Deck 18: Radiation Safety and Protection

Question 1

The average annual dose received by the general public from all medical radiation procedures is ____ mSv.

A) 3
B) 2
C) 1
D) 0.5

Answer 1

D
The average annual effective dose equivalent from all manmade sources to an exposed individual is about 0.60 mSv.Medical procedures contribute about 0.50 mSv of that total,and consumer products contribute another 0.11 mSv.

Question 2

The monthly dose equivalent limit to an embryo/fetus is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Answer 2

A
According to NCRP Report No.116,the monthly dose equivalent limit to an embryo/fetus is 0.5 mSv.

Question 3

Slow neutrons have a QF of what?

A) 1
B) 5
C) 10
D) 20

Answer 3

B
Slow (or thermal)neutrons have a QF of 5.

Question 4

The annual dose equivalent limit to the whole body for infrequent nonoccupationally exposed individuals is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Question 5

Electrons have a quality factor (QF)of:

A) 1
B) 5
C) 10
D) 20

Question 6

The annual dose equivalent limit to the lens of the eye for non-occupationally exposed individuals is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Question 7

The annual dose equivalent limit to the whole body for occupationally exposed individuals is _____ mSv.

A) 50
B) 100
C) 150
D) 500

Question 8

The average annual dose received by the general public from radon is ____ mSv.

A) 3
B) 2
C) 1
D) 0.5

Question 9

The annual dose equivalent limit to the lens of the eye for educationally exposed individuals is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Question 10

What is the radiation weighting factor for alpha particles?

A) 1
B) 5
C) 10
D) 20

Question 11

The annual dose equivalent limit to the lens of the eye for occupationally exposed individuals is ____ mSv.

A) 50
B) 100
C) 150
D) 500

Question 12

What is the radiation weighting factor for gamma-rays?

A) 1
B) 5
C) 10
D) 20

Question 13

The total gestational dose equivalent limit is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Question 14

The annual dose equivalent limit to the whole body for frequent nonoccupationally exposed individuals is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Question 15

X-rays have a quality factor of what?

A) 1
B) 5
C) 10
D) 20

Question 16

The annual dose equivalent limit to the whole body for educationally exposed individuals is ____ mSv.

A) 0.5
B) 1
C) 5
D) 50

Question 17

The average annual dose received by the general public from naturally occurring internal radiation is ____ mSv.

A) 0.2
B) 0.11
C) 13
D) 11

Question 18

Smoking cigarettes increases an individual's radiation exposure by ____ mSv.

A) 0.2
B) 0.11
C) 13
D) 11

Question 19

The annual dose equivalent limit to the heart for occupationally exposed individuals is ____ mSv.

A) 50
B) 100
C) 150
D) 500

Question 20

The average annual dose received by the general public from all naturally occurring radiation sources is ____ mSv.

A) 3
B) 2
C) 1
D) 0.5

Question 21

A periodic leak test is performed on sealed sources to:

A) detect any leaks in the encapsulated container
B) ensure that personnel are working in a radiation-safe environment
C) neither a nor b
D) both a and b

Question 22

Which particles are most closely associated with helium?

A) alpha particles
B) beta particles
C) x-rays
D) gamma-rays

Question 23

It is recommended that gestational dose be unequally shifted to the third trimester.

Question 24

Which of the following is not a natural source of background radiation?

A) cosmic rays
B) radium and uranium
C) carbon 14
D) nuclear fallout

Question 25

The current recommended negligible individual risk level is ____ mSv/yr.

A) 0.001
B) 0.01
C) 0.1
D) 1

Question 26

Which agency provides information and recommendations in the public interest concerning radiation measurements and protection?

A) ACR
B) NCRP
C) ALARA
D) AER

Question 27

Warning signs reading "Caution,High Radiation Area" must be posted when the dose exceeds ____ mSv/hr.

A) 0.01
B) 0.1
C) 1
D) 10

Question 28

Which particles have the highest LET?

A) alpha particles
B) beta particles
C) x-rays
D) gamma-rays

Question 29

Which of the following would not be helpful in a personnel radiation-monitoring program?

A) film badges
B) routine blood examinations
C) pocket ionization chambers
D) TLDs

Question 30

Which particles can be electrons?

A) alpha particles
B) beta particles
C) x-rays
D) gamma-rays

Question 31

Which particles have no mass or charge and are emitted from the nucleus?

A) alpha particles
B) beta particles
C) x-rays
D) gamma-rays

Question 32

Thermoluminescent dosimeters are composed of ____.

A) Ra
B) Al₂O₃
C) Ce
D) LiF

Question 33

Which of the following materials are used in room shielding?
I)Cerrobend
II)concrete
III)lead
IV)steel

A) I and III
B) I,II,and III
C) II,III,and IV
D) I,II,III,and IV

Question 34

Filters are used in film badges to:

A) discriminate different directions of radiation
B) discriminate different radiation energies and types
C) correct for film fogging due to exposure
D) increase the sensitivity of the measuring device