Question 1

When using automatic exposure control (AEC)for setting exposure techniques,which technical factor does not have to be set?

Accepted Answer

A)  mA 
B)  mAs 
C)  kVp 
D)  Exposure time 
A)  mA 
B)  mAs 
C)  kVp 
D)  Exposure time D

Question 2

The x-ray tube capacity for a single exposure can be determined by consulting the:

Accepted Answer

A)  tube rating chart. 
B)  generator manual. 
C)  kVp maximum setting. 
D)  mA maximum setting. 
A)  tube rating chart. 
B)  generator manual. 
C)  kVp maximum setting. 
D)  mA maximum setting. A

Question 3

How many x-ray exposures should be made to warm up the x-ray tube?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4 C

Question 4

Which of the following is the function of the autotransformer?
1) Provides the means for variable kVp selection
2) Provides compensation for fluctuations in the incoming line voltage
3) Supplies power to the other parts of the x-ray circuit

Accepted Answer

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

Question 5

Which of the following is located on the low-voltage side of the x-ray circuit and functions to measure the voltage output from the autotransformer?

Accepted Answer

A)  Exposure timer 
B)  Step-down transformer 
C)  Step-up transformer 
D)  Rectifier 
A)  Exposure timer 
B)  Step-down transformer 
C)  Step-up transformer 
D)  Rectifier

Question 6

What is the purpose of the filament circuit?

Accepted Answer

A)  Supplies the heat required by the x-ray tube filament for thermionic emission of electrons 
B)  Provides the incoming power to the x-ray tube 
C)  Varies and stabilizes the incoming power to the high-voltage side of the x-ray circuit 
D)  Varies the voltage to the primary side of the step-up transformer 
A)  Supplies the heat required by the x-ray tube filament for thermionic emission of electrons 
B)  Provides the incoming power to the x-ray tube 
C)  Varies and stabilizes the incoming power to the high-voltage side of the x-ray circuit 
D)  Varies the voltage to the primary side of the step-up transformer

Question 7

In which circuit is the step-up transformer located?

Accepted Answer

A)  Incoming 
B)  Filament 
C)  Low-voltage 
D)  High-voltage 
A)  Incoming 
B)  Filament 
C)  Low-voltage 
D)  High-voltage

Question 8

Which of the following x-ray generators produces the greatest amount of x-rays for the same exposure technique?

Accepted Answer

A)  1-phase 
B)  3-phase, 6-pulse 
C)  3-phase, 12-pulse 
D)  High-frequency 
A)  1-phase 
B)  3-phase, 6-pulse 
C)  3-phase, 12-pulse 
D)  High-frequency

Question 9

X-ray exposure times that can be set on the generator can go up to as high as ____ sec.

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  8 
A)  4 
B)  5 
C)  6 
D)  8

Question 10

Which of the following transformers reduces the voltage on the secondary side to provide an appropriate current to heat the filament?

Accepted Answer

A)  Autotransformer 
B)  Step-down transformer 
C)  Step-up transformer 
D)  mA meter 
A)  Autotransformer 
B)  Step-down transformer 
C)  Step-up transformer 
D)  mA meter

Question 11

Which of the following must be absolutely accurate when using AEC for exposure technique?

Accepted Answer

A)  Setting the central ray 
B)  Patient positioning 
C)  Collimation size 
D)  Determining the correct kVp 
A)  Setting the central ray 
B)  Patient positioning 
C)  Collimation size 
D)  Determining the correct kVp

Question 12

Which of the following is the formula to calculate the heat produced by an exposure made on a three-phase generator?

Accepted Answer

A)  mA × time (sec) × kVp 
B)  mA × time (sec) × 1.10 
C)  mA × time (sec) × 1.35 
D)  mA × time (sec) × 1.40 
A)  mA × time (sec) × kVp 
B)  mA × time (sec) × 1.10 
C)  mA × time (sec) × 1.35 
D)  mA × time (sec) × 1.40

Question 13

Which of the following components are located on the low-voltage side of the x-ray circuit?
1) kVp selector
2) Autotransformer
3) Step-up transformer

Accepted Answer

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

Question 14

The process of causing alternating (A-C)current to flow in one direction (D-C)only is called:

Accepted Answer

A)  rectification. 
B)  induction. 
C)  grounding. 
D)  compensation. 
A)  rectification. 
B)  induction. 
C)  grounding. 
D)  compensation.

Question 15

Which type of exposure timer is capable of shorter exposure times (1 msec or less)?

Accepted Answer

A)  Synchronous timer 
B)  Electronic timer 
C)  Manual timer 
D)  Back-up timer 
A)  Synchronous timer 
B)  Electronic timer 
C)  Manual timer 
D)  Back-up timer

Question 16

Every x-ray exposure that is made will have what technical factors set on the control panel?
1) mA
2) kVp
3) Exposure time

Accepted Answer

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

Question 17

In a high-frequency generator,the incoming 60 Hz electrical frequency is raised to what level?

Accepted Answer

A)  2,500 Hz 
B)  5,000 Hz 
C)  6,000 Hz 
D)  8,000 Hz 
A)  2,500 Hz 
B)  5,000 Hz 
C)  6,000 Hz 
D)  8,000 Hz

Question 18

For which exposure technique system would a technique chart not be necessary?

Accepted Answer

A)  Density control 
B)  AEC 
C)  APR 
D)  Manual techniques 
A)  Density control 
B)  AEC 
C)  APR 
D)  Manual techniques

Question 19

A series of warm-up exposures is made on a cold x-ray tube to:

Accepted Answer

A)  heat the filament. 
B)  prevent damage to the anode from sudden heating. 
C)  bring the anode rotor up to speed. 
D)  check that the machine is working properly. 
A)  heat the filament. 
B)  prevent damage to the anode from sudden heating. 
C)  bring the anode rotor up to speed. 
D)  check that the machine is working properly.

Question 20

Which of the following x-ray generators will produce the greatest amount of heat for the same exposure technique?

Accepted Answer

A)  1-phase 
B)  3-phase 
C)  3-phase, 12-pulse 
D)  High-frequency 
A)  1-phase 
B)  3-phase 
C)  3-phase, 12-pulse 
D)  High-frequency

Exam 6: X-Ray Circuit and Tube Heat Management

When using automatic exposure control (AEC)for setting exposure techniques,which technical factor does not have to be set?

The x-ray tube capacity for a single exposure can be determined by consulting the:

How many x-ray exposures should be made to warm up the x-ray tube?

Which of the following is the function of the autotransformer? 1) Provides the means for variable kVp selection 2) Provides compensation for fluctuations in the incoming line voltage 3) Supplies power to the other parts of the x-ray circuit

Which of the following is located on the low-voltage side of the x-ray circuit and functions to measure the voltage output from the autotransformer?

What is the purpose of the filament circuit?

In which circuit is the step-up transformer located?

Which of the following x-ray generators produces the greatest amount of x-rays for the same exposure technique?

X-ray exposure times that can be set on the generator can go up to as high as ____ sec.

Which of the following transformers reduces the voltage on the secondary side to provide an appropriate current to heat the filament?

Which of the following must be absolutely accurate when using AEC for exposure technique?

Which of the following is the formula to calculate the heat produced by an exposure made on a three-phase generator?

Which of the following components are located on the low-voltage side of the x-ray circuit? 1) kVp selector 2) Autotransformer 3) Step-up transformer

The process of causing alternating (A-C)current to flow in one direction (D-C)only is called:

Which type of exposure timer is capable of shorter exposure times (1 msec or less)?

Every x-ray exposure that is made will have what technical factors set on the control panel? 1) mA 2) kVp 3) Exposure time

In a high-frequency generator,the incoming 60 Hz electrical frequency is raised to what level?

For which exposure technique system would a technique chart not be necessary?

A series of warm-up exposures is made on a cold x-ray tube to:

Which of the following x-ray generators will produce the greatest amount of heat for the same exposure technique?

Role of the Limited X-Ray Machine Operator

Introduction to Radiographic Equipment

Basic Mathematics for Limited Operators

Basic Physics of Radiography

X-Ray Production

Principles of Exposure and Image Quality

Digital Image Receptor Systems

Scatter Radiation and Its Control

Formulating X-Ray Techniques

Radiobiology and Radiation Safety

Introduction to Anatomy, positioning, and Pathology

Upper Extremity and Shoulder Girdle

Lower Extremity and Pelvis

Spine

Bony Thorax, Chest, and Abdomen

Skull, Facial Bones, and Paranasal Sinuses

Radiography of Pediatric and Geriatric Patients

Image Evaluation

Ethics, Legal Considerations, and Professionalism

Safety and Infection Control

Assessing Patients and Managing Acute Situations

Medications and Their Administration

Medical Laboratory Skills

Additional Procedures for Assessment and Diagnosis

Bone Densitometry

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