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Rad Bio Section 1

Total questions: 36

Worksheet time: 18mins

Name
Class
Date
1.

What does ALARA Stand for?

a)

As Low As Reliably Achievable

b)

As Low as You can go

c)

As Low as reasonably achievable

d)

as low as reasonably able

2.

What is the largest source of natural environmental radiation?

a)

Cosmic Rays

b)

Radon

c)

Uranium

d)

Airport scanners

3.

The Atomic mass number is representative of what?

a)

number of protons in the nucleus

b)

# of protons and neutrons in the nucleus

c)

Neutrons

d)

electrons + protons

4.

The Atomic number is representative of what?

a)

protons + neutrons

b)

protons

c)

electrons and protons

d)

neutrons

5.

An element that has the same # of protons but have a different # of neutrons is called a (an)

a)

isotone

b)

isotope

c)

isobar

d)

isomer

6.

Name two types of ionizing particulate radiation.

a)

gamma and beta

b)

alpha and beta

c)

x-ray and gamma

d)

x-ray and beta

7.

Name two types of ionizing electromagnetic radiation?

a)

alpha and beta

b)

gamma and beta

c)

x-ray and gamma

d)

alpha and gamma

8.

What procedure that we discussed in class has the longest BERT ?

a)

chest xray

b)

PET CT

c)

Bone Scan

d)

Panorex Dental x-ray

9.

An isotone refers to atoms that have the .................

a)

same number of protons

b)

same number of neutrons

c)

same Atomic mass

d)

same configuration

10.

Medical imaging accounts for approximately what annual dose to the public each year?

a)

3.0 mGy

b)

2.0 mSv

c)

2.5 mGy

d)

3.2 mSv

11.

What type of particulate radiation cannot penetrate a piece of paper?

a)

gamma

b)

x-ray

c)

alpha

d)

beta

12.

Natural Background radiation results in an annual dose to the general public of ____________.

a)

3 mGy

b)

3 mSv

c)

3 mrem

d)

3 Gy

13.

What happens to the atomic # during beta emission with a negatron emission?

a)

it increases by 2

b)

it decreases by 2

c)

it increases by 1

d)

it decreases by 1

14.

A Beta particle with a charge of +1 (one unit of positive charge) is called a.......

a)

negatron

b)

proton

c)

positron

d)

animatronic

15.

Compton interactions affect the image by:

a)

Increasing contrast

b)

Decreasing contrast

c)

No change on contrast

16.

What is the SI unit of measuring exposure in air (Air KERMA)?

a)

Gya

b)

Gyt

c)

Roentgen

d)

Sv

17.

If the half life of Technetium is 6 hrs and we start with 100 mCi how much will be left after 12 hrs?

a)

50 mCi

b)

25 mCi

c)

75 mCi

d)

12.5 mCi

18.

Convert 157 mGy to Gy

a)

15.7 Gy

b)

1.57 Gy

c)

.157 Gy

d)

157,000 Gy

19.

In which of the x-ray matter interactions does the photon interact with an inner shell electron and become totally absorbed?

a)

Photoelectric

b)

Photodisintegration

c)

Compton

d)

Pair Production

20.

What is the SI unit of measuring effective dose and occupational exposure?

a)

Bq

b)

Gya

c)

Gy

d)

Sv

21.

In which of the x-ray matter interactions does the photon interact with nucleus of an atom? The energy of the x-ray photon is converted into two electrons, one with a positive charge (positron) and one with a negative charge. When the positron interacts with a free electron, they annihilate each other and release 2 photons with an energy of .51 meV.

a)

Pair production

b)

Photodisintegration

c)

Photoelectric effect

d)

Compton

22.

Which of the following interactions is most likely to occur with photons with an energy of 10keV or less?

a)

Compton

b)

Photoelectric

c)

Coherent

d)

Pair Production

23.

In which of the x-ray matter interactions does the photon become totally absorbed by the nucleus causing the nucleus to become radioactive?

a)

photoelectric

b)

pair production

c)

photodisintegration

d)

compton

24.

The probability of a PE interaction occurring is largely dependent on what property of the matter it will interact with?

a)

number of neutrons

b)

Z of element

c)

number of electrons

d)

water content in cell

25.

Which of the following effect the probability of a Compton interaction?

a)

Z of element

mass density

energy of photon

b)

number of protons

mass density

energy of photon

c)

mass density

energy of photon

d)

Z of element

mass density

26.

From which of the x-ray matter interactions does the radiographer get most of their occupational exposure?

a)

photoelectric

b)

compton

c)

pair production

d)

photodisintegration

27.

In which of the x-ray matter interactions does the photon interact with an outer shell electron and eject the electron. The photon continues but with less energy and in a different direction?

a)

photoelectric

b)

compton

c)

photodisintegration

d)

pair production

28.

The incoming photon must have an energy of ______ MeV for photodisintegration to occur?

a)

1.02 MeV

b)

1.02 keV

c)

.511 keV

d)

10 MeV

29.

In order for pair production to occur, the incoming photon must have an energy of at least______.

a)

10 Mev

b)

1.02 MeV

c)

.511 keV

d)

.5 Mev

30.

A 75 keV photon interacts with an oxygen atom. What is the energy of the photoelectron produced if a photoelectric interaction occurs? The Binding energy of the k shell electron in an oxygen atom is .5 keV.

a)

75.5 keV

b)

80 keV

c)

74.5 keV

d)

70 keV

31.

The probability of a photoelectric interaction is affected by the following....

a)

Z 3

1/E3

b)

1/Z 3

E3

c)

1/Z

E3

d)

Z 2

1/E2

32.

If we were measuring the output of room 3 what unit would we put our report in?

a)

Sv

b)

Gyt

c)

Ci

d)

Gya

33.

A photoelectric interaction can occur with which of the following atoms if the incoming photon has an energy of 34 keV.

a)

atom with a K shell binding energy of 40

b)

atom with a K shell binding energy of 33

c)

atom with a K shell binding energy of 35

d)

atom with a K shell binding energy of 78

34.

What SI Unit is used to measure radioactivity?

a)

Curie

b)

Becquerel

c)

Gray

d)

Seivert

35.

As mass density increases, x-ray transmission to the IR.........

a)

decreases

b)

increases

c)

is unaffected

36.

The probability of a Compton interaction is........

a)

directly proportional to the energy of the incoming x-ray photon

b)

indirectly proportional to the energy of the incoming x-ray photon

c)

not affected by the energy of the incoming photon

d)

indirectly proportional to the 3rd power of the energy of the incoming photon

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