ME or MEng Master of Engineering Fluid Mechanics and Hydraulics 1

Question 1

Bernoulli's equation is derived from which conservation principle?

Accepted Answer

Conservation of energy

Answer

Conservation of mass

Answer

Conservation of momentum

Answer

Conservation of angular momentum

Question 2

The Reynolds number for flow in a pipe transitions from laminar to turbulent at approximately:

Accepted Answer

Re = 2300

Answer

Re = 500

Answer

Re = 10,000

Answer

Re = 100,000

Question 3

The Darcy-Weisbach equation is used to calculate:

Accepted Answer

Head loss due to friction in pipe flow

Answer

Lift on an airfoil

Answer

Buoyancy force on submerged bodies

Answer

Pressure at the stagnation point

Question 4

Pascal's Law states that pressure applied to an enclosed fluid:

Accepted Answer

Is transmitted equally in all directions

Answer

Decreases with depth

Answer

Acts only in the direction of gravity

Answer

Is proportional to the fluid's viscosity

Question 5

The continuity equation for steady incompressible flow requires that:

Accepted Answer

The product of cross-sectional area and velocity is constant

Answer

Pressure is constant along a streamline

Answer

Viscosity is zero throughout the flow

Answer

Flow velocity is uniform across any cross section

Question 6

Dynamic viscosity has SI units of:

Accepted Answer

Pa·s

Answer

m²/s

Answer

N/m²

Answer

kg/m³