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The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called
A Syphon
B Super passage
C Super-aqueduct
D Syphon aqueduct
Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to
A Avoid the overheating of the tubes & bellows which operate them to minimise error and damage
B Form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured
C Both 'A' & 'B'
D Avoid the static head error introduced by steam entry
The pressure at the summit of a syphon is
A equal to atmospheric
B less than atmospheric
C more than atmospheric
D none of the above
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called
A upthrust
B reaction
C buoyancy
D metacentre
The uplift pressure on the face of a drainage gallery in a dam is taken as
A hydrostatic pressure at toe
B average of hydrostatic pressure at toe and heel
C two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel
D none of the above
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called
A Up-thrust
B Reaction
C Buoyancy
D Metacentre
To avoid an interruption in the flow of a syphon, an air vessel is provided
A at the inlet
B at the outlet
C at the summit
D ay nay point between inlet and outlet
In a syphon aqueduct
A Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough
B Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough
C Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough
D Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough
In a canal syphon, the flow is
A Under atmospheric pressure
B Pipe flow
C With critical velocity
D Under negative pressure
The velocity of drainage water in the barrels of a syphon-aqueduct, is normally limited to
A 1 to 2 m per second
B 2 to 3 m per second
C 3 to 4 m per second
D 4 to 5 m per second

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