Question 1

A satisfactory image is made using 200 mA and 0.05 sec. Which of the following exposures will produce a similar radiographic density?

Accepted Answer

A)  400 mA and 1/40 sec 
B)  400 mA and 0.1 sec 
C)  400 mA and 0.01 sec 
D)  400 mA and 1/20 sec 
A)  400 mA and 1/40 sec 
B)  400 mA and 0.1 sec 
C)  400 mA and 0.01 sec 
D)  400 mA and 1/20 sec A

Question 2

A satisfactory lateral lumbar spine radiograph is taken using 200 mA,0.6 sec,94 kVp,and 40 inches SID. If an increase in SID to 60 inches is desired,which of the following technique changes will produce a radiographic density most similar to the original?

Accepted Answer

A)  200 mA, 0.25 sec, 94 kVp 
B)  200 mA, 1.33 sec, 94 kVp 
C)  400 mA, 1.33 sec, 94 kVp 
D)  200 mA, 1.33 sec, 108 kVp 
A)  200 mA, 0.25 sec, 94 kVp 
B)  200 mA, 1.33 sec, 94 kVp 
C)  400 mA, 1.33 sec, 94 kVp 
D)  200 mA, 1.33 sec, 108 kVp B

Question 3

When the SID is doubled,the intensity of the radiation in the radiation field is:

Accepted Answer

A)  doubled. 
B)  halved. 
C)  quadrupled. 
D)  reduced by a factor of 4. 
A)  doubled. 
B)  halved. 
C)  quadrupled. 
D)  reduced by a factor of 4. D

Question 4

A satisfactory AP lumbar spine radiograph is made using 200 mA,0.25 sec,78 kVp,and 40-inch SID. Which of the following technique changes will produce a radiograph of similar density while providing less contrast and less exposure to the patient?

Accepted Answer

A)  200 mA, 0.12 sec, 90 kVp, 40-inch SID 
B)  200 mA, 0.20 sec, 78 kVp, 36-inch SID 
C)  400 mA, 0.12 sec, 78 kVp, 40-inch SID 
D)  100 mA, 0.25 sec, 78 kVp, 40-inch SID 
A)  200 mA, 0.12 sec, 90 kVp, 40-inch SID 
B)  200 mA, 0.20 sec, 78 kVp, 36-inch SID 
C)  400 mA, 0.12 sec, 78 kVp, 40-inch SID 
D)  100 mA, 0.25 sec, 78 kVp, 40-inch SID

Question 5

If a satisfactory AP shoulder radiograph is made on a patient measuring 12 cm using 100 mA,0.15 sec,70 kVp,and 40 inches SID,which of the following techniques will provide the most similar radiograph of a patient whose shoulder measures 16 cm?

Accepted Answer

A)  100 mA, 0.20 sec, 70 kVp, 40 inches SID 
B)  100 mA, 0.25 sec, 70 kVp, 40 inches SID 
C)  100 mA, 0.25 sec, 78 kVp, 40 inches SID 
D)  300 mA, 0.15 sec, 70 kVp, 40 inches SID 
A)  100 mA, 0.20 sec, 70 kVp, 40 inches SID 
B)  100 mA, 0.25 sec, 70 kVp, 40 inches SID 
C)  100 mA, 0.25 sec, 78 kVp, 40 inches SID 
D)  300 mA, 0.15 sec, 70 kVp, 40 inches SID

Question 6

An x-ray exposure is made using the following factors: 300 mA,0.02 sec,60 kVp,60-inch SID,and the large focal spot. In this case,the value of the mAs is:

Accepted Answer

A)  0.06. 
B)  0.6. 
C)  6. 
D)  60. 
A)  0.06. 
B)  0.6. 
C)  6. 
D)  60.

Question 7

Which of the following is equivalent to 0.25 seconds?

Accepted Answer

A)  250 milliseconds 
B)  25 milliseconds 
C)  2.5 milliseconds 
D)  0.025 milliseconds 
A)  250 milliseconds 
B)  25 milliseconds 
C)  2.5 milliseconds 
D)  0.025 milliseconds

Question 8

What is a numerator?

Accepted Answer

A)  The answer to a multiplication problem 
B)  The answer to a division problem 
C)  The bottom or lower number of a fraction 
D)  The upper or top number of a fraction 
A)  The answer to a multiplication problem 
B)  The answer to a division problem 
C)  The bottom or lower number of a fraction 
D)  The upper or top number of a fraction

Question 9

Which of the following is an exponential expression of 100,000 as a power of 10?

Accepted Answer

A)  103 
B)  1002 
C)  105 
D)  106 
A)  103 
B)  1002 
C)  105 
D)  106

Question 10

In a continuing education course,you learn that approximately 85% of limited operators who have practiced for 5 or more years suffer from low-back pain. What does this number mean?

Accepted Answer

A)  Of the total number of limited operators, 85 suffer from low-back pain. 
B)  Of every 100 limited operators, 85 suffer from low-back pain. 
C)  Every 5 years, 85 limited operators suffer from low-back pain. 
D)  Being a limited operator is very unhealthy. 
A)  Of the total number of limited operators, 85 suffer from low-back pain. 
B)  Of every 100 limited operators, 85 suffer from low-back pain. 
C)  Every 5 years, 85 limited operators suffer from low-back pain. 
D)  Being a limited operator is very unhealthy.

Question 11

A fraction in which the top number is larger than the bottom number is called a(n)_____ fraction.

Accepted Answer

A)  proper 
B)  unnatural 
C)  improper 
D)  unconverted 
A)  proper 
B)  unnatural 
C)  improper 
D)  unconverted

Question 12

A satisfactory radiograph is made using 200 mA,0.3 sec,90 kVp,and 72-inch SID. Which of the following techniques will produce a similar result at 40 inches SID?

Accepted Answer

A)  200 mA, 0.9 sec, 90 kVp 
B)  200 mA, 0.09 sec, 90 kVp 
C)  200 mA, 0.54 sec, 90 kVp 
D)  200 mA, 0.16 sec, 90 kVp 
A)  200 mA, 0.9 sec, 90 kVp 
B)  200 mA, 0.09 sec, 90 kVp 
C)  200 mA, 0.54 sec, 90 kVp 
D)  200 mA, 0.16 sec, 90 kVp

Question 13

What is the mAs when 400 mA is used with a 50-millisecond exposure time?

Accepted Answer

A)  20 
B)  200 
C)  2 
D)  2000 
A)  20 
B)  200 
C)  2 
D)  2000

Question 14

Which of the following is equivalent to 30 milliseconds?

Accepted Answer

A)  $ \frac{1}{1000} $ of a second 
B)  0.30 seconds 
C)  0.03 seconds 
D)  $ \frac{1}{30} $ of a second 
A)  $ \frac{1}{1000} $ of a second 
B)  0.30 seconds 
C)  0.03 seconds 
D)  $ \frac{1}{30} $ of a second

Question 15

What is a denominator?

Accepted Answer

A)  The bottom or lower number of a fraction 
B)  The upper or top number of a fraction 
C)  The number divided into in a division problem 
D)  The answer to a division problem 
A)  The bottom or lower number of a fraction 
B)  The upper or top number of a fraction 
C)  The number divided into in a division problem 
D)  The answer to a division problem

Question 16

The lower or bottom number of a fraction is called a:

Accepted Answer

A)  portion. 
B)  numerator. 
C)  fractionator. 
D)  denominator. 
A)  portion. 
B)  numerator. 
C)  fractionator. 
D)  denominator.

Question 17

What is the decimal form oF $ \frac{1}{1000} $ second?

Accepted Answer

A)  0.1 
B)  0.01 
C)  0.001 
D)  1.000 
A)  0.1 
B)  0.01 
C)  0.001 
D)  1.000

Question 18

A satisfactory radiograph is made using 100 mA,0.2 sec,80 kVp,and 40-inch SID. How much exposure time is required to produce a similar radiograph when using 400 mA?

Accepted Answer

A)  0.05 sec 
B)  0.08 sec 
C)  0.1 sec 
D)  0.4 sec 
A)  0.05 sec 
B)  0.08 sec 
C)  0.1 sec 
D)  0.4 sec

Question 19

What is required to add or subtract fractions?

Accepted Answer

A)  Common numerator 
B)  Common quotient 
C)  Common dividend 
D)  Common denominator 
A)  Common numerator 
B)  Common quotient 
C)  Common dividend 
D)  Common denominator

Question 20

The upper or top number of a fraction is called a:

Accepted Answer

A)  portion. 
B)  denominator. 
C)  fractionator. 
D)  numerator. 
A)  portion. 
B)  denominator. 
C)  fractionator. 
D)  numerator.

Exam 3: Basic Mathematics for Limited Operators

A satisfactory image is made using 200 mA and 0.05 sec. Which of the following exposures will produce a similar radiographic density?

A satisfactory lateral lumbar spine radiograph is taken using 200 mA,0.6 sec,94 kVp,and 40 inches SID. If an increase in SID to 60 inches is desired,which of the following technique changes will produce a radiographic density most similar to the original?

When the SID is doubled,the intensity of the radiation in the radiation field is:

A satisfactory AP lumbar spine radiograph is made using 200 mA,0.25 sec,78 kVp,and 40-inch SID. Which of the following technique changes will produce a radiograph of similar density while providing less contrast and less exposure to the patient?

If a satisfactory AP shoulder radiograph is made on a patient measuring 12 cm using 100 mA,0.15 sec,70 kVp,and 40 inches SID,which of the following techniques will provide the most similar radiograph of a patient whose shoulder measures 16 cm?

An x-ray exposure is made using the following factors: 300 mA,0.02 sec,60 kVp,60-inch SID,and the large focal spot. In this case,the value of the mAs is:

Which of the following is equivalent to 0.25 seconds?

What is a numerator?

Which of the following is an exponential expression of 100,000 as a power of 10?

In a continuing education course,you learn that approximately 85% of limited operators who have practiced for 5 or more years suffer from low-back pain. What does this number mean?

A fraction in which the top number is larger than the bottom number is called a(n)_____ fraction.

A satisfactory radiograph is made using 200 mA,0.3 sec,90 kVp,and 72-inch SID. Which of the following techniques will produce a similar result at 40 inches SID?

What is the mAs when 400 mA is used with a 50-millisecond exposure time?

Which of the following is equivalent to 30 milliseconds?

What is a denominator?

The lower or bottom number of a fraction is called a:

What is the decimal form oF 11000 \frac{1}{1000} 10001​ second?

A satisfactory radiograph is made using 100 mA,0.2 sec,80 kVp,and 40-inch SID. How much exposure time is required to produce a similar radiograph when using 400 mA?

What is required to add or subtract fractions?

The upper or top number of a fraction is called a:

Role of the Limited X-Ray Machine Operator

Introduction to Radiographic Equipment

Basic Physics of Radiography

X-Ray Production

X-Ray Circuit and Tube Heat Management

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

Filters

What is the decimal form oF $\frac{1}{1000}$ second?