The thickness of laminar boundary layer at a distance x from the leading edge over a flat plate varies as
A.x
B.x2
C.x1/2
D.x4/5
E.x3/5
Category: Fluid Mechanics and Hydraulic Machines Mcqs
A current meter is used for the measurement of
A.Pressure
B.Velocity
C.Viscosity
D.Electrical charge on fluids
E.Electrical conductivity
Select the statement which is correct
A.Standard atmospheric pressure is 1 kg/cm2
B.A barometer reads the difference between load and standard atmospheric pressure
C.Standard atmospheric pressure is the mean local atmospheric pressure at sea level
D.Local atmospheric pressure is always below standard atmospheric pressure
E.Local atmospheric pressure depends upon the elevation of the locality only
Which is higher head
A.33 inch Hg
B.31.6 ft water
C.1.013 kg/cm2
D.75.6 cm of Hg
E.14.1 psi
Which of the following pumping device for supplying water to boiler does not have moving parts?
A.Single stage centrifugal pump
B.Multistage centrifugal pump
C.Steam injector
D.Simplex pump
E.Duplex pump
In axial flow turbines
A.Water enters radially but leaves axially
B.Water enters axially but leaves radially
C.Water enters at an angle but leaves axially
D.Water enters axially and leaves axially
E.None of the above
The motion of air mass in a tornado is
A.forced vertex at the centre and free vortex outside
B.forced cortex at the centre as well as outside
C.free vortex at the centre and forced vortex outside
D.free vortex at the centre as well as outside
The general energy equation is applicable to
A.Steady flow
B.Unsteady flow
C.Non-uniform flow
D.Turbulent flow
E.Laminar flow
An object having 20 kg mass weighs 19.60 kg on a spring type balance. The value of ‘g’ in m/sec2 for the place is
A.1000
B.9.8
C.9.9
D.10.2
E.10.1
It is desired to predict the performance of a large centrifugal pump from that of a scale model one fourth the diameter. The model absorbs 20 HP when pumping under test head of 20 m at its best speed of 400 r.p.m. The large pump is required to pump against 60 m head. The following will be the speed of the pump
A.100 RPM
B.153 RPM
C.167 RPM
D.173 RPM
E.208 RPM
