Ch4 Pratice Questions

Question 1

1 gray equals:

Answer 1

100 cGy.

Question 2

Which of the following units are not SI units?

1. Roentgens
2. Coulombs per kilogram, grays, Sieverts
3. Rads and rems

Answer 2

1 and 3

Question 3

Of the following hereditary effects, which are considered to be late stochastic effects from exposure to ionizing radiation?

1. Decreased birth weight
2. Increased stillbirths
3. Infant and childhood mortality

Answer 3

12 and 3

Question 4

Which of the following rem values equals 35 mSv?

Answer 4

3.5 rem ( rem-> msv)

Question 5

Beta particles are actually:

Answer 5

. high-speed electrons.

Question 6

One thousand five hundred rem equals _________ Sieverts.

Answer 6

15

Question 7

Among physicians, cancer deaths attributed to x-ray exposure were reported as early as:

Answer 7

1910

Question 8

Which of the following is the SI unit of electrical current?

Answer 8

Ampere

Question 9

If 400 people receive an average effective dose of 0.25 Sv, what is the collective effective dose?

Answer 9

100 person-Sieverts. ( 400x0.25)

Question 10

Who was the first American radiation worker to die from radiation-induced cancer in October of 1904?

Answer 10

Clarence Madison Dally

Question 11

Which of the following are types of ionizing radiation that produce virtually the same biologic effect for equal absorbed doses in body tissue?

Answer 11

Correctc. X-rays, beta particles, and gamma rays

Question 12

In the diagnostic radiology energy range from 23 to 150 kVp (which includes mammography), which of the following tissues possesses the greatest ability to absorb radiant energy through the process of photoelectric absorption?

Answer 12

Bone

Question 13

Alpha particles have a radiation weighting factor (WR) that is numerically equal to:

Answer 13

20

Question 14

In the SI system, an energy absorption of 1 joule (J) per kilogram of matter in the irradiated object equals which of the following?

Answer 14

. 1 Gy