281. Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe.
Diameter
Colour
Altitude
None of these
✅ The correct answer is option B.
Fluid Mechanics MCQs
282. Hydraulic __________ works on the principle of Pascal’s law of transmission of fluid pressure.
Press
Turbine
Pump
Coupling
✅ The correct answer is option A.
283. The bulk modulus of elasticity of a liquid
Is zero for incompressible liquid
Decreases with pressure
Is independent of temperature & pressure
Increases with pressure
✅ The correct answer is option D.
284. For turbulent flow of newtonion fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is
0.5
1
0.66
< 0.5
✅ The correct answer is option B.
285. 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.
286. 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.
287. Pitot tube measures the __________ of a fluid.
Pressure
Average velocity
Average flow rate
Point velocity
✅ The correct answer is option D.
288. 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.
289. Sewage sludge is __________ type of non-Newtonion fluid.
Dilatant
Bingham plastic
Pseudo plastic
None of these
✅ The correct answer is option B.
290. 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.