Safety

Question 1

The frequency of a sine wave is measured by the

Answer 1

Number of times per second that the crest passes a given point

Question 2

All electromagnetic energy moves through space at the same

Answer 2

Velocity

Question 3

Which quality factor is a key visibility of detail?

Answer 3

Contrast

Question 4

The contrast in the radiographic image is controlled by

Answer 4

KVp

Question 5

The unit of potential difference is the

Answer 5

Volt

Question 6

How does scatter radiation fog reduce the visibility of detail in a radiographic image?

Answer 6

Decreases contrast

Question 7

The NCRP recommended monthly equivalent dose limit for a pregnant worker is ___ mSv

Answer 7

0.5

Question 8

What is the SI unit of expsoure that measures radiation in the air?

Answer 8

Air karma (Gy-a)

Question 9

The unit commonly used to report the effective dose to occupational workers in the US is

Answer 9

Msv

Question 10

Which of the following changes decrease the dose to the limited operator?

Answer 10

Minimizing time spent in the radiation area, increasing the distance between the operator and the source of radiation, use shielding control booth and lead apparel

Question 11

When an image demonstrates many densities, and there is little difference between the densities, the image is described as having

Answer 11

Long scale contrast

Question 12

What is required to move the electron stream rapidly across the x-ray tube?

Answer 12

High potential difference

Question 13

What type of radiation is produced when an incoming electron interacts with the K-shell electron in the tungsten atom?

Answer 13

Characteristic radiation

Question 14

The primary controlling factor is of penetration of X-rays

Answer 14

Kvp

Question 15

The degree of angulation of the x-ray tube target will determine the

Answer 15

Effective focal spot

Question 16

Which of the following are characteristics of x-rays

Answer 16

Travel in straight lines, can cause biological effect on tissue, cannot be felt seen or heard

Question 17

When an image demonstrates great differences between the densities, the image is described as

Answer 17

High contrast

Question 18

What term is applied to the distance from one crest to the next in a sine wave

Answer 18

Wavelength

Question 19

Patient doses in radiography are usually calculated as the

Answer 19

Entrance skin exposure (ESE)

Question 20

If the mA doubles, the quantity of the exposure will

Answer 20

Double

Question 21

What are the four primary factors that directly affect how the x-ray image looks?

Answer 21

Density, contrast, distortion, and spatial resolution

Question 22

Compton scatter occurs when an x-ray photon interacts with which part of the atom in the patients body

Answer 22

Outer orbital electron

Question 23

During the photoelectric effect, an incoming photon interacts with the atom in the patients body. What happens to the photon with this effect?

Answer 23

It is totally absorbed by the atom

Question 24

What is the guiding philosophy of radiation protection?

Answer 24

ALARA

Question 25

Which of the following are the prime factors of exposure in radiography?

Answer 25

MA, time, kvp, SID

Question 26

Contrast is directly influenced by

Answer 26

Fog & collimation

Question 27

Which of the following is an accurate statement regarding the characteristics of x-rays? They can

Answer 27

Penetrate matter

Question 28

The SI unit for measuring the absorbed dose is the

Answer 28

Gray (Gy-t)

Question 29

Higher kvp settings produce images with

Answer 29

Long scale conrast

Question 30

As kvp is increased, Compton interactions will

Answer 30

Increase

Question 31

A smaller effective focal spot produces

Answer 31

Greater image sharpness

Question 32

The precise area on the target where the x-rays strike is called the

Answer 32

Focal spot

Question 33

Which of the following occurs when the mA is doubled

Answer 33

Radiographic density increases and there are twice as many photons in the X-ray beam

Question 34

Which of the following reduces the amount of scatter radiation fog on an image?

Answer 34

Decrease in kvp, decrease in field size

Question 35

The federal regulation for the lead equivalency of protective aprons that are worn in the radiographic room is ___ mm

Answer 35

0.5

Question 36

Which of the following transformers would have more windings on the primary side?

Answer 36

Step down transformer

Question 37

Which of the following will minimize shape distortion?

Answer 37

Position plane of subject parallel to plane of IR and position the CR perpendicular to IR and subject

Question 38

The lead equivalent thickness of a gonad shield should be ___ mm

Answer 38

0.5

Question 39

The primary controlling factor of contrast is

Answer 39

Kilovoltage

Question 40

Scatter radiation fog will 1) Increase density,2) decrease contrast, 3)reduce visibility of detail

Answer 40

Increase density, decrease contrast, reduce visibility of detail

Question 41

A change from the small focal spot to the large focal spot results in

Answer 41

Decreased resolution

Question 42

When a body part appears on a radiograph as longer than it actually is, the term used is

Answer 42

Elongation

Question 43

The factors that affect X-ray quality are

Answer 43

Kilovoltage and filtration

Question 44

Short term affects of radiation would occur within how long

Answer 44

3 months

Question 45

The photoelectric effect occurs when an incoming photon from the primary beam interacts with which part of the atom in the patients body?

Answer 45

Inner shell electron

Question 46

The annual effective dose limit for an occupational radiation worker is

Answer 46

50 mSv

Question 47

Which of the following can the limited operator do to keep radiation exposure to patients as low as reasonably achievable

Answer 47

Use a small radiation field, use the highest kvp possible, and never use an SID below 40 inches

Question 48

The geometric factors that affect the formation of the image are

Answer 48

SID and OID

Question 49

What are the four essential elements required for x-ray production?

Answer 49

A target, a vacuum, an electron source, and high potential difference