RADT 156- EXAM 1 review Questions with Correct Answers

RADT 156- EXAM 1 review Questions
with Correct Answers
6 common malfunctions of x-ray tube - Answer-1. Filament burnout
2. Cracked anode
3. Pitting of anode "bullet like melts"
4. Surface melting "grazing"
5. Imbalance anode
6. Gassy tube "Sunburn effect" or "Tanning"

Causes of filament burnout - Answer-1. excessive prep time
2. high mA exposures in cold filament
3. frequent overheating

What is considered excessive prep time? - Answer-Over 1-4 seconds

Clues of filament burnout - Answer-1. No exposure (ready/green light is not on)
2. Exposure made on different filament

Prevention of filament burnout - Answer-1. Avoid excessive prep
2. Allow filament cool
3. Use lower mA station when possible

Causes of cracked anode - Answer-1. High kV exposures on cold anode
2. No equipment warm up procedure

Clues of cracked anode - Answer-1. thumping noise
2. vibration/tube movement
3. sudden reduced radiation output

Prevention of cracked anode - Answer-1. Warm up procedure

Cracked anode could cause DANGER and cause what.. - Answer-Arcing

Define arcing - Answer-The formation of an electric arc, producing a prolonged electrical
discharge.

Causes of pitting of anode - Answer-1. Excessive over heating
2. High mA exposures on warm anode
3. Failed rotating anode

Clues of pitting of anode - Answer-1. dramatic decrease in radiation output
2. uneven densities