Fluid Mechanics MCQ

Q1. What is the SI unit of dynamic viscosity?

Q2. The Reynolds number helps predict:

Q3. In fluid flow, Bernoulli’s equation represents the conservation of:

Q4. What is the critical Reynolds number for flow in a pipe?

Q5. The flow where fluid layers slide past one another smoothly is called:

Q6. The ratio of inertial force to viscous force is:

Q7. What does the continuity equation express?

Q8. The no-slip boundary condition implies:

Q9. Pascal’s law relates to:

Q10. Which instrument measures pressure in fluids?

Q11. Hydrostatic pressure at depth h in a fluid is:

Q12. Drag force experienced by an object moving through fluid depends on:

Q13. Flow in which velocity at a point does not change with time is:

Q14. Hydraulic diameter is used to characterize flow in:

Q15. Kinematic viscosity is:

Q16. The boundary layer is the region where:

Q17. What is the significance of Mach number?

Q18. Froude number is relevant in:

Q19. In turbulent flow, velocity fluctuations occur:

Q20. Poiseuille’s law describes:

Q21. Manometer fluid should have:

Q22. Surface tension arises due to:

Q23. Which theory explains the velocity profile in laminar flow?

Q24. A Venturi meter measures:

Q25. Hydraulic jump occurs when:

Q26. Which dimensionless number relates inertial to gravitational forces?

Q27. The velocity of fluid molecules near a stationary wall is:

Q28. Incompressible flow assumes:

Q29. Which parameter affects the lift generation on a wing?

Q30. The transition from laminar to turbulent flow is influenced by:

Q31. A pitot tube measures:

Q32. Porosity of a medium is:

Q33. Newtonian fluids have:

Q34. Turbulent kinetic energy is dissipated mainly by:

Q35. The Prandtl number is the ratio of:

Q36. Boundary layer thickness decreases with:

Q37. Sink flow refers to:

Q38. Flow separation occurs due to:

Q39. In flow through pipes, Darcy-Weisbach equation is used to calculate:

Q40. Which equipment measures velocity profiles in fluid flows?