Question 1

X-rays were discovered in 1895 by:

Accepted Answer

A)   Coolidge.
B)   Crookes.
C)   Roentgen.
D)   Edison. C

Question 2

The container for the vacuum of the x-ray tube is made of:

Accepted Answer

A)   glass.
B)   aluminum.
C)   tungsten.
D)   carbon. A

Question 3

The function of an x-ray grid is to:

Accepted Answer

A)   decrease patient radiation dose.
B)   increase radiographic resolution.
C)   increase radiographic contrast by reducing scatter radiation fog.
D)   increase radiographic density. C

Question 4

A doubling of the mA with no change in exposure time will result in which of the following?
1)Increased anode heat
2)Increased radiographic density
3)Increased number of photons in the x-ray beam

Accepted Answer

A)   1 only
B)   2 only
C)   1 and 2
D)   1, 2, and 3

Question 5

Which of the following will result in the lowest patient dose?

Accepted Answer

A)   Low kVp and high mAs
B)   High kVp and low mAs
C)   How kVp and long exposure time
D)   Long exposure time and short SID

Question 6

X-rays are a type of:

Accepted Answer

A)   electricity.
B)   microwave.
C)   kinetic energy.
D)   electromagnetic energy.

Question 7

The effective dose limit for whole-body radiation in 1 year for a nonpregnant radiation worker over the age of 18 is:

Accepted Answer

A)   5 millirem.
B)   0.5 rem.
C)   5 rem.
D)   50 rem.

Question 8

What is a TLD?

Accepted Answer

A)   A radiation unit that is determined by measuring ionization of air
B)   A device containing a crystal that absorbs radiation energy and discharges it in the form of light when heated
C)   A factor that quantifies the relative health risks of various types of radiation
D)   A radiation unit used to measure patient dose

Question 9

Which of the following formulas represents the relationship between the wavelength,frequency,and velocity of an electromagnetic wave?

Accepted Answer

A)   
B)   
C)   
D)

Question 10

In order to increase the penetration of the x-ray beam,which of the following factors should be increased?

Accepted Answer

A)   Kilovoltage
B)   Milliamperage
C)   mAs
D)   Exposure time

Question 11

What is a rad?

Accepted Answer

A)   A radiation unit that is determined by measuring ionization of air
B)   A factor that quantifies the relative health risks of various types of radiation
C)   A radiation unit used to measure patient dose
D)   A radiation unit used to measure dose equivalents for occupational exposure

Question 12

What is a rem?

Accepted Answer

A)   A radiation unit that is determined by measuring ionization of air
B)   A device containing a crystal that absorbs radiation energy and discharges it in the form of light when heated
C)   A factor that quantifies the relative health risks of various types of radiation
D)   A radiation unit used to measure dose equivalents for occupational exposure

Question 13

A device used to control the size of the radiation field is a:

Accepted Answer

A)   collimator.
B)   tube housing.
C)   detent.
D)   filter.

Question 14

The current across the x-ray tube is measured in units of:

Accepted Answer

A)   milliamperes.
B)   kilovolts.
C)   rads.
D)   roentgens.

Question 15

What is meant by WF?

Accepted Answer

A)   A device containing a crystal that absorbs radiation energy and discharges it in the form of light when heated
B)   A factor that quantifies the relative health risks of various types of radiation
C)   A radiation unit used to measure patient dose
D)   A radiation unit used to measure dose equivalents for occupational exposure

Question 16

What is an Sv?

Accepted Answer

A)   A radiation unit that is determined by measuring ionization of air
B)   A device containing a crystal that absorbs radiation energy and discharges it in the form of light when heated
C)   A radiation unit used to measure patient dose
D)   A radiation unit used to measure dose equivalents for occupational exposure

Question 17

An x-ray machine designed for direct viewing of the x-ray image is called a(n):

Accepted Answer

A)   image receptor.
B)   transformer.
C)   control console.
D)   fluoroscope.

Question 18

Which of the following is NOT an accurate statement regarding the characteristics of x-rays?

Accepted Answer

A)   They can penetrate matter that is impenetrable to light.
B)   They cause certain crystals to fluoresce.
C)   They can be refracted by a lens.
D)   They cannot be detected by the human senses.

Question 19

The primary purpose of intensifying screens is to:

Accepted Answer

A)   protect the film from light and damage during radiography.
B)   improve the definition on the radiograph.
C)   reduce the quantity of radiation required to produce a satisfactory image.
D)   reduce the possibility of artifacts on the film.

Question 20

Which of the following statements best describes the current knowledge regarding the effects of exposure to low doses (<20 rad)of ionizing radiation?

Accepted Answer

A)   It causes cancer after a certain amount of radiation has been received.
B)   Depression of the white blood cell count is followed by acute gastrointestinal distress.
C)   Birth defects will occur if the patient is pregnant.
D)   There is increased risk of cancer, leukemia, birth defects, and cataracts.

Exam 1: Introduction to Radiography