Imaging System quiz

Where is the kV meter located in the x-ray tube circuit?

 

between the autotransformer and step-up transformer

 

in the secondary circuit

 

immediately before the step-down transformer

 

between rectifier and x-ray tube

between the autotransformer and step-up transformer

What is the purpose of the variable transformer?

 

increases amperage

 

increases voltage

 

selects voltage from incoming line

 

increases the number of electrons at the filament

selects voltage from incoming line

Question 3

What does mAs primarily control?

 

quality of electrons

 

quantity of electrons

 

penetrating power

 

quality of x-rays

quantity of electrons

What is the voltage ripple for a 3 phase, 12 pulse power generator?

 

100%

 

14%

 

4%

 

less than 1%

4%

Where is the mA meter located in the tube circuit?

 

primary side of the HVT

 

secondary side of autotransformer

 

between rectifier and x-ray tube

 

secondary side of HVT

secondary side of HVT

What material is used to make the semiconductor positive in solid state rectifiers?

 

gallium

 

arsenic

 

selenuim

 

silicon

gallium

What is the purpose of rectification

 

to increase power

 

change AC to DC

 

change DC to AC

 

to increase voltage

 

change AC to DC

How much current is needed to create thermionic emission at the filament?

 

3-6 Amps

 

1-3 Amps

 

3-6 mA

 

1-3 mA

3-6 Amps

What type of timer is used in most radiographic equipment today?

 

mechanical

 

synchronous

 

electronic

 

impulse

electronic

What does the AEC device control?

 

positioning cells

 

kV

 

mA!

 

exposure time

exposure time