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The lead-equivalent thickness of a gonad shield should be _____ mm.


A) 0.3
B) 0.5
C) 1.0
D) 1.5

E) B) and C)
F) C) and D)

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Short-term effects of radiation would occur at absorbed doses greater than which of the following?


A) 50 mGy-t
B) 100 mGy-t
C) 200 mGy-t
D) 500 mGy-t

E) A) and C)
F) A) and D)

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The NCRP recommended 9-month equivalent dose limit for a pregnant worker is _____ mSv.


A) 0.25
B) 0.5
C) 2.5
D) 5

E) A) and B)
F) All of the above

Correct Answer

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A personnel monitor cannot measure exposures less than _____ mSv.


A) 0.025
B) 0.05
C) 0.50
D) 1.0

E) C) and D)
F) A) and D)

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Which of the following would be considered long-term effects of radiation exposure? 1) Cataracts 2) Leukemia 3) Erythema


A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

E) B) and D)
F) A) and C)

Correct Answer

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According to the NCRP,there is cause for concern if a pregnant woman receives a dose in excess of ______ to the uterus.


A) 15 Gy-t
B) 25 Gy-t
C) 150 mGy-t
D) 250 mGy-t

E) B) and D)
F) A) and B)

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A 28-year-old radiation worker can have an annual cumulative effective dose of:


A) 28 Sv
B) 280 Sv
C) 28 mSv
D) 280 mSv

E) B) and C)
F) A) and B)

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A common and observable short-term effect of radiation is:


A) erythema.
B) mutations.
C) leukemia.
D) carcinogenesis.

E) A) and B)
F) All of the above

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What is the SI unit of exposure that measures radiation in air?


A) Gray (Gy-a)
B) Sievert (Sv)
C) Rad (rad)
D) Air kerma (Gy-a)

E) A) and D)
F) A) and C)

Correct Answer

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Which of the following is measured based on the type and energy of the radiation exposed to?


A) Exposure
B) Absorbed dose
C) Equivalent dose
D) Effective dose

E) None of the above
F) B) and D)

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The most widely used and most accurate personnel monitor is the:


A) visual dosimeter.
B) film badge.
C) thermoluminescent dosimeter (TLD) .
D) optically stimulated luminescence (OSL) .

E) B) and C)
F) A) and D)

Correct Answer

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The radiation weighting factor for x-ray photons is which of the following?


A) 1
B) 2
C) 20
D) 25

E) All of the above
F) B) and C)

Correct Answer

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