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Civil Engineering Objective Questions { Hydrology }

92. . Most commonly used section in grade aqueducts, is
A. circular
B. rectangular
C. parabolic
D. horse shoe section.

93.  Pick up the correct statement from the following regarding the pressure conduits :
A. Pressure conduits are permitted to run th full
B. Pressure conduits are always laid along down grades
C. The hydraulic gradient line always coincides the invert of the conduit
D. None of these.

94.  Pick up the incorrect statement from the following :
A. The invert of pressure conduit is independent of the grade of the hydraulic gradient line
B. The pressure conduits may be taken up-hill upto a maximum height of 8.3 m
C. Aqueducts and tunnels sections are generally kept circular
D. None of these.

95.  The formula HI, = n2v2 . L for the head loss in conduits is generally known as
A. Hazen-William's formula
B. Manning's formula
C. Darcy-Weisbach formula
D. Nikuradse formula.

96.  The formula for pipe flows, suggested by, Hazen-William is
A. V = 0.85 CH R
B. V = 0.54 CH R
C. V = 0.95 CH R
D. None of these.

97.  The approximate diameter of a water mains for supplying 7.2 mid with a velocity 1.2 m/sec, is
A. 24 cm
B. 26 cm
C. 28 cm
D. 30 cm

98.  Pick up the correct statement from the following :
A. Head loss in smaller size pipes at equal velocities, is less
B. Cost of pumping is less in smaller size pipes
C. Cost of smaller pipes is comparatively more
D. None of these.

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