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**Multiple Choice**

(1 pt each)

2. (head-darcy) The units for **hydraulic conductivity** are:

a. [L/T2] b. [L/T] c. [L2] d. [L2/T]

3. (goveq) Which of the following is **not** one of the basic assumptions we discussed when

deriving the governing 3D equations:

a. The soil is isotropic b. Darcy's law is valid c. Mass is conserved d. Soil is saturated e. All of the above are basic assumptions

4. (gw-concepts) Adjusting the model parameters until the output **matches** field data at the site is called:

a. post-audit b. verification c. calibration d. quality control

5. (goveq) A function representing a **direct mathematical solution** to the governing differential flow equation is called:

a. A numerical solution. b. An analytical solution. c. A flow net. d. A flow field. e. A potentiometric surface. f. None of the above.

6. (modflow) Which of the following packages is **always** required by MODFLOW?

a. Recharge b. Well c. General Head d. River e. Drain f. All of the above are optional

7. (modflow) Which of the following parameters is **not** required by the **Drain** package for each

drain cell?

a. Drain elevation b. Conductance c. Flow rate d. All are required

8. (head-darcy) The off-diagonal terms of the 2D and 3D hydraulic conductivity tensor are **nonzero** when:

a. The soil is homogenous b. The soil is isotropic c. The x and y axes are aligned with the principal axes of hydraulic conductivity d. None of the above

9. (head-darcy) Which of the following soils would have the **largest** difference between the Darcian velocity and the seepage velocity?

a. Sands b. Gravels c. Fractured Rock d. All of the above are about the same.

10. (goveq) For the governing equation:

which of the following **conditions** apply?

a. isotropic b. anisotropic c. xyz axes aligned with principal axes of hyd. conductivity d. 2D e. 3D f. steady state

11. (goveq) For the following governing equation:

which of the following conditions apply? Check all that apply.

a. isotropic b. steady state c. 3D d. sources and sinks e. transient

12. (goveq) For the following governing equation:

which of the following conditions apply?:

a. 2D b. isotropic c. The x, y, and z axes correspond to the principal axes of hydraulic conductivity d. steady state only e. internal sources and sinks f. transient