RADIOGRAPHY 10TH EDITION BY
EHRLICH
, Patient Care in Radiography 9th Edition Ehrlich Test Bank
Page 1 of 93
Chapter 01: Introduction to Radiography
Ehrlich: Patient Care in Radiography
MULTIPLE CHOICE
1. X-rays were discovered in 1895 by:
a. Coolidge.
b. Crookes.
c. Roentgen.
d. Edison.
ANS: C REF: p. 2 OBJ: 1
2. Of the following types of electromagnetic energy, which has the shortest wavelength?
a. Radio waves
b. X-rays
c. Visible light
d. Ultraviolet light
ANS: B REF: p. 7 OBJ: 7
3. Which of the following is NOT an accurate statement regarding the characteristics of x-rays?
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 N RShuman
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ANS: C REF: pp. 7-8 OBJ: 8
4. An electron cloud surrounding a hot cathode is referred to as a(n):
a. focusing cup.
b. ampere.
c. space charge.
d. filament.
ANS: C REF: p. 6 OBJ: 6
5. The purpose of rotating the x-ray tube target is to:
a. create a space charge.
b. remove long-wavelength photons from the x-ray beam.
c. focus the electron stream on a small target area.
d. increase the heat capacity of the anode.
ANS: D REF: p. 9 OBJ: 6
6. An imaginary photon that is emitted from the center of the focal spot, perpendicular to the
long axis of the x-ray tube, is called the:
a. electron stream.
b. x-ray beam.
c. central ray.
, Patient Care in Radiography 9th Edition Ehrlich Test Bank
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d. radiation field.
ANS: C REF: p. 8 OBJ: 10
7. A device used to control the size of the radiation field is a:
a. collimator.
b. detent.
c. tube housing.
d. filter.
ANS: A REF: p. 8 OBJ: 11
8. The function of an x-ray grid is to:
a. decrease patient radiation dose.
b. increase radiographic resolution.
c. increase radiographic contrast by reducing scatter radiation fog.
d. increase radiographic density.
ANS: C REF: p. 14 OBJ: 11
9. The majority of radiography education programs today are based in:
a. proprietary schools.
b. hospitals.
c. clinics.
d. colleges.
ANS: D REF: p. 4 OBJ: 3
10. The container for the vacuumNof
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SIx-ray
NGTtube
B.Cis OM of:
made
a. glass.
b. aluminum.
c. tungsten.
d. carbon.
ANS: A REF: p. 5 OBJ: 4
11. X-rays are a type of:
a. electricity.
b. microwave.
c. kinetic energy.
d. electromagnetic energy.
ANS: D REF: p. 6 OBJ: 7
12. The frequency of an electromagnetic sine wave is defined as:
a. the distance from trough to crest.
b. the distance from one crest to the next.
c. the number of times per second that a crest passes a given point.
d. the velocity at which the wave travels through space.
ANS: C REF: p. 6 OBJ: 9
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, Patient Care in Radiography 9th Edition Ehrlich Test Bank
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13. Which of the following formulas represents the relationship between the wavelength,
frequency, and velocity of an electromagnetic wave?
a. f = λ v
b. V = λ f
c. Λ = f ÷ v
d. f = λ ÷ v
ANS: B REF: p. 6 OBJ: 9
14. Which of the following substances is most readily penetrated by x-rays?
a. Water
b. Air
c. Bone
d. Fat
ANS: B REF: p. 7 OBJ: 8
15. Grids or buckys are generally used for body parts that measure greater than:
a. 2 to 4 cm.
b. 10 to 12 cm.
c. 18 to 20 cm.
d. 30 cm.
ANS: B REF: p. 15 OBJ: 11
16. The access point for the radiographer to determine the exposure factors and to initiate the
exposure is called the:
a. transformer. NURSINGTB.COM
b. image receptor unit.
c. control console.
d. stationary grid.
ANS: C REF: p. 16 OBJ: 11
17. An x-ray machine designed for direct viewing of the x-ray image is called a(n):
a. image receptor.
b. transformer.
c. control console.
d. fluoroscope.
ANS: D REF: p. 17 OBJ: 11
18. A device located between the x-ray tube and the control panel that increases the voltage
delivered from the power company is called a:
a. collimator.
b. transformer.
c. control console.
d. fluoroscope.
ANS: B REF: p. 16 OBJ: 11
19. The anode or positive end of the x-ray tube is the end that contains the:
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