2. How long did it take William to dig up an old pipe that had been buried under an old bathhouse?
(a) 25 minutes.
(b) 20 minutes.
(c) 15 minutes.
(d) 30 minutes.

3. Where did Trywell take Agnes when she got a bad case of Malaria?
(a) Kafukula.
(b) Rhumpi.
(c) Zomba.
(d) Mtunthama.

4. Where was the man from who invented a refrigerator that worked using water evaporation from sand?
(a) Zambia.
(b) Mozambique.
(c) Egypt.
(d) Ghana.

5. When William got a battery to store electricity, how long could energy be stored in the battery?
(a) 4 days.
(b) 5 days.
(c) 2 days.
(d) 3 days.

6. If someone took medicine provided by the clinic, how long would it usually take to get over a case of malaria?
(a) A week or two.
(b) 3 days.
(c) About a month.
(d) 10 days.

7. How far from William's bedroom would the radio signal disappear?
(a) 100 feet.
(b) 300 feet.
(c) 50 feet.
(d) 500 feet.

8. What was the name of the falls in southern Malawi where the hydro plants were?
(a) Nkula.
(b) Victoria.
(c) Kalambo.
(d) Thomson.

9. When was Baobab founded?
(a) 1999.
(b) 2000.
(c) 2001.
(d) 2002.

10. In Chapter 10, how much did Trywell receive for a kilo of tobacco?
(a) 80 cents.
(b) $1.75.
(c) 95 cents.
(d) $2.50.

11. Who was the first person who gave William a belt from a milling machine?
(a) Old man in the trading center.
(b) Geoffrey.
(c) Charity.
(d) William's uncle.

12. In a diagram in "Explaining Physics" how many volts were transformed to 240 in a step-up transformer?
(a) 12.
(b) 32.
(c) 24.
(d) 48.

13. How long were the pieces of bamboo that William wired against each windmill blade for reinforcement?
(a) 5 ft.
(b) 2 ft.
(c) 4 ft.
(d) 3 ft.

14. Where were William's teachers located when he attended ABCCA?
(a) Colorado.
(b) Lilongwe.
(c) Tanzania.
(d) Michigan.

15. When did officials from the Malawi Teacher Training Activity notice William's windmill in the schoolyard at Wimbe Primary?
(a) 2008.
(b) 2007.
(c) 2005.
(d) 2006.