1) Shear stress in a turbulent flow is given by the formula τ = η (du / dy) Where η (eta) is, a. eddy viscosity b. apparent viscosity c. virtual viscosity d. all of the above ANSWER: all of the above 2) Magnitude of eddy viscosity for laminar flow is a. less than zero b. zero c. greater than zero d. unpredictable ANSWER: zero 3) Kinematic eddy viscosity (ε) is the ratio of a. eddy viscosity (η) to dynamic viscosity (μ) b. eddy viscosity (η) to kinematic viscosity (ν) c. kinematic viscosity to eddy viscosity (η) d. eddy viscosity (η) to mass density (ρ) ANSWER: eddy viscosity (η) to mass density (ρ)