Question 1

Copper is used in the rotating anode because

Accepted Answer

A)   it is an excellent conductor
B)   it is an excellent insulator
C)   it has a high atomic number
D)   it has a low atomic numberE) A) and D)
F) B) and C)

Question 2

The effective focal spot is the

Accepted Answer

A)   same as the actual focal spot
B)   actual area where the electrons hit the target
C)   actual size of the origin of the x-ray beam
D)   origin of the x-ray beam as seen from below the tubeE) A) and B)
F) A) and C)

Question 3

The rotor is supplied with electric current through the x-ray circuit.

Accepted Answer

A) True 
 B)False

Question 4

The portion of the induction motor that is made of electromagnets that are energized in opposing pairs and induce an electric current with associated magnetic field is the

Accepted Answer

A)   rotor
B)   stator
C)   disc
D)   bearingsE) B) and D)
F) A) and B)

Question 5

One of the reasons that molybdenum is used in rotating anodes is because it is

Accepted Answer

A)   light but strong
B)   heavy but strong
C)   dense but strong
D)   an excellent conductorE) C) and D)
F) A) and C)

Question 6

Molybdenum

Accepted Answer

A)   is an excellent conductor of electricity
B)   is a poor conductor of electricity
C)   is an excellent thermal conductor
D)   is a poor thermal conductorE) B) and C)
F) A) and B)

Question 7

Which of the following helps to keep the x-ray tube cool on the inside of the protective housing?

Accepted Answer

A)   Cooling fans
B)   Oil bath
C)   Target window
D)   Cooling fans and an oil bathE) A) and C)
F) B) and D) D

Question 8

Prior to the introduction of protective circuits, ______________ were used to determine if a particular combination of exposure factors was safe or unsafe for a given x-ray tube.

Accepted Answer

A)   tube cooling charts
B)   tube rating charts
C)   technique charts
D)   QC chartsE) A) and B)
F) A) and C)

Question 9

The anode includes the

Accepted Answer

A)   target
B)   induction motor
C)   envelope
D)   target and induction motorE) A) and D)
F) A) and C)

Question 10

The rotor is made of

Accepted Answer

A)   an iron core
B)   a molybdenum core
C)   tungsten
D)   rheniumE) B) and D)
F) B) and C)

Question 11

Which of the following occurs first during x-ray production?

Accepted Answer

A)   Voltage is transformed to kilovoltage.
B)   Kilovoltage is applied to anode and cathode.
C)   Alternating current is changed to direct current.
D)   Voltage level is adjusted at autotransformer.E) B) and C)
F) A) and B) D

Question 12

Heat from x-ray production is removed through convection by the heat traveling from

Accepted Answer

A)   the tube into the room by cooling fans
B)   the tube to heat tolerant materials
C)   the tube to the oil bath
D)   none of theseE) C) and D)
F) B) and D)

Question 13

The focusing cup is able to keep the electrons together because

Accepted Answer

A)   opposite charges repel
B)   opposite charges attract
C)   like charges repel
D)   like charges attractE) All of the above
F) B) and C)

Question 14

To take advantage of the anode heel effect, the thinner part of the anatomy being imaged should be placed under the cathode end of the tube.

Accepted Answer

A) True 
 B)False

Question 15

The target window is usually approximately

Accepted Answer

A)   1 mm2
B)   5 mm2
C)   1 cm2
D)   5 cm2E) B) and C)
F) C) and D)

Question 16

The purpose of the focusing cup is to

Accepted Answer

A)   produce thermionic emission from the filament
B)   prevent thermionic emission from the filament
C)   allow the electrons to spread out
D)   keep the electrons togetherE) A) and D)
F) C) and D)

Question 17

The filament is primarily made of

Accepted Answer

A)   rhenium
B)   copper
C)   molybdenum
D)   tungstenE) None of the above
F) A) and D)

Question 18

Which of the following practices extend tube life?

Accepted Answer

A)   Warm up the tube as appropriate.
B)   Press the prep and exposure switches at almost the same time.
C)   Avoid using very high exposures or long exposure times.
D)   All of these.E) None of the above
F) A) and D)

Question 19

The primary purpose of the glass or metal enclosure is to

Accepted Answer

A)   insulate against electrical shock
B)   maintain a vacuum within the tube
C)   allow the heat to dissipate
D)   none of theseE) B) and C)
F) None of the above B

Question 20

The negative end of the x-ray tube is the

Accepted Answer

A)   anode
B)   cathode
C)   target
D)   envelopeE) A) and C)
F) A) and D)

Exam 5: The X-Ray Tube

Copper is used in the rotating anode because

Correct AnswerverifiedShow Answer

The effective focal spot is the

Correct AnswerverifiedShow Answer

The rotor is supplied with electric current through the x-ray circuit.

Correct AnswerverifiedShow Answer

The portion of the induction motor that is made of electromagnets that are energized in opposing pairs and induce an electric current with associated magnetic field is the

Correct AnswerverifiedShow Answer

One of the reasons that molybdenum is used in rotating anodes is because it is

Correct AnswerverifiedShow Answer

Molybdenum

Correct AnswerverifiedShow Answer

Which of the following helps to keep the x-ray tube cool on the inside of the protective housing?

Correct AnswerverifiedD

Prior to the introduction of protective circuits, ______________ were used to determine if a particular combination of exposure factors was safe or unsafe for a given x-ray tube.

Correct AnswerverifiedShow Answer

The anode includes the

Correct AnswerverifiedShow Answer

The rotor is made of

Correct AnswerverifiedShow Answer

Which of the following occurs first during x-ray production?

Correct AnswerverifiedD

Heat from x-ray production is removed through convection by the heat traveling from

Correct AnswerverifiedShow Answer

The focusing cup is able to keep the electrons together because

Correct AnswerverifiedShow Answer

To take advantage of the anode heel effect, the thinner part of the anatomy being imaged should be placed under the cathode end of the tube.

Correct AnswerverifiedShow Answer

The target window is usually approximately

Correct AnswerverifiedShow Answer

The purpose of the focusing cup is to

Correct AnswerverifiedShow Answer

The filament is primarily made of

Correct AnswerverifiedShow Answer

Which of the following practices extend tube life?

Correct AnswerverifiedShow Answer

The primary purpose of the glass or metal enclosure is to

Correct AnswerverifiedB

The negative end of the x-ray tube is the

Correct AnswerverifiedShow Answer

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D

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D

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B

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