Chapter 6 Quiz

Question 1

How does an increase from 70 kvp to 100 kvp affect the energy of a k-shell characteristics photon?

a.) more information is required
b.) no change
c.) decreases
d.) increases

Answer 1

b.) no change

Question 2

In a bremsstrahlung target interaction, if the incident electron passes near the outer shell instead of close to the nucleus the photon created will have:

a.) higher energy than the incident photon
b.) the same energy as the incident photon
c.) a photon will not be created
d.) lower energy than the incident phton

Answer 2

d.) lower enery than the incident photon

Question 3

What is produced when an incident electron excites an outer shell electron?

a.) characteristic photon
b.) low energy characteristic photon
c.) heat
d.) brems photon

Answer 3

c.) heat

Question 4

What photon energy is produced by a tungsten anode if a k shell electron (69.5 kev) vacancy is filled by an N shell (12 kev) electron?

a.) 11.5 kev
b.) 81.5 kev
c.) 9 kev
d.) 57.5 kev

Answer 4

d.) 57.5 kev

Question 5

What is the average energy of a breams photon if 85 kvp is set at the control panel?

a.) 15 kev
b.) 28 kev
c.) 30 kev
d.) 85.33333 kev

Answer 5

b.) 28 kev

Question 6

The energy of characteristics photons will change when which of the following variables is modified?

a.) anode material
b.) tube voltage
c.) filtration thickness
d.) tube current

Answer 6

a.) anode material

Question 7

What is the binding energy of a k shell in a tungsten atom?

a.) 74 kev
b.) 69.5kev
c.) 32.5 kev
d.) 74 mas

Answer 7

b.) 69.5 kev

Question 8

During an xray exposure an incident electron strikes the anode with an energy of 84 kev and passes very close to the tungsten nucleus. what is the approximate energy of the brems photon?

a.) 16
b.) 1
c.) 69 kev
d.) slightly less than 84

Answer 8

d.) slightly less than 84

Question 9

Shorthand for an atoms atomic numebr is “z”

a.) true
b.) false

Answer 9

a.) true

Question 10

What is the atomic number of tungsten?

Answer 10

74

Question 11

in xray production, photons travel from cathode to anode?

a.) true
b.) false

Answer 11

b.) false

Question 12

How many electrons can the N shell of a tungsten atom hold?

a.) 64
b.) 18
c.) 32
d.) 50

Answer 12

c.) 32

Question 13

in a tungsten atom a brens interaction willl occur when the incident electron __________

a.) strikes the nucleus
b.) strikes an inner shell electron
c.) interacts with the force field around the nucleus
d.) strikes an outer shell electron

Answer 13

c.) interacts with the force field around the nucleus

Question 14

useful characteristic radiation is created within the xray tube when high energy electrons interact with:

a.) nuclear force field of the nucleus
b.) outer shell electrons
c.) electric field of the nucleus
d.) inner shell electrons

Answer 14

d.) inner shell eelctrons

Question 15

It is not possible to create a characteristic xray photon unless a cascade effect occurs.

a.) true
b.) false

Answer 15

b.) false

Question 16

In a brems interaction,, if the filament electron enters the target at 100 kev passes very close to the nucleus and leaves with 30 kev what is the energy of the photon produced?

a.) 130 kev
b.) there isnt enough information to determine the photons energy
c.) slightly less than 30 kev
d.) 70 kev

Answer 16

d.) 70 kev

Question 17

the energy of brems photon is dependent on which of the following cariables?

a.) binding energy of orbital electrons
b.) proximity of the incident electron to the nucleus
c.) direct impact with the nucleus
d.) electron binding energy of the k shell

Answer 17

b.) proximity of the incident electron to the nucleus

Question 18

the electron stream which bombards the anode is called:

a.) effective focal spot
b.) actual focal spot

Answer 18

b.) actual focal spot

Question 19

Characteristic photon energy is equal to:

a.) the difference between the original and final energy of the incident electron
b.) the kvp set by the tech
c.) the binding energy of outer shell electron
d>) the difference between the original and final energy of the incident electron

Answer 19

d.) the difference between the original and final energy of the incident electron