12.
The LD-50 for radiation exposure in man is:
a.
100 to 200 rads.
b.
200 to 500 rads.
c.
500 to 800 rads.
d.
800 to 3,000 rads.
13.
The length of time it takes for one-half of a given number of atoms of one
element to decay into another element is the atom's:
a.
Half-life.
b.
Atomic number.
c.
Radioactive change.
d.
Radioactive stability.
14.
Of the following, the most important factor in selecting a radiation detector is:
a.
Weight and portability of the instrument.
b.
Type of radiation.
c.
Cost of the instrument.
d.
Chemical form of the radiation.
15.
What types of radiation does the AN/VDR-2 detect?
a.
Gamma only.
b.
Gamma and alpha.
c.
Gamma and beta.
d.
Gamma, alpha, and beta.
MD0180
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