5 Written Questions

1. with three phase rectified power, we have to use____mAs, and ____ time.
2. 3 phase full wave 6 pulse has this amount of ripple
3. P type of the crystal lattice of silicon has a whole in it give it a ____ charge.
4. three phase and high frequency generators results in a ____ to ___ increase in x rays produced than single phase.
5. what is the most common material for a semiconductor?

5 Matching Questions

1. Expensive
2. 12-16%
3. capacitors
4. High Frequency
5. Capacitors

1. a these store power
2. b the size of plates, space between plates and ability of dielectric to support electrostatic forces all are factors affecting what?
3. c what are disadvantages of solid state diodes?
4. d What type of generator is generally used in x-rays this day in age.
5. e when going from single phase to three phase we must decrease KV how much?

5 Multiple Choice Questions

1. This junction allows electron flow in only one direction
   1. P and N
   2. Power
   3. C-arm
   4. N and P
2. high-frequency has this amount of ripple
   1. 1%
   2. 4%
   3. 10-12
   4. 14%
3. where is the mA meter?
   1. Secondary side of High Voltage Transformer/rectification
   2. Space Charge Compensator
   3. Because it has to read the actual tube current
   4. compact size, more efficient, longer life
4. As electrons released from cathode small variations in kVp cause large changes in tube current. what device regulates this?
   1. Variable resistor
   2. Tube Current
   3. direct current
   4. Space Charge Compensator
5. High frequency generators generally look close to what?
   1. timing circuit
   2. electrons
   3. Tube Current
   4. direct current

5 True/False Questions

1. semiconductor diodes → solid state rectifiers can also be called :

   True        False

2. Power → Current x Potential

   True        False

3. Capacitor Discharge unit → Inadequate x-rays, use of wall outlet is necessary, requires charging time between each exposure, older units may be hazardous are characteristics of what unit (mobile)

   True        False

4. electrons → what is the most common material for a semiconductor?

   True        False

5. tube failure → single exessive exposure which pits or cracks anode can cause?

   True        False