Q: A nuclear technician is exposed to $$5\ \text{mGy} of $$radiation, while another is exposed to $$9\ \text{rad}. $$Which technician received more radiation? (1 Gy = 100 rad)

The technician exposed to $$9\ \text{rad}$$

Q: Which of the following best describes the relationship between rad and gray (Gy)?

$$1\ \text{Gy} = 100\ \text{rad}$$

Q: A solution of iodine-131 has an activity of $$1.08 \times 10^7$\ \text{Bq/mL}. If$$ $$2.57\ \text{mL} is $$administered, what is the total activity delivered (in Bq)?

$$2.77 \times 10^7$\ \text{Bq}$$

Q: Which of the following is the correct conversion factor between rem and sievert (Sv)?

$$1\ \text{rem} = 0.01\ \text{Sv}$$

Question 1

Which property is being measured when using the unit 'Becquerel (Bq)' in radiation science?

Accepted Answer

Activity (decay events per second)

Question 2

A patient receives a chest X-ray with an effective dose of $$0.09\ 	ext{mSv}. $$How many rem is this dose? (1 rem = 0.01 Sv)

Accepted Answer

$$0.009\ 	ext{rem}$$

Question 3

Which of the following correctly matches the SI unit with the property it measures?

Accepted Answer

Sievert (Sv) — Biological damage

Question 4

A nuclear technician is exposed to $$5\ 	ext{mGy} of $$radiation, while another is exposed to $$9\ 	ext{rad}. $$Which technician received more radiation? (1 Gy = 100 rad)

Accepted Answer

The technician exposed to $$9\ 	ext{rad}$$

Question 5

Convert $$23\ 	ext{Sv} to $$rem.

Accepted Answer

$$2,300\ 	ext{rem}$$

Question 6

Which of the following best describes the relationship between rad and gray (Gy)?

Accepted Answer

$$1\ 	ext{Gy} = 100\ 	ext{rad}$$

Question 7

A solution of iodine-131 has an activity of $$1.08 	imes 10^7$\ 	ext{Bq/mL}. If$$ $$2.57\ 	ext{mL} is $$administered, what is the total activity delivered (in Bq)?

Accepted Answer

$$2.77 	imes 10^7$\ 	ext{Bq}$$

Question 8

Which unit is used to measure the biological effect of radiation on tissue?

Accepted Answer

Sievert (Sv)

Question 9

If a sample has an activity of $$3.7 	imes 10$$^{10}$$\ 	ext{disintegrations/sec}$$, how many curies (Ci) does it have?

Accepted Answer

$$1\ 	ext{Ci}$$

Question 10

Which of the following statements about the rem is correct?

Accepted Answer

It accounts for both ionizing intensity and biological effect

Question 11

A patient receives a dose of $$0.5\ 	ext{Gy}$$ from a medical procedure. What is this dose in rad?

Accepted Answer

$$50\ 	ext{rad}$$

Question 12

Which of the following is the correct conversion factor between rem and sievert (Sv)?

Accepted Answer

$$1\ 	ext{rem} = 0.01\ 	ext{Sv}$$

Question 13

A radioactive sample has an activity of $$2.0\ 	ext{Ci}. $$How many disintegrations per second does this represent?

Accepted Answer

$$7.4 	imes 10$$^{10}$$

Question 14

Which of the following best describes the difference between rad and rem?

Accepted Answer

Rad measures energy absorbed, rem measures biological effect

Question 15

A patient receives $$0.25\ 	ext{Gy} of $$radiation. What is the equivalent dose in mGy?

Accepted Answer

$$250\ 	ext{mGy}$$

Question 16

Which of the following is NOT a correct unit-property pair?

Accepted Answer

Sievert (Sv) — Ionizing intensity

Question 17

If a tissue absorbs $$1\ 	ext{Gy} of $$radiation, what is the equivalent dose in rad?

Accepted Answer

$$100\ 	ext{rad}$$

Question 18

A radioactive solution has an activity of $$5.0 	imes 10^6$\ 	ext{Bq}. $$How many microcuries ($$\muCi) is $$this? ($$1\ 	ext{Ci} = 3.7 	imes 10$$^{10}$$\ 	ext{Bq})$$

Accepted Answer

$$135\ \mu	ext{Ci}$$

Units of Radiation Measurement and Dose Calculations

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