10
100
250
1000
✅ The correct answer is option D.
Fluid Mechanics MCQs
Glass pipes can be joined by
Flanges
Welding
Soldering
Bell and spigot joint
✅ The correct answer is option D.
Which of the fluid forces are not considered in the Reynold’s equation of flow?
Viscous forces
Turbulent forces
Pressure forces
Compressibility forces
✅ The correct answer is option D.
Two dimensional stream function
Relates velocity and pressure
Is constant along a stream line
Is constant along an equipotential surface
None of these
✅ The correct answer is option B.
The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.
Nikuradse
Von-Karman
Blausius
Colebrook
✅ The correct answer is option A.
Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.
1
0.1
0.01
0.001
✅ The correct answer is option C.
The fluid property, due to which, mercury does not wet the glass is
Surface tension
Viscosity
Cohesion
Adhesion
✅ The correct answer is option A.
Which of the following denotes the effect of compressibility in fluid flow?
Weber number
Mach number
Euler number
Reynolds number
✅ The correct answer is option B.
With increasing flow rate, the hydraulic efficiency of a centrifugal pump
Monotonically decreases
Decreases and then increases
Remains constant
Increases and then decreases
✅ The correct answer is option A.
The most economical flow control valve for use with large diameter pipes is a
Butterfly valve
Globe valve
Needle valve
None of these
✅ The correct answer is option A.