Deck 1: The History of Ionizing Radiation and Basic Principles of X-Ray Generation

Question 1

Ionization occurs:

A)when an atom loses a proton.
B)when the atom has no charge.
C)when an atom gains a neutron.
D)when an atom loses an electron.

Answer 1

when an atom loses an electron.

Question 2

Electromagnetic spectrum is a grouping of electrons.

Answer 2

False

Question 3

All of the following are the basic elements of an x-ray tube needed to produce x-rays EXCEPT one.Which one is the EXCEPTION?

A)High voltage
B)The production of heat
C)A target to stop the electrons
D)A source of electrons within the tube.

Answer 3

The production of heat

Question 4

The distance from the crest of one wave to the crest of another wave is called the frequency.The wavelength of a wave is the number of oscillations per unit of time.

A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Question 5

The release of electrons from the hot tungsten filament at the cathode is called the thermionic emission effect.

Question 6

Identify the particles that compose the nucleus of an atom:

A)electrons and photons.
B)electrons and protons.
C)protons and neutrons.
D)neutrons.

Question 7

The duty rating refers to the number of consecutive seconds a machine can be operated before it overheats,and the duty cycle refers to the portion of every minute that the dental machine can be used without overheating.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second is false.
D)The first statement is false,the second is true.

Question 8

Each of the following are examples of particulate radiation EXCEPT one.Which one is the EXCEPTION?

A)Neutrons
B)Electrons
C)Alpha particles
D)Gamma particles

Question 9

The tungsten filament in the x-ray tube is found at the cathode.

Question 10

Each of the following are properties of x-rays EXCEPT one.Which one is the EXCEPTION?

A)x-rays are invisible.
B)x-rays travel in wavy lines.
C)x-rays can penetrate structures.
D)x-rays can adversely affect human tissues.

Question 11

Particulate radiations are most commonly emitted from radionuclides.

Question 12

Federal regulations require that all dental x-ray machines have which of the following?

A)An audible signal in addition to the signal lights in the control panel when an exposure is being made.
B)A light in the control panel that signals when an exposure is being made.
C)An audible signal when an exposure is being made.
D)There are no federal regulations in this area.

Question 13

The total x-ray energy produced by the collision of the electrons with the target inside the x-ray tube is approximately:

A)less than 1%.
B)10%-20%.
C)50%.
D)99%.

Question 14

The amount of heat produced in the x-ray tube is less than the amount of radiation produced.

Question 15

Identify the metal used in the focal spot of the x-ray tube:

A)iron.
B)copper.
C)tungsten.
D)molybdenum.

Question 16

Ultrasonic radiation is part of the electromagnetic spectrum,and has no effect on tissue.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second is false.
D)The first statement is false,the second is true.

Question 17

The difference in the electromagnetic spectrum between x-rays and visible light lies in the:

A)energy.
B)wavelength.
C)subatomic particles.
D)weightlessness of the waves.

Question 18

The target or focal spot in the x-ray tube can be found at the:

A)positively charged anode.
B)negatively charged anode.
C)positively charged cathode.
D)negatively charged cathode.

Question 19

In a stable atom the number of orbiting electrons (-)equals the number of protons (+)in the nucleus.Therefore,the atom is electrically neutral.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second is false.
D)The first statement is false,the second is true.