Fluid Mechanics Flashcards
6 cards from real EIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Fluid Mechanics flashcards as text
What does Bernoulli's equation express?
Answer: Conservation of energy along a streamline
Bernoulli's equation expresses conservation of energy along a streamline: P + ½ρv² + ρgh = constant.
The Reynolds number Re = ρvD/μ classifies flow as turbulent when Re exceeds approximately:
Answer: 2300
Flow in a pipe transitions from laminar to turbulent when Re exceeds approximately 2300.
What is the SI unit of dynamic viscosity?
Answer: Pa·s
Dynamic viscosity μ has SI units of Pascal-seconds (Pa·s), equivalent to N·s/m².
For a fluid at rest, pressure varies with depth according to:
Answer: P = ρgh
In a static fluid, pressure increases with depth as P = ρgh, where h is depth below the free surface.
The continuity equation for incompressible flow states:
Answer: A₁v₁ = A₂v₂
For incompressible flow, the continuity equation simplifies to A₁v₁ = A₂v₂ (conservation of volume flow rate).
What is the buoyant force on an object submerged in a fluid?
Answer: Equal to the weight of fluid displaced
Archimedes' principle states the buoyant force equals the weight of the fluid displaced by the object.