LATG CHapter 7Occupational health and safety

Question 1

Risk assessment

Answer 1

includes knowing what types of hazards are present and then determining the level of protection necessary to minimize the danger they pose

Question 2

threshold limit value (TLV )

Answer 2

• chemical substance is an estimate of the reasonable level to which a worker can be exposed without adverse effects.
• issued by the American Conference of Governmental Industrial Hygienists

Question 3

Safety data sheets provide

Answer 3

Physical property and toxicology information

Question 4

Alpha particles

Answer 4

particles are emitted from radioisotopes such as americium-241 (commonly used in smoke detectors
-heavy; they travel just a few centimeters in the air and are easily absorbed by thin layers of light materials, such as a sheet of paper. They cannot penetrate the skin, so they generally pose the least threat to safety when external. 2 protons

Question 5

Beta (β) particles

Answer 5

are subatomic particles that are either an electron, which is negatively charged, or a positron, which is positively charged
- thousands of times smaller than alpha particles. They move at high speed and have a higher energy than alpha particles. Tritium (3H), carbon-14 (14C)

Question 6

Ionizing radiation

Answer 6

causes breaks in DNA molecules and generates destructive free radicals (cancer, mutations)

Question 7

Gamma (γ) radiation and x-rays

Answer 7

electromagnetic radiation similar to visible light, radio waves, and ultraviolet light, but with higher energy. Gamma radiation is generated from radioactive decay. Gamma radiation and x-rays can penetrate through the body,

Question 8

Bremsstrahlung

Answer 8

An X-ray produced by beta particles when they decelerate

Question 9

Which type of radiation is electromagnetic radiation generated non-radioactively

Answer 9

Xrays

Question 10

Exposure to which of the following is a potential hazard related to the use of lasers during surgery

Answer 10

Aerosols and gases