Q5

Question 0

Angle of anode

Answer 0

•7-18* degrees

Question 1

Effective/Apparent focal spot

Answer 1

• perpendicular to long axis of tube •smaller then the actual focal spot
• the beam projected onto the patient

Question 2

|< (diode)

Answer 2

• | cathode negative side

* < anode positive side

Question 3

Bias Forward flow

Answer 3

•Cathode(negative)-Anode(positive)

Question 4

Valve tubes/Diodes

Answer 4

• allow flow in one direction negative-positive
• lessons load on tube
• prolongs life

Question 5

Focusing cup

Answer 5

• negatively charged

* keeps the electrons in a cloud

Question 6

Cathode(filament)

Answer 6

•produces electrons through thermionic emissions

Question 7

Anode

Answer 7

•receives/attracts electrons

Question 8

Valve tube rules for conduction

Answer 8

• cathode-anode

* negative-positive

Question 9

Why rectify X-ray tubes

Answer 9

•to be closer to DC •works more efficient on direct current

Question 10

True/False X-ray tubes self rectify

Answer 10

•True

Question 11

Actual focal spot

Answer 11

•perpendicular to target/anode face

Question 12

How many pulses per sec. Does a full wave rectification have

Answer 12

•120 pulses per sec.

Question 13

How many pulses per sec. Does a half wave rectification have

Answer 13

•60 pulses per sec.

Question 14

Full wave rectification principle

Answer 14

•creates full wave rectified pulsed DC flow to tube

Question 15

On an autotransformer what side is the line compensator on?

Answer 15

•input

Question 16

Kv taps location

Answer 16

• major/minor kVp

* output taps

Question 17

Autotransformer

Answer 17

•operates as primary/secondary coil by adjusting # of coils on either side

Question 18

Equation for calculating heat units

Answer 18

• Kv x mA x time x constant

* constant is 1 for single phase

Question 19

The smaller the anode angle..

Answer 19

•the larger the heel effect

Question 20

Difenition of roentgen

Answer 20

•ionization of air