NOTE: To answer question 5, refer to the information below or Figure A-1 in Appendix A, page A-
5.
Given: To determine H-hour by the mathematical method, use the formula:
Tb Ta
T1
1
Ra
n
1
Rb
5. The earliest and latest data from a series of monitoring reports are shown below. At what time was H-
hour?
Earliest reading = 150 cGyph at 0900 hours, 24 June.
Latest reading = 42 cGyph at 1800 hours, 24 June.
A.
0317
B.
0345
C.
0414
D.
0518
NOTE: To answer question 6, refer to Figure 4-5 and Tables A-1 through A-4 in Appendix A, pages
A-1 through A-4.
Time of Reading
0900
0930
1000
1030
1100
1130
Dose rate (cGyph)
Location
A
65
28
18
12
10
8
B
35
21
15
12
9
C
90
62
49
39
Figure 4-5. Monitoring Data
6. You have received monitoring data from three locations as shown in Figure 4-5. H-hour is determined
to have been at 0830. What is the average value for n based on this data?
A.
0.08
B.
1.0
C.
1.2
D.
1.5
CM2306
4-14
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