Chapters 8 & 9

Question 1

What is needed to push electrons from the cathode to the anode?

Answer 1

High voltage

Question 2

The step up transformer is located in what part of the x-ray circuit?

Answer 2

Main x-ray circuit

Question 3

Which part of the circuit increases the voltage to a known quality?

Answer 3

Compensation circuit

Question 4

Which part of the circuit increases the voltage

Answer 4

Step-up transformer

Question 5

What is the purpose of the rectifier?

Answer 5

Changing AC to DC

Question 6

What device adjusts the number of electrons?

Answer 6

mA selector

Question 7

Thermionic Emissions requires?

Answer 7

High number of electrons, low voltage, high resistance

Question 8

Rotoring activates?

Answer 8

Filament circuit

Question 9

What is the most common interaction in the anode?

Answer 9

Heat

Question 10

What anode material is most commonly used in conventional radiography?

Answer 10

Tungsten

Question 11

The strength of bremsstrahlung-produced x-ray depends on?

Answer 11

How close the incident electron comes to the nucleus

Question 12

If an incident electron hits the nucleus, what type of interaction occurs?

Answer 12

Bremsstrahlung

Question 13

If the kVp is set to the 90 and the incident electron slams into the nucleus, what is the resulting power of the x-ray photon?

Answer 13

90 keV

Question 14

Characteristic x-ray production is the result of an interaction between an?

Answer 14

Incident electron and an orbiting electron

Question 15

During bremsstrahlung x-ray production, a greater number of strong x-rays are produced than weak ones?

Answer 15

False

Question 16

If a characteristic cascade occurs in an atom w/4 shells, how many x-rays could be created?

Answer 16

3

Question 17

In an electric current, how many pulses are generated in one direction if the electricity is @ 60 hertz?

Answer 17

60

Question 18

AC is needed to?

Answer 18

Adjust the kVp

Question 19

How many pulses are there in 60 Hz in a full wave rectified DC?

Answer 19

120

Question 20

When an electric current is rectified?

Answer 20

It is changed from AC to DC

Question 21

In which of these examples are there times at which there is no electron movement?

Answer 21

Single-phase, half-wave power

Question 22

Voltage ripple describes?

Answer 22

The fluctuating power of electron movement

Question 23

Single phase power requires an increase in technique compared w?High Frequency? (T or F)

Answer 23

True

Question 24

Most x-ray are produced through the ________ process?

Answer 24

Bremsstrahlung

Question 25

X-ray emission spectrum proves that more x-rays are produced through Bremsstrahlung process than any other interaction? (T or F)

Answer 25

True

Question 26

Common filter material used in conventional radiography?

Answer 26

Aluminum

Question 27

The heel effect?

Answer 27

Exists because some x-rays are absorbed by the surface of the anode?

Question 28

The principle means of heat transfer from the focal spot to the anode is?

Answer 28

Radiation

Question 29

The line focus principle?

Answer 29

Spreads the heat over a larger part of the anode

Question 30

The purpose of the cathode focusing cup is to?

Answer 30

Group electrons for their passage to the anode

Question 31

A molybdenum shaft is used to connect the anode to the rotor because?

Answer 31

It is a less dense metal with high melting point

Question 32

The principle means of heat transfer from the anode to the housing is?

Answer 32

Radiation

Question 33

The boost current in a filament?

Answer 33

Raises the filament to its operating temp.

Question 34

An increase in target angle will increase the heat capacity? (T or F)

Answer 34

T

Question 35

An increase in focal spot size will increase the heat capacity of the tube? (T or F)

Answer 35

T

Question 36

An increase in anode rotation speed will increase the heat capacity of the tube? (T or F)

Answer 36

T

Question 37

The transfer of heat by ________ is increase by mounting a fan on the tube housing?

Answer 37

Convention

Question 38

The principle means of heat transfer from the tube housing to the room is?

Answer 38

Convention

Question 39

The heel effect is more pronounced?

Answer 39

With a smaller SID

Question 40

The disadvantage of a small target angle is?

Answer 40

Greater anode heel effect

Question 41

Thermionic emission is the emission of?

Answer 41

Electrons from the heated cathode

Question 42

The tube current (mA) is changed by changing the?

Answer 42

Filament current