Chapter 01: Essential Concepts of Radiologic Science
Bushong: Radiologic Science for Technologists, 12th Edition

MULTIPLE CHOICE

	1.	Matter is measured in ___________.
a.	kilograms	
b.	joules	
c.	electron volts	
d.	rems	

ANS:	A
Matter is measured in kilograms.

	2.	Atoms and molecules are the fundamental building blocks of ___________.
a.	energy	
b.	radiation	
c.	matter	
d.	gravity	

ANS:	C
Atoms and molecules are the fundamental building blocks of matter.

	3.	Ice and steam are examples of two forms of ___________.
a.	matter	
b.	radiation	
c.	energy	
d.	work	

ANS:	A
Ice and steam are examples of two forms of matter.

	4.	The formula E = mc2 is the basis for the theory that led to the development of __________.
a.	x-rays	
b.	electromagnetic radiation	
c.	nuclear power	
d.	cathode ray tubes	

ANS:	C
The formula E = mc2 is the basis for the theory that led to the development of nuclear power.

	5.	Radio waves, light, and x-rays are all examples of _________ energy.
a.	nuclear	
b.	thermal	
c.	electrical	
d.	electromagnetic	

ANS:	D
Electromagnetic energy includes radio waves, light, and x-rays as well as other parts of the spectrum.

	6.	A moving object has ____________ energy.
a.	potential	
b.	kinetic	
c.	nuclear	
d.	electromagnetic	

ANS:	B
A moving object has kinetic energy.

	7.	What is the removal of an electron from an atom called?
a.	Ionization	
b.	Pair production	
c.	Irradiation	
d.	Electricity	

ANS:	A
The removal of an electron from an atom is called ionization.

	8.	Ionizing radiation is capable of removing ____________ from atoms as it passes through the matter.
a.	neutrons	
b.	protons	
c.	electrons	
d.	ions	

ANS:	C
Ionizing radiation is capable of removing electrons from atoms as it passes through the matter.

	9.	The energy of x-rays is ___________.
a.	thermal	
b.	potential	
c.	kinetic	
d.	electromagnetic	

ANS:	D
X-rays are a form of electromagnetic energy.

	10.	The biggest source of man-made ionizing radiation exposure to the public is ______________.
a.	atomic fallout	
b.	diagnostic x-rays	
c.	smoke detectors	
d.	nuclear power plants	

ANS:	B
Medical x-ray exposure is the biggest source of man-made radiation.

	11.	In the United States, we are exposed to _________ mSv/year of ionizing radiation from the natural environment.
a.	0 to 5	
b.	5 to 20	
c.	20 to 90	
d.	100 to 300	

ANS:	A
We are exposed to about 3 mSv/yr of ionizing radiation from natural environmental sources in the United States.

	12.	___________ is a special quantity of radiologic science.
a.	Mass	
b.	Velocity	
c.	Radioactivity	
d.	Momentum	

ANS:	C
Radioactivity is a special quantity of radiologic science.

	13.	Today, radiology is considered to be a(n) ___________ occupation.
a.	safe	
b.	unsafe	
c.	dangerous	
d.	high-risk	

ANS:	A
Today, radiology is considered to be a safe occupation because of effective radiation protection practices.

	14.	What does ALARA mean?
a.	All Level Alert Radiation Accident	
b.	As Low As Reasonably Achievable	
c.	Always Leave A Restricted Area	
d.	As Low As Regulations Allow	

ANS:	B
ALARA means As Low As Reasonably Achievable.

	15.	Computed tomography was developed in the ________.
a.	1890s	
b.	1920s	
c.	1970s	
d.	1990s	

ANS:	C
Computed tomography was developed in the 1970s.

	16.	Filtration is used to ____________________.
a.	absorb low-energy x-rays	
b.	remove high-energy x-rays	
c.	restrict the useful beam to the body part imaged	
d.	fabricate gonadal shields	

ANS:	A
Filtration is used to absorb low-energy x-rays.

TRUE/FALSE

	1.	Mass is the quantity of matter as described by its energy equivalence.

ANS:	T
Mass is the quantity of matter as described by its energy equivalence.

	2.	Radiation is the removal of an electron from an atom.

ANS:	F
Ionization is the removal of an electron from an atom.

	3.	Radiology emerged as a medical specialty because of the Snook transformer and the Crookes x-ray tube.

ANS:	F
Radiology emerged as a medical specialty because of the Snook transformer and the Coolidge x-ray tube.