Deck 22: Radiation Hazards

Question 1

Ionizing radiation exposure limits are the same for men and women (who are not pregnant).

Answer 1

True

Question 2

CNSC is not the only agency that regulates radiation exposure.

Answer 2

True

Question 3

A radioactive material is a material that emits corpuscular or electromagnetic emanations as the result of spontaneous nuclear disintegration.

Answer 3

True

Question 4

An over-exposure incident must be reported to the CNSC within 21 days after the event.

Question 5

What type of monitoring device is used to monitor surface contamination: radioactive particles on skin, hair, clothing, vehicles, or other objects that could be covered with radioactive dust?

A) Badge dosimeters
B) Hand-held contamination monitors
C) Pencil dosimeters
D) Electronic dosimeters
E) Portal monitors

Question 6

The most common source of ultraviolet radiation is the sun.

Question 7

For the exposure of non-nuclear workers to radiation during any calendar year, the exposure limit must not exceed 4mSv.

Question 8

High-level waste from nuclear power plants is usually stored on site in water-filled pools for years and then transferred to more permanent concrete bunkers or silos.

Question 9

The universal color scheme for causation signs and labels warning of radiation hazards is purple or magenta superimposed on a yellow background.

Question 10

Which of the following is a form or source of ionizing radiation?

A) Video display terminals
B) Visible radiation
C) Ultraviolet radiation
D) Electromagnetic radiation
E) X-rays

Question 11

Which of the following is a form or source of non-ionizing radiation?

A) Alpha rays
B) Beta rays
C) Gamma rays
D) Ultraviolet radiation
E) X-rays

Question 12

Which source of non-ionizing radiation has a frequency range of 300 MHz to 3 kHz?

A) Infrared radiation
B) Microwaves
C) Radio frequency (RF)
D) Extremely low frequency (ELF) radiation
E) Ultra-violet radiation

Question 13

The major concern about electromagnetic radiation (EMR) is its relationship to cancer.

Question 14

Radiation hazards in the workplace fall into three categories: alpha, beta, and gamma.

Question 15

A dose is the amount of ionizing radiation absorbed per unit of mass by part of the body or the whole body.

Question 16

Ionizing radiation is radiation with enough energy to remove electrons from the orbit of an atom, causing the atom to become charged or ionized.

Question 17

Ionizing radiation exposure limits are the same for nuclear and non-nuclear workers.

Question 18

Ionizing radiation exposure limits are the same for pregnant (after she knows) and other nuclear workers who are of childbearing age.

Question 19

What is the yearly ionizing radiation exposure limit for a non-nuclear worker?

A) 1 mSv
B) 4 mSv
C) 50 mSv
D) 100 mSv
E) 1000 mSv

Question 20

Sievert is a measure of the dose of ionizing radiation to body tissue stated in terms of its estimated biological effect relative to a dose of one roentgen of X-rays.

Question 21

What means of disposal is used for low-level nuclear waste?

A) It is sent to the Chalk River Laboratories.
B) It is stored in water-filled pools for years.
C) It is stored in concrete-filled bunkers for years.
D) It is buried deep underground in the Canadian shield.
E) It is rendered non-hazardous by ionization.

Question 22

A radiation area is best described as any accessible area in which radiation hazards exist that could deliver a dose of what intensity?

A) Within 1 hour, a major portion of the body could receive more than 1 millirem.
B) Within 1 hour, a major portion of the body could receive more than 2 millirem.
C) Within 1 hour, a major portion of the body could receive more than 5 millirem.
D) Within 5 consecutive days, a major portion of the body could receive more than 5 millirem.
E) Within 5 consecutive days, a major portion of the body could receive more than 10 millirem.

Question 23

What would the effect of a 100 sievert (100 Sv) exposure have on a worker?

A) No noticeable effect
B) Hair loss
C) Increase the risk of developing cancer later in life to 5 in 1,000
D) Increase the risk of developing cancer later in life to 5 in 100
E) Death within days or weeks

Question 24

What action is required in the case of radiation overexposure?

A) Immediately notify all staff members of the exposure.
B) The exposed worker is to remain at the worksite until an investigation is complete by CNSC.
C) The exposed worker is to remain at the worksite until decontaminated.
D) Conduct an investigation within 21 days.
E) Identify and take any action required to prevent the occurrence of a similar incident.

Question 25

Which of the following would increase exposure to electromagnetic radiation?

A) Replacing electric hand tools with pneumatic tools
B) Moving motors to the bottom or back of appliances
C) Using cancellation devices
D) Moving closer to transformers
E) Shielding transformer cables