LESSON 3
PRACTICE EXERCISE
The following items will test your knowledge of the material covered in this lesson. There is only one correct
answer for each item. When you complete the exercise, check your answers with the appropriate answer
key at the end of this subcourse. If you answer any items incorrectly, go back to the part of the lesson that
contains the information involved and study again.
1. How wide should earth fire walls be at the top?
A. 12 inches.
B. 16 inches.
C. 18 inches.
D. 20 inches.
2. In theaters of operation, how high should "splinter walls" be around the tank?
A. 6 or 8 feet.
B. 8 or 10 feet.
C. 10 or 12 feet.
D. 18 or 20 feet.
3. What is the formula for determining the inside diameter of the fire wall?
A. d = 4.73 x (h + 1 / c).
B. d = 2.68 x (c / h - 1).
C. c = 2.69 x (d / h-1).
D. d = 2.68. x (c / h + 1)
4. In the formula for determining the inside diameter of a fire wall, what does "c" represent?
A. Height of fire wall.
B. Diameter of fire wall.
C. Percent of capacity.
D. Tank capacity.
5. What are the fire wall dimensions, in feet, for a tank with a 10,000 gallon capacity?
A. 3 high, 1 wide.
B. 3 high, 1.5 wide.
C. 4 high, 1.5 wide.
D. 5.5 high, 1 wide.
3-5
QM 5096
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