Questions 10 - 15 refer to the following:

A tank is a vertical cylinder with inside diameter of 6ft and a height of 15ft:

10. What is the volume of liquid in cubic feet if we fill the tank to one foot high?

A.

28.27 ft

3

B.

18.8 ft

3

C.

113.1 ft

3

D.

424.1 ft

3

11. What is the total volume of the tank in cubic feet?

A.

1686.5 ft

3

B.

442.5 ft

3

C.

424.1 ft

3

D.

847.5 ft

3

12. What is the volume of water in cubic ft in the tank if a measure stick indicates

the water surface is 6 feet below the top of the tank?

A.

170.2 ft

3

B.

254.4 ft

3

C.

1017.9 ft

3

D.

678.6 ft

3

13. What is the weight in pounds of the tank, as in the above case, if the tank

itself weighs 20 lbs per ft of height?

A.

63,424 lbs

B.

42,241 lbs

C.

16,151 lbs

D.

10,605 lbs

14. How much water in gallons would have to be removed to reduce the total

weight of the tank plus water, as in the above case, by 20%?

A.

388 gals

B.

3,230 gals

C.

2,121 gals

D.

626 gals

Revised : 18/03/02

Page 12 of 28

OFS Recruiting

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15. What would be the new level of the water, as measured from the top of the

tank, if the water in the above case (equivalent of 20% of total weight) is

removed?

A.

10.4 ft

B.

12.7 ft

C.

7.1 ft

D.

7.8 ft