Radiation Health and Safety Test Radiation Health and Safety Test Radiation Physics & Principles 1

Question 1

Which type of ionizing radiation has the greatest penetrating power?

Accepted Answer

Gamma rays

Answer

Alpha particles

Answer

Beta particles

Answer

Neutrons

Question 2

What is the SI unit of absorbed radiation dose?

Accepted Answer

Gray

Answer

Roentgen

Answer

Rem

Answer

Curie

Question 3

What term describes the time required for a radioactive substance to lose half of its radioactivity?

Accepted Answer

Half-life

Answer

Decay constant

Answer

Mean life

Answer

Biological half-life

Question 4

Which atomic process is responsible for the emission of characteristic X-rays?

Accepted Answer

Electron shell transition

Answer

Nuclear fission

Answer

Neutron capture

Answer

Beta decay

Question 5

What is Bremsstrahlung radiation?

Accepted Answer

X-rays produced when fast electrons decelerate near a nucleus

Answer

Radiation emitted during nuclear fission

Answer

Gamma rays emitted after beta decay

Answer

Radiation from radioactive decay of heavy elements

Question 6

Which interaction is the predominant photon interaction at diagnostic X-ray energies (20–100 keV)?

Accepted Answer

Compton scattering

Answer

Pair production

Answer

Photoelectric effect

Answer

Coherent scattering