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TEST BANK
,Radiographic Imaging and Exposure 4th Edition Fauber Test Bank
Fauber: Radiographic Imaging and Exposure, 4th Edition
Chapter 02: The X-ray Beam
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MULTIPLE CHOICE
1. The _____ is the portion of the x-ray tube that contains the filament.
a. Cathode
b. Anode
c. Rotor
d. Rotating disk
ANS: A
The filament, the source of electrons during x-ray production, is located in the cathode.
REF: 13 OBJ: 3
2. The filament is made of:
a. Tungsten
b. Rhenium
c. Molybdenum
d. Lead
ANS: A
The cathode filament is made of tungsten.
REF: 13 OBJ: 3
3. The focusing cup:
a. Surrounds the anode
b. Has a positive charge
c. Has a negative charge
d. Focuses the x-ray beam
ANS: C
The focusing cup, surrounding the filament on three sides, has a negative charge, keeping the
negatively charged electrons focused.
REF: 14 OBJ: 3
4. _____ is the phenomenon that occurs around the filament during thermionic emission and prevents
the further escape of electrons from the filament.
a. Saturation current
b. Space charge effect
c. mA rectification
d. Line focus principle
ANS: B
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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The space charge effect limits the number of electrons in the space charge by preventing additional
electrons from being boiled off the filament.
REF: 21 OBJ: 5
5. The positive side of the x-ray tube is the:
a. Anode
b. Cathode
c. Window
d. Stream of electrons
ANS: A
The anode is the positive side of the x-ray tube, and the cathode is the negative.
REF: 14 OBJ: 3
6. The maximum speed the rotating anode will typically achieve is _____ rpm.
a. 3200
b. 5000
c. 10,000
d. 20,000
ANS: C
Rotating anodes rotate at a set speed ranging from 3000 to 10,000 revolutions per minute (rpm).
REF: 14 OBJ: 3
7. What is the base material of the anode disc?
a. Molybdenum
b. Tungsten
c. Rhenium
d. Beryllium
ANS: A
The base of the rotating anode disc is made of molybdenum, along with a graphite layer.
REF: 14 OBJ: 3
8. What is the name of the exact area on the anode that is struck by the electron stream?
a. Focal spot
b. Focal point
c. Focal range
d. Any of the above
ANS: A
The focal spot is the exact area on the focal track of the anode target where electrons strike.
REF: 16 OBJ: 3
9. What is the name of the device in a rotating anode x-ray tube that turns the rotor?
a. Stator
b. Rotor
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
, Test Bank 2-3
c. Focusing cup
d. Rheostat
ANS: A
Located outside the envelope of the x-ray tube, the stator is an electric motor that turns the rotor.
REF: 15 OBJ: 4
10. Effective compensation for the anode heel effect would involve positioning:
a. the thinnest portion of the part under the anode
b. The thickest portion of the part under the anode
c. The thinnest portion of the part under the cathode
d. B and C
ANS: A
The thinnest portion of a part should be placed under the anode, because the more intense x-rays are
emitted toward the cathode end of the tube, where the thickest part should be placed.
REF: 32-33 OBJ: 8
11. What is an acceptable level of leakage from the tube housing?
a. 100 mR per hour, measured 6 feet away
b. 10 mR per hour, measured 1 foot away
c. 1000 R per hour, measured at a distance of 4 meters
d. 100 mR per hour, measured at a distance of 1 meter
ANS: D
The maximum amount of leakage radiation from an x-ray tube is 100 mR per hour when measured
at a distance of 1 meter.
REF: 17 OBJ: 3
12. Which of the following could be defined as the production of an x-ray photon by the electrostatic
attraction between the incident electron and the nucleus of the tungsten atom?
a. Photoelectric interaction
b. Bremmstrahlung interaction
c. Characteristic interaction
d. Pair production interaction
ANS: B
Production of an x-ray photon as a result of a slowing down of the incoming electron due to the
electrostatic force of the nucleus is due to a bremsstrahlung interaction.
REF: 18 OBJ: 5
13. Which of the following could be defined as the production of an x-ray photon by a collision
between the incident electron and a K-shell electron of the tungsten atom?
a. Photoelectric interaction
b. Bremsstrahlung interaction
c. Characteristic interaction
d. Pair production interaction
ANS: C
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
TEST BANK
,Radiographic Imaging and Exposure 4th Edition Fauber Test Bank
Fauber: Radiographic Imaging and Exposure, 4th Edition
Chapter 02: The X-ray Beam
Test Bank
MULTIPLE CHOICE
1. The _____ is the portion of the x-ray tube that contains the filament.
a. Cathode
b. Anode
c. Rotor
d. Rotating disk
ANS: A
The filament, the source of electrons during x-ray production, is located in the cathode.
REF: 13 OBJ: 3
2. The filament is made of:
a. Tungsten
b. Rhenium
c. Molybdenum
d. Lead
ANS: A
The cathode filament is made of tungsten.
REF: 13 OBJ: 3
3. The focusing cup:
a. Surrounds the anode
b. Has a positive charge
c. Has a negative charge
d. Focuses the x-ray beam
ANS: C
The focusing cup, surrounding the filament on three sides, has a negative charge, keeping the
negatively charged electrons focused.
REF: 14 OBJ: 3
4. _____ is the phenomenon that occurs around the filament during thermionic emission and prevents
the further escape of electrons from the filament.
a. Saturation current
b. Space charge effect
c. mA rectification
d. Line focus principle
ANS: B
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
Visit TestBankDeal.com to get complete for all chapters
, Test Bank 2-2
The space charge effect limits the number of electrons in the space charge by preventing additional
electrons from being boiled off the filament.
REF: 21 OBJ: 5
5. The positive side of the x-ray tube is the:
a. Anode
b. Cathode
c. Window
d. Stream of electrons
ANS: A
The anode is the positive side of the x-ray tube, and the cathode is the negative.
REF: 14 OBJ: 3
6. The maximum speed the rotating anode will typically achieve is _____ rpm.
a. 3200
b. 5000
c. 10,000
d. 20,000
ANS: C
Rotating anodes rotate at a set speed ranging from 3000 to 10,000 revolutions per minute (rpm).
REF: 14 OBJ: 3
7. What is the base material of the anode disc?
a. Molybdenum
b. Tungsten
c. Rhenium
d. Beryllium
ANS: A
The base of the rotating anode disc is made of molybdenum, along with a graphite layer.
REF: 14 OBJ: 3
8. What is the name of the exact area on the anode that is struck by the electron stream?
a. Focal spot
b. Focal point
c. Focal range
d. Any of the above
ANS: A
The focal spot is the exact area on the focal track of the anode target where electrons strike.
REF: 16 OBJ: 3
9. What is the name of the device in a rotating anode x-ray tube that turns the rotor?
a. Stator
b. Rotor
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
, Test Bank 2-3
c. Focusing cup
d. Rheostat
ANS: A
Located outside the envelope of the x-ray tube, the stator is an electric motor that turns the rotor.
REF: 15 OBJ: 4
10. Effective compensation for the anode heel effect would involve positioning:
a. the thinnest portion of the part under the anode
b. The thickest portion of the part under the anode
c. The thinnest portion of the part under the cathode
d. B and C
ANS: A
The thinnest portion of a part should be placed under the anode, because the more intense x-rays are
emitted toward the cathode end of the tube, where the thickest part should be placed.
REF: 32-33 OBJ: 8
11. What is an acceptable level of leakage from the tube housing?
a. 100 mR per hour, measured 6 feet away
b. 10 mR per hour, measured 1 foot away
c. 1000 R per hour, measured at a distance of 4 meters
d. 100 mR per hour, measured at a distance of 1 meter
ANS: D
The maximum amount of leakage radiation from an x-ray tube is 100 mR per hour when measured
at a distance of 1 meter.
REF: 17 OBJ: 3
12. Which of the following could be defined as the production of an x-ray photon by the electrostatic
attraction between the incident electron and the nucleus of the tungsten atom?
a. Photoelectric interaction
b. Bremmstrahlung interaction
c. Characteristic interaction
d. Pair production interaction
ANS: B
Production of an x-ray photon as a result of a slowing down of the incoming electron due to the
electrostatic force of the nucleus is due to a bremsstrahlung interaction.
REF: 18 OBJ: 5
13. Which of the following could be defined as the production of an x-ray photon by a collision
between the incident electron and a K-shell electron of the tungsten atom?
a. Photoelectric interaction
b. Bremsstrahlung interaction
c. Characteristic interaction
d. Pair production interaction
ANS: C
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
