The value of mannings roughness coefficient n, in Manning’s formula for flow of fluids through pipes, is expected to be highest in case of
A.Brass pipe
B.Glass pipe
C.Asbestos cement pipe
D.Corrugated iron pipe
E.Vitrified sewer pipe
Category: Fluid Mechanics and Hydraulic Machines Mcqs
The stress in the dam should be within the specified limits for the body of dam in the foundations. If the stress at the toe and heel are excessive, they can be brought within permissible limits by
A.Grouting
B.Providing anchor blocks
C.Providing friction blocks
D.Providing filters
E.Any of the above
Manning’s formula is used to determine
A.Friction hed loss in pipes running full
B.Friction head loss in pipes running partially full
C.Friction head loss in open channels
D.Friction head loss in irregular sections
E.Discharge through weirs and notches
An ideal flow of any fluid must fulfil the following:
A.Newton’s law of viscosity
B.Newton’s law of motion
C.Boundary layer theory
D.Pascals law
E.Continuity equation
Uniform flow occurs when
A.Conditions do not change with time at any point
B.Rate of change of velocity of fluid is zero
C.At every point the velocity vector is identical in magnitude and direction for any given instant
D.The change in transverse direction are zero
E.None of the above
The pressure in millimetres of mercury gauge, equivalent to 68 mm H2O plus 54.4 mm manometer fluid, sp. Gr. 2.5 is
A.10
B.12.5
C.15.5
D.17.5
E.20
In case of Constant Angle Arch Dam, the most favourable central angle is
A.170?
B.165?
C.133?
D.90?
E.73?
The state in which Hirakund dam is established is
A.West Bengal
B.Bihar
C.Orissa
D.Madhya Pardesh
E.Uttar Pradesh
A piezometer is not used for pressure measurement in pipes when
A.The pressure is very low
B.The pressure drop in the pipe is low
C.Velocity of fluid is high
D.Velocity of fluid is low
E.The fluid in the pipe is a gas
As the temperature increases, the viscosity of a gas
A.increases, increases
B.decreases, decreases
C.increases, decreases
D.decreases, increases
