Physics Chapter 1 Test

Question 0

What are the two systems of measure commonly used in radiologic sciences?

Answer 0

◾️British System

◾️the System international (SI) metric system

Question 1

What are the radiologic quantities derived from the fundamental quantities of mass, length, and time?

Answer 1

◾️dose
◾️dose equivalent
◾️exposure
◾️radioactivity

Question 2

What is the quantity of matter contained in an object, that does not change with gravitational force, and does not change if the substance changes forms?

Answer 2

Mass

Question 3

What is anything that occupies space, has shape or form, and mass?

Answer 3

Matter

Question 4

What is a gravitational force exerted on a body? Aka as weight

Answer 4

Pound

Question 5

What is the SI unit for length?

Answer 5

Meter

Question 6

What is the property of an object with mass that resists a change in its state of motion?

Answer 6

Inertia

Question 7

State Newtons Law of motion.

Answer 7

An object at rest will stay at rest, unless acted on by an external force. An object object in motion will remain in motion at the same velocity and in the same direction unless acted on by an external force.

Question 8

What is the ability to do work?

Answer 8

Energy

Question 9

Define potential energy.

Answer 9

Energy in a stored state.

Question 10

Define kinetic energy.

Answer 10

Energy being expended.

Question 11

What are the standard units that quantify radiation doses?

Answer 11

◾️Roentgen(R)
◾️rad
◾️rem
◾️Curie (Ci)

Question 12

What unit is the SI equivalent to Coulomb? It is used to quantify radiation intensity.

Answer 12

Roentgen

Question 13

What quantifies the biological effects of radiation on humans and animals? Unit of absorbed dose.

Answer 13

Rad

Question 14

What quantifies the occupational exposure or dose equivalent? Specifically addresses the different biological effects of different types of ionizing radiation to which a radiation may be exposed.

Answer 14

Rem

Question 15

What quantifies radioactivity? An expression of a quantity of radioactive material not the effect of the radiation emitted from it.

Answer 15

Curie

Question 16

Aka as disintegration. The process where a radioactive atom gives off particles and energy in an effort to regain a stable state.

Answer 16

Disintegration

Question 17

What does permanently installed equipment consist of?

Answer 17

Units that are fixed in place in a particular room specifically designed for the purpose and not intended to be mobile.

Question 18

What is an X-ray tube? What does it do?

Answer 18

Special diode tube that converts electrical energy into X-rays and produces heat as a by product

Question 19

What are positive and negative electrodes are?

Answer 19

◾️positive electrode-anode

◾️negative electrode-cathode

Question 20

Which part of the tube is commonly situated over the head?

Answer 20

Anode

Question 21

Which part of the tube is over the feet?

Answer 21

Cathode is over the foot of the table

Question 22

What is the tube housing?

Answer 22

It is made of metal and has a special mounting bracket for the tube and high voltage receptacles to deliver electricity to the X-ray tube.

Question 23

What’s the purpose of the oil surrounding the tube housing?

Answer 23

The oil helps dissipate the heat produced. There are also cooling fans installed to help as well?

Question 24

What is a collimator? What does it do?

Answer 24

A box shaped device attached to the bottom of the housing, serves to restrict the X-ray beam to the area of the body of interest and to help localize the beam to that area.

Question 25

What’s the function of the mirror in the collimator?

Answer 25

It reflects the light source through the plastic and casts a shadow of the crosshairs into the patient.

Question 26

What’s the function of the shutters within the collimator?

Answer 26

It adjusts the size of the light field which represents the radiation field that will be produced.

Question 27

What’s the function of the tube stand?

Answer 27

The portion of the tube head assembly that gives mobility to the cray tube. Aka as the tube mount