shallow pits or sump is done by a sump pump which us a
single stage vertical pump
Hydraulic ram acts as ___ pump
impulse
Hydraulic ram acts as ___ pump
impulse
v ave/v max for laminar flow
0.5
Pressure at a point in a fluid is not the same in all directions when the fluid is
viscous and moving
What causes convective acceleration in fluid flow?
non-uniformity of flow
Ratio if width to depth for the most economical rectangular section in an open channel
2
Boundary layer separation is characterized by
Re»>1 decelerating flow
Variable orifice flowmeter
Rotameter
Reciprocated pumps compared to centrifugal pumps
are bot subjected to air binding
Boundary layer separation occurs when
cross section of a channel is reduced
for free settling of a spherical particle through a fluid, the slop of Cd-logNre, plot
-1
Surge tanks are provided in high pressure water pipelines
to reduce water hammering
Navier-Stokes equation deals with the law of conservation of
momentum
Isotropic turbulence occurs
where there is no velocity gradient
Euler’s equation of motion expresses the law of
conservation of mass
Very small pressure difference can be most conveniently measured by an
inclined tube water manometer
If two branches of pipes are to be connected at the same point, use
tee
Acceleration head in a reciprocating pump ____ the work requirement of the pump
does not change
Ratio of inertia force to elastic force
Mach’s number or Cauchy’s number
