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
Related Mcqs:
- 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 A., B. and C. - Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an________________?
A. Weir
B. Hot wire anemometer
C. Cup and vane anemometer
D. None of these - The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _______________ the mean velocity of flow?
A. Directly proportional to
B. Directly proportional to square of
C. Inversely proportional to
D. Inversely proportional to square of - In case of supersonic flow of a fluid through pipeline, the ‘Mach number’ is__________________?
A. 0
B. 1
C. < 1
D. > 1 - The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a____________________?
A. Weir
B. Pitot tube
C. Kennison nozzle
D. V-notch - Nature of fluid flow during the opening of a valve in a pipeline is_________________?
A. Laminar
B. Unsteady
C. Steady
D. Uniform - ____________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline?
A. Venturimeter
B. Pressure gauge
C. Pitot tube
D. Orificemeter - Which of the following factors does not contribute to the pressure drop in a pipeline ?
A. Velocity of fluid
B. Size of pipe
C. Length of pipe and number of bends
D. None of these - Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flowmeters, because their ______________ is very low/small?
A. Thermal conductivity
B. Electrical conductivity
C. Specific gravity
D. Electrical resistivity - A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit E. to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062 ?
A. 10 m
B. 11 m
C. 11.8 m
D. 30 m
