40 TOP FLUID MECHANICS Online Test – Multiple Choice Questions and Answers Posted on April 16, 2024April 16, 2024 by engineer2 Comments 1. Drag force acting on a body does not depend upon the density of the fluid velocity of the body density of the body projected area of the body 2. Mass velocity is independent of temperature & pressure, when the flow is unsteady through unchanged cross-section steady through changing cross-section steady and the cross-section is unchanged unsteady and the cross-section is changed 3. If more than two branches of pipes are to be connected at the same point, then use a/an union elbow tee none of these 4. Very small pressure difference (< 5 mm water coloumn) can be most conveniently measured by a/an __________ manometer inclined tube mercury U-tube water U-tube mercury inclined tube water 5. Check valves are used in bends at high pressure for controlling water flow for unidirectional flow 6. For ideally incompressible fluid, the Mach number will be 1 1.5 2 5 7. In an incompressible fluid, the density is sensible to changes in both temperature & pressure not affected with moderate change in temperature & pressure greatly affected only by moderate changes in temperature greatly affected by moderate changes in pressure 8. Which of the fluid forces are not considered in the Reynold’s equation of flow ? Pressure forces Compressibility forces Turbulent forces Viscous forces 9. Acceleration head in a reciprocating pump increases the work done during delivery stroke increases the work done during suction stroke does not change the work requirement of the pump decreases the work done during suction stroke 10. Velocity distribution for flow between two fixed parallel plates varies parabolically across the section is zero at the plates and increases linearly to the midplane is constant over the entire cross-section none of these Loading … Question 1 of 10
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