0.5
1
0.66
< 0.5
✅ The correct answer is option B.
Fluid Mechanics MCQs
A relief valve
Provides back pressure for a cylinder
Unloads a pump
Is a directional control valve
None of these
✅ The correct answer is option C.
Head developed by a centrifugal pump depends on its
Speed
Impeller diameter
Both A and B
Neither A nor B
✅ The correct answer is option C.
Pitot tube measures the __________ of a fluid.
Pressure
Average velocity
Average flow rate
Point velocity
✅ The correct answer is option D.
The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is
4(Ro-Ri)
√(Ro-Ri)
2(Ro-Ri)
Ro + Ri
✅ The correct answer is option C.
Sewage sludge is __________ type of non-Newtonion fluid.
Dilatant
Bingham plastic
Pseudo plastic
None of these
✅ The correct answer is option B.
The co-efficient of discharge of an orificemeter is a function of
Reynolds number at the orifice
Ratio of orifice dia to pipe dia
Both A and B
None of the above parameters, and has a constant value of 0.61
✅ The correct answer is option C.
In an incompressible fluid, the density is
Greatly affected by moderate changes in pressure
Greatly affected only by moderate changes in temperature
Not affected with moderate change in temperature & pressure
Sensible to changes in both temperature & pressure
✅ The correct answer is option C.
For the manometer set up shown in the figure, the pressure difference PA – PB is given by
(ρH – ρair)gH
(ρH – ρL)gH
(ρH – ρL) gH + (ρL – ρair) . g(L – H)
(ρH – ρL) gL + (ρL – ρair)gH
✅ The correct answer is option A.
Check valves are used
At high pressure
In bends
For controlling water flow
For unidirectional flow
✅ The correct answer is option D.