Practice #2 28-40

Question 1

LD 50/30 means that 50% of the general population is expected to die within a 30 day period after receiving a dose of _____________without medical care?

Answer 1

400-500 rad

Question 2

The linear, no-threshold model for radiation exposure, assumes there is some effects for radiation exposure at low doses. True or False?

Answer 2

True

Question 3

The half-life of a radionuclide is best defined as:

Answer 3

The amount of time it takes for the activity present to be reduced to one-half.

Question 4

The term ALARA, A Low As Reasonably Achievable, means we have to lower the exposure to individuals and groups no matter the cost. True or False?

Answer 4

False

Question 5

The embryo/fetus is most susceptible to health effects from ionizing radiation if exposed during 8-15 weeks after conception. True or False?

Answer 5

True

Question 6

Maintaining dose to individuals working at a nuclear power stations, as well as the public, should be maintained ALARA. The ALARA concept is required by Federal Law. True or False?

Answer 6

True

Question 7

A curie is a measure of radioactivity and is defined as ____________ disintegrations per second.

Answer 7

3.7 X 10¹º

Question 8

An acute radiation exposure where symptoms include convulsions and tremors could be which of the following?

Answer 8

Central Nervous System Syndrome (CNS)

Question 9

Because an alpha particle consists of two protons and two neutrons, it would have a mass of 4 amu and an electric charge of ___________.

Answer 9

+2

Question 10

What is a true statement that best describes Photoelectric Effect?

Answer 10

The photon transfers all of its energy to an electron, ejecting the electron from the atom