381. Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an
Pitot tube
Venturimeter
Orificemeter
Rotameter
✅ The correct answer is option A.
Fluid Mechanics MCQs
383. Scale up of agitator design requires
Geometrical similarity only
Dynamic similarity only
Both geometrical and dynamic similarity
All of the above
✅ The correct answer is option D.
384. Purpose of air lift pump is to
Compress air
Lift compressed air
Lift water from a well by using compressed air
Lift air under negative pressure
✅ The correct answer is option C.
385. Diaphragm pumps are used to transport
Solids
Liquids
Fluids
Slurries
✅ The correct answer is option D.
386. Potential flow is characterised by the
Irrotational and frictionless flow
Irrotational and frictional flow
One in which dissipation of mechanical energy into heat occurs
Formation of eddies within the stream
✅ The correct answer is option A.
387. Foot valves provided in pumps are __________ valves.
Relief
Three/four way
Pressure reducing
Directional control
✅ The correct answer is option D.
388. The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.
Inlet tip of a blade curves in a direction opposite to that
Outlet tip of a blade curves in a direction opposite to that
Inlet tip of a blade is towards the direction
Outlet tip of a blade is towards the direction
✅ The correct answer is option D.
389. Normal depth in open channel flow is the depth of flow in the channel
Corresponding to uniform flow
Measured normal to the channel bed
Corresponding to steady flow
None of these
✅ The correct answer is option A.
390. While starting an axial flow pump, its delivery valve should be kept
Open
Closed
Either open or closed
None of these
✅ The correct answer is option A.