181. For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter)
Vs/Dp²
Vs²/Dp²
Vs²/Dp³
Vs/Dp³
✅ The correct answer is option A.
Fluid Mechanics MCQs
182. The head developed by a centrifugal pump is largely determined by the
Power of the pump
Nature of the liquid being pumped
Angle of the vanes and the speed of the tip of the impeller
Vapour pressure of the liquid
✅ The correct answer is option C.
183. In case of end to end connection of two or more pipes in series, the __________ each pipe.
Same rate of flow passes through
Head loss is same through
Rate of flow in each pipe is proportional to the length of
Total flow rate is the sum of flow rate in
✅ The correct answer is option A.
184. The contraction co-efficient for Borda’s mouthpiece (for frictionless fluid) is
0.1
0.5
0.94
1
✅ The correct answer is option B.
186. Foot valve provided in the pump is a __________ valve.
Direction control
Back pressure
Relief
Pressure reduction
✅ The correct answer is option B.
187. An equipotential line is __________ to the velocity vector at every point.
Normal
Normal
Tangential
None of these
✅ The correct answer is option A.
188. If more than two branches of pipes are to be connected at the same point, then use a/an
Elbow
Union
Tee
None of these
✅ The correct answer is option C.
189. Fanning equation is given by ∆p/ρ = 4f. L/D . v²/2g<.sub>c . It is applicable to __________ region flow.
Transition
Laminar
Turbulent
Both B and C
✅ The correct answer is option D.
190. Higher specific speed (200-500) of a centrifugal pump indicates that the pump is of __________ flow type.
Axial
Radial
Mixed
None of these
✅ The correct answer is option A.