Image Production Test Retake

Question 1

A decrease in kilovoltage will result in:
1.) a decrease in image resolution
2.) a decrease in photon energy
3.) a decrease in receptor exposure

a.) 1 only
b.) 1 and 2 only
c.) 2 and 3 only
d.) 1, 2 and 3

Answer 1

c.) 2 and 3 only

Question 2

How does filtration affect the primary beam?

a.) it increases the average energy of the primary beam
b.) it decreases the average energy of the primary beam
c.) it makes the primary beam more penetrating
d.) it increases the intensity of the primary beam

Answer 2

a.) it increases the average energy of the primary beam

Question 3

Which aspect of the x-ray circuit protects the system from power surges and short circuits?

a.) autotransformer
b.) kvp meter
c.) the circuit breaker
d.) exposure timer

Answer 3

c.) the circuit breaker

Question 4

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

a.) brems photon
b.) heat
c.) characteristic photon
d.) classical photon

Answer 4

b.) heat

Question 5

Lead shutters are part of the:

a.) collimator
b.) tube stand
c.) xray tube
d.) tube housing

Answer 5

a.) collimator

Question 6

When using high technique settings, which cathode filament will be automatically selected?

a.) small filament
b.) large filament
c.) both filaments

Answer 6

b.) large filament

Question 7

The inverse square law relates intensity (of light/x-rays) to:

a.) time
b.) velocity
c.) distance
d.) mass

Answer 7

c.) distance

Question 8

What is the inverse square law formula?

Answer 8

I1/12=D2^2/D1^2

Question 9

As mas increases, quality:

a.) decreases
b.) increases by a factor of 4
c.) increases
d.) is unaffected

Answer 9

d.) is unaffected

Question 10

Attenuation is the process through which xray interactions with matter result in:

a.) reduction in beam quantity
b.) reduction in beam divergence
c.) reduction in beam penetrability
d.) reduction in beam quality

Answer 10

a.) reduction in beam quantity

Question 11

What is the secondary (output) voltage of the transformer when the assigned tube potential is 76 kvp?

a.) 220 kvp
b.) 76 kv
c.) 220 v
d.) 76 v

Answer 11

d.) 76 v

Question 12

If the distance from the source is changed from 72 inches to 36 inches and the original beam intensity was 200 mR, what is the new intensity?

a.) 800 mR
b.) 400 mR
c.) 50 mR
d.) 100 mR

Answer 12

a.) 800 mR

Question 13

A large anode angle will produce which of the following?

a.) increases spatial resolution
b.) decreases image receptor exposure
c.) a large heel effect
d.) increases image receptor exposure

Answer 13

d.) increases image receptor exposure

Question 14

X-ray beam intensity is a term describing the:

a.) number of photons
b.) frequency of photons
c.) maximum energy of photons
d.) photon quality

Answer 14

a.) number of photons

Question 15

X-rays and gamma rays are the only members of the electromagnetic spectrum capable of ionizing matter.

a.) true
b.) false

Answer 15

a.) true

Question 16

To take advantage of the anode heel effect, the thicker part of a patient should be placed where?

a.) cathode side
b.) anode side

Answer 16

a.) cathode side

Question 17

Scatter radiation reduces radiographic quality by changing:

a) distortion
b.) optical density
c.) blurring
d.) contrast

Answer 17

d.) contrast

Question 18

As kvp increases, scatter radiation will:

a.) remain unchanged
b.) increase because of more compton interactions
c.) decrease because of less photoelectric interactions
d.) decreases becasue of less Compton interactions

Answer 18

b.) increase because of more compton interactions

Question 19

How does an increase of 25 mas to 50 mas affect x-ray beam quality?

a.) increases quality
b.) it depends on the focal spot size
c.) decreases quality
d.) it has no effect

Answer 19

d.) it has no effect

Question 20

Examples of artifacts that must be accepted include all of the following except:
1.) pacemakers
2.) dental bridges
3.) pleural drainage tubes secured with safety pins
4.) endotracheal tubes
5.) heart monitoring lines

a.) 1, 2 and 4
b.) 1 and 4
c.) 2 and 3
d.) 3 and 5 only

Answer 20

d.) 3 and 5 only

Question 21

The heel effect occurs because of :

a.) reduced tube current
b.) x-ray absorption in the anode
c.) the shape charge effect
d.) a focusing cup
e.) the shape of the filament

Answer 21

b.) xray absorption in the anode

Question 22

Leakage radiation in an x-ray tube must not exceed?

a.) 100 mR/hr per meter
b.) 200 mR/hr per foot
c.) 10 mR/hr per inch
d.) 1 Mr/hr per meter

Answer 22

a.) 100 mR/hr per meter

Question 23

A transformer operates on the principle of:

a.) mechanical transformation
b.) electromagnetic induction
c.) electromechanical action
d.) magnetism

Answer 23

b.) electromagnetic induction

Question 24

If a transformer has 8 turns in the primary, 40 turns in the secondary and 110 volts applied, what is the output voltage?

a.) 550 amps
b.) 550 volts
c.) 22 amps
d.) 22 volts

Answer 24

b.) 550 volts

Question 25

A particular radiograph was produced using 12 mas and 85 kvp with a 16:1 ratio grid. The radiograph is to be repeated using an 8:1 grid ratio. What should be the new milliampere-seconds value?

a.) 10
b.) 3
c.) 6
d.) 8

Answer 25

d.) 8

Question 26

Characteristic photon energy is equal to:

a.) the kilovoltage peak set by the technologist
b.) the difference between the inner shell and outer shell binding energy
c.) the difference between the original and final energy of the incident electron
d.) the bonding energy of the outer shell electrons

Answer 26

b.) the difference between the inner shell and outer shell binding energy

Question 27

Which interaction is responsible for producing the most x-ray photons at the x-ray tube target?

a.) photoelectric
b.) heat
c.) characteristic
d.) brems

Answer 27

d.) brems

Question 28

The quantity of electrons is controlled by what technical setting?

a.) s
b.) kvp
c.) mas

Answer 28

c.) mas

Question 29

According to the basic principles of radiation protection, a radiographer should minimize what?

a.) patient protection
b.) sheilding
c.) time
d.) distance

Answer 29

c.) time

Question 30

A transformer is constructed with 100 turns on the primary side and 10 turns on the secondary side . What type of transformer is this?

a.) step down transformer
b.) step up transformer

Answer 30

a.) step down transformer

Question 31

As the anode target angle increases:

a.) kvp increases
b.) effective focal spot size increases
c.) radiation intensity on the central ray increases
d.) heel effect becomes more pronounced
e.) target rotation speed increases

Answer 31

b.) effective focal spot size increases