Related Questions

Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the
A Pipe length
B Fluid velocity in the pipe
C Time taken to close the valve
D All of the above
A hammer and a screwdriver currently have the same price. If the price of a hammer rises by 6% and the price of a screwdriver goes up by 4%, how much more will it cost to buy 1 hammer and 1 screwdriver?
A 5%
B 10%
C 24%
D 40%
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Water hammer is caused in steam carrying pipelines, because of
A Partial condensation of steam
B Vibration of the pipeline
C High degree of superheat of steam
D Its exposure to torrential rain
Water hammer in a pipeline results from the
A Bursting of pipelines due to closure by a valve
B Rapid pressure change due to a rapid change in the rate of flow
C Pressure increase due to closure of a valve resulting in decrease in rate of flow
D None of these
Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will
A Increase
B Decrease
C Remain unchanged
D Data insufficient to predict relative pressure drop
The pressure of fluid due to hammer blow is
A Directly proportional to density of fluid
B Inversely proportional to density of fluid
C Directly proportional to $${\left( {{\text{density}}} \right)^{\frac{1}{2}}}$$  of fluid
D Inversely proportional to $${\left( {{\text{density}}} \right)^{\frac{1}{2}}}$$  of fluid
The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?
A 39
B 78
C 117
D 156
Surge tanks are provided in high pressure water pipelines to
A Store a definte quantity ofwater all the time
B Reduce the water hammer
C Facilitate easy dismantling of pipeline for cleaning and maintenance
D None of these
Fresh water carrying pipelines in chemical industries are coloured with __________ color.
A Sea green
B Brown
C Yellow
D Red

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