Algebra and Equations
Radiation Physics
Radiographic Procedures
Measurement Conversions
Radiation Dose Calculations
100

Solve for x in the equation 2x+5=15

x = 5

100

The intensity of an X-ray beam at 1 meter is 100 units. What is the intensity at 2 meters? 

  • A) 50 units
  • B) 25 units
  • C) 10 units
  • D) 75 units

B) 25 units

100

 If a procedure requires 120 mAs and the current is set to 300 mA, what is the exposure time in seconds?

  • A) 0.2
  • B) 0.4
  • C) 0.6
  • D) 1.0

A) 0.4

100

Convert 72 inches to centimeters. (1 inch = 2.54 cm)

  • A) 180 cm
  • B) 182.88 cm
  • C) 170 cm
  • D) 150 cm

B) 182.88 cm

100

Calculate the mAs for 200 mA and 0.5 seconds.

  • A) 100 mAs
  • B) 10 mAs
  • C) 50 mAs
  • D) 1 mAs

A) 100 mAs

200

Simplify 4(x−3)+2x.

6x−12

200

A radiograph requires an exposure of 10 mAs at 70 kVp. If the kVp increases to 80, what should the mAs be to maintain the same exposure? 

  • A) 15
  • B) 5
  • C) 20
  • D) 10

B) 5

200

 A radiographic image requires a magnification factor of 1.25. If the SID is 100 cm, what is the OID?

  • A) 25 cm
  • B) 20 cm
  • C) 30 cm
  • D) 15 cm

A) 25 cm

200

 Convert 500 mL to liters.

  • A) 5 L
  • B) 0.5 L
  • C) 0.05 L
  • D) 1 L

B) 0.5 L

200

 A solution contains 5% iodine. How many grams of iodine are in 200 mL?

  • A) 5 g
  • B) 10 g
  • C) 15 g
  • D) 20 g

B) 10 g

300

Solve the inequality 3x−7<11

x<6

300

Using the inverse square law, if the intensity is 100 mSv at 40 inches, what will it be at 80 inches? 

  • A) 50 mSv
  • B) 25 mSv
  • C) 12.5 mSv
  • D) 100 mSv

C) 25 mSv

300

With a SID of 180 cm, an object appears 1.5 times its actual size. What is the OID?

  • A) 30 cm
  • B) 60 cm
  • C) 45 cm
  • D) 50 cm

B) 60 cm

300

Convert 0.75 Gy to milligray.

  • A) 750 mGy
  • B) 75 mGy
  • C) 7.5 mGy
  • D) 70 mGy

A) 750 mGy

300

 Convert 5 rem to millisieverts. (1 rem = 10 mSv)

  • A) 50 mSv
  • B) 500 mSv
  • C) 5 mSv
  • D) 0.5 mSv

A) 50 mSv

400

Expand and simplify (x+2)(x−5).

  • A) x2+3x−10
  • B) x2−3x−10
  • C) x2−3x−5
  • D) x2+7x−10

B) x2−3x−10

400

 A radioactive substance has a half-life of 6 hours. What fraction remains after 18 hours?

  • A) 1/4
  • B) 1/6
  • C) 1/8
  • D) 1/3

C) 1/8

400

A patient’s medication is reduced from 150 mg to 120 mg. What is the percentage decrease?

  • A) 15%
  • B) 20%
  • C) 25%
  • D) 10%

B) 20%

400

A patient weighs 154 lbs. Convert this to kilograms (1 kg ≈ 2.2 lbs).

  • A) 70 kg
  • B) 75 kg
  • C) 80 kg
  • D) 85 kg

A) 70 kg

400

 If the magnification factor is 1.25, and the actual object size is 5 cm, what is the image size?

  • A) 6.25 cm
  • B) 7 cm
  • C) 4 cm
  • D) 6 cm

A) 6.25 cm

500

Solve for x in the equation 2x+2x=16.

x = 4

500

If the exposure to radiation decreases by half every 5 cm of tissue, what is the exposure after 15 cm, starting from 80 mGy?

  • A) 20 mGy
  • B) 40 mGy
  • C) 10 mGy
  • D) 5 mGy

C) 10 mGy

500

 A radiographic table supports up to 200 kg. What is this weight in pounds? (1 kg ≈ 2.2 lbs)

  • A) 220 lbs
  • B) 440 lbs
  • C) 500 lbs
  • D) 400 lbs

B) 440 lbs

500

A radiograph measures 35 cm by 43 cm. What are the dimensions in inches?

  • A) 13.78 in by 16.93 in
  • B) 12 in by 15 in
  • C) 14 in by 17 in
  • D) 14.5 in by 18 in

A) 13.78 in by 16.93 in

500

 Convert 0.045 to a fraction in simplest form.

  • A) 45/100
  • B) 9/200
  • C) 9/100
  • D) 45/200

C) 9/200

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