Practice #5 12-21

Question 1

What would be the total dose to a worker if he was working in an area where the gamma dose rate was 200 mrem/hr and the airborne concentration from iodine-131 was 2 DAC. Assume the worker stayed in the area for 30 minutes.

Answer 1

102.5 mrem

Question 2

The nucleus of an atom carries a positive electrical charge that is balanced by the negative electrical charge of?

Answer 2

Orbital electrons

Question 3

Which of the following statements best describes mass defect?

Answer 3

The total mass of nuclide is less than the total mass of the individual particles.

Question 4

Which of the following statements are correct concerning alpha decay?

Answer 4

A. Only relatively heavy nuclides decay by alpha
B. An alpha particle is essentially a helium nucleus consisting of two protons and two neutrons.
C. The charge of an alpha particle is +2 due to the electrical charge of protons

Question 5

Which of the following particles meet this description. A ___________ particle can travel several hundred time the distance of an alpha particle and can be stopped by a few millimeters of aluminum?

Answer 5

Neutrino

Question 6

Which of the following best describes Bremsstrahlung radiation?

Answer 6

High speed particles traveling near an atom with a high Z number being deflected from it course by the electrostatic force of the positively charged nucleus resulting in the emission of x-rays.

Question 7

Which of the following is a method that gamma rays interact with matter?

Answer 7

Bremsstrahlung

Question 8

When a gamma photon transfers part of its energy to an electron, resulting in the less energetic photon changing direction, is a description of which gamma interaction below?

Answer 8

Compton scatter

Question 9

Which of the following statements best describes the term Total Effective Dose Equivalent, TEDE?

Answer 9

Is the sum of skin of the whole body and the internal organ.