In order to avoid a correction for the effect of capillarity in manometers, the diameter of the tube should be
A.Less than 1 mm
B.Less than 3 mm
C.Less than 4.5 mm
D.Greater than or equal to 6 mm
E.None of the above
Category: Fluid Mechanics and Hydraulic Machines Mcqs
The size of a venturimeter is specified by
A.fluid pressure
B.Discharge channel
C.pipe diameter
D.pipe diameter and throat diameter
A flow is said to be laminar when
A.The fluid particles moves in a zig-zag way
B.The Reynold number is high
C.The fluid particles move in layers parallel to the boundary
D.None of the above
The friction factor in turbulent flow in smooth pipes depends upon the following:
A.V, D, ?, L,
B.L,
C.(L, D, ?, ?,
D.V, D,
E.L, D, Q, V.
Kinematic similarity between model and prototype means
A.The similarity of forces
B.The similarity of shape
C.The similarity of motion
D.The similarity of discharge
Eulers dimensionless number relates
A.Pressure force and inertia force
B.Inertia force and gravity force
C.Buoyant force and inertia force
D.Buoyant force and viscous force
E.Viscous force and inertia force
In an isothermal atmosphere
A.Pressure decreases linearly with elevation
B.Pressure is constant all over
C.Pressure varies in the same way as density
D.Pressure increases directly as the square of height
E.Pressure varies exponentially with density
1 N/m2 pressure is equivalent to
A.1 pascal
B.10-5 bar
C.10-2 kg/m sec2
D.7.5 x 10-3 mm Hg
E.Any of the above
The magnitude of water hammer depends on
A.The length of pipeline
B.The speed at which the valve is closed
C.To elastic properties of the liquid flowing through the pipe
D.The elastic properties of the pipe material
E.All of the above
A small plastic boat loaded with pieces of steel rods is floating in a bath tub. It the cargo is dumped into the water allowing the boat to float empty, the water level in the tub will
A.Rise
B.Fall
C.Not change
D.Rise and then fall
E.Fall and then rise
