Civil Engineering :: Water Supply Engineering
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The maximum permissible colour for domestic supplies based on cobalt scale, is
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The dilution ratio at which the odour is hardly detectable is generally called threshold odour number and for public supplies it should not exceed
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The joint used for joining the plain ends of cast iron pipes, is
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The bacterias which may survive with or without free oxygen, are called
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Detention time for plain sedimentation tank usually ranges from
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The rate of silting in a reservoir
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Estimates of a water supply project depends upon the rate of water supply per capita consumption and probable population estimated at the end of the design period of
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In centrifugal pump installation,
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Pipes are laid parallel
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Maximum permissible colour for domestic water supplies, based on Cobalt scale, is
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A.
pump is properly primed before starting
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B.
the diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe
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C.
the foot valve fitted at the bottom end of the suction pipe, prevents the movement of water from the pump when it is stopped
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D.
the motor may burn out if it is started with empty delivery pipe and with open gate valve
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E.
all the above.
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