Chapter 1 Exam

Question 1

Who was discovered x-rays and was credited for it?

Answer 1

Dr. Wilhelm Roentgen

Question 2

What was used during the discovery of x-rays?

Answer 2

Crookes cathode ray tube

Question 3

When was the first x-ray image taken?

Answer 3

December 22, 1895

Question 4

Who devised fluoroscope for real-time x-ray?

Answer 4

Thomas Edison

Question 5

Who was the first fatality from x-ray?

Answer 5

Clarence Daily

Question 6

What does ALARA stands for?

Answer 6

as low as reasonably achievable

Question 7

quality/penetration/power
reduced patient dose

Answer 7

kVp

Question 8

quantity (how many x-rays)
increased patient dose

Answer 8

mAs
mAs x time = # of x-rays (mass)

Question 9

What are the fundamental quantities?

Answer 9

mass, length, time

Question 10

What are derived quantities?

Answer 10

velocity, acceleration

Question 11

What are the radiologic quantities?

Answer 11

Roentgen (R)

Question 12

What is the term for radiation burns?

Answer 12

acute radiodermatitis

Question 13

radiation with sufficient energy to ionize atoms

Answer 13

ionizing radiation

Question 14

equal to distance traveled, divided by the time necessary to cover that distance

Answer 14

velocity

Question 15

formula & unit of measure for velocity

Answer 15

v = d/t
meters per second squared (m/s^2)

Question 16

found by subtracting the initial velocity of an object from its final velocity and dividing that value by the time used

Answer 16

acceleration

Question 17

formula & unit of measure for acceleration

Answer 17

a = (Vf - Vo) / t
meters per second squared (m/s^2)

Question 18

a push, a pull, or other action that changes the motion of an object. it is equal to the mass of the object multiplied by the acceleration

Answer 18

force

Question 19

formula & unit of measure for force

Answer 19

F = ma
meters per second squared (m/s^2)

Question 20

equal to the mass of the object multiplied by its velocity

Answer 20

momentum

Question 21

formula & unit of measure for momentum

Answer 21

p = mv
kilograms-meter per second (kg-m/s)

Question 22

an expression of the force applied to an object multiplied by the distance across which it is applied

Answer 22

work

Question 23

formula & unit of measure for work

Answer 23

work = Fd
joule (J)

Question 24

equal to work divided by time during which work is done

Answer 24

power

Question 25

the property of an object with mass that resists a change in its state of motion. mass is a measure of the amount of inertia that a body possesses

Answer 25

inertia

Question 26

simply the ability to do work

Answer 26

energy

Question 27

energy in a stored state; ability to do work by virtue of state or position

Answer 27

potential energy

Question 28

energy being expended; act of doing work

Answer 28

kinetic energy

Question 29

a form of energy that exists as an electrical and magnetic disturbance in space

Answer 29

electromagnetic energy

Question 30

a measure of the number of electrons liberated by ionization per kilogram of air

Answer 30

Coulomb/kilogram (C/kg)

Question 31

the unit for absorbed dose

Answer 31

Gray (Gy)

Question 32

used to quantify occupational exposure or dose equivalent

Answer 32

Sievert (Sv)

Question 33

used to quantify radioactivity

Answer 33

Becquerel (Bq)

Question 34

Rad

Answer 34

radiation absorbed dose

Question 35

Rem

Answer 35

radiation equivalent man

Question 36

what does Kerma stand for?

Answer 36

kinetic energy released per unit mass

Question 37

What is Kerma?

Answer 37

used to describe the quantity of radiation of released in air

Question 38

what is the unit measure for Kerma?

Answer 38

Joules/kg or Gray (Gy)

Question 39

What are the two electrodes used in the x-ray tube?

Answer 39

anode (positive, over head of table) cathode (negative, over foot of table)

Question 40

What is the date of the discovery of x-rays?

Answer 40

November 8, 1895

Question 41

A radiographer's dosimetry report is expressed in:

Answer 41

mSv

Question 42

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

Answer 42

time

Question 43

Anything that occupies space and has shape or from is:

Answer 43

matter

Question 44

What is the radiation intensity that will produce 2.08 x 10^9 ion pairs in 1cm^3 of air?

Answer 44

roentgen (R)

Question 45

What is the work done if 35 N of force is applied to move a patient 0.5m?

Answer 45

17.5 J

Question 46

The curie is an expression of:

Answer 46

Quantity of radioactive material

Question 47

X-ray examinations of the lower abdomen and pelvis of women in reproductive years should be limited to:

Answer 47

The 10 days after onset of menstruation

Question 48

What is the power used if 2000 J of work is applied for 5 seconds?

Answer 48

400 W

Question 49

What is the velocity of a car if it travels 1000 meters in 4 seconds?

Answer 49

250 m/s

Question 50

formula & unit of measure for power

Answer 50

P = work/t watts (W)