TCDHA UPDATED 2026 LATEST QUESTIONS AND
ANSWERS SURE A+
✔✔light leaks in a dark room will cause - ✔✔fogged films
✔✔safelight - ✔✔red, placed 4 feet away from working area
✔✔automatic processor developer temperature - ✔✔80-95 degrees
✔✔time it takes for automatic processing - ✔✔4-6 minutes
✔✔underdeveloped film - ✔✔light, cold or weak developer was used
✔✔overdeveloped film - ✔✔dark, high developer temperatures or too much developing
time
✔✔reticulation - ✔✔film appears cracked, sudden change in temperature
✔✔developer spots - ✔✔Dark spots. Developer contacts film before processing.
✔✔fixer spots - ✔✔White spots. fixer solution contacts film before processing
✔✔yellow-brown stain - ✔✔exhausted processing solutions, insufficient fixing or rinsing
✔✔fixer cut off - ✔✔low level of fixer solution or improper placement on film racks
✔✔developer cut off - ✔✔low level of developer solution or improper placement on film
racks
✔✔air bubbles - ✔✔white spots. air is trapped on a film surface after being placed in the
processing solution
✔✔fingerprint artifact - ✔✔black fingerprint
✔✔static electricity - ✔✔thin black lines
✔✔scratched film - ✔✔white lines
✔✔light leaks - ✔✔black
✔✔expired film appears - ✔✔fogged
, ✔✔proper screen film contact - ✔✔wire mesh image on the film exhibits a uniform
density
✔✔check the darkroom for light-tightness and safe lighting - ✔✔every 6 months
✔✔Replenish processing solutions - ✔✔daily
✔✔chnage processing solutions - ✔✔weekly
✔✔fixer solution should be changed - ✔✔if it does not clear in 3 to 4 minutes
✔✔full strength fixer clears - ✔✔in two minutes
✔✔normalizing device - ✔✔Monitors the strength of the developer and film density
✔✔safety code 30 - ✔✔Recommended Safety Procedures for the Use of Dental X-Ray
Equipment
✔✔at 68 F the optimal time for manual processing - ✔✔5 minutes
✔✔Annual xray machines tests can be performed by - ✔✔dentist, hygienist or assistant
✔✔coin test - ✔✔safelighting
✔✔clearing test monitors - ✔✔fixer strenght
✔✔malpractice - ✔✔negligent in the delivery of care
✔✔disinfection - ✔✔destroys all pathogens except spores
✔✔SLOB - ✔✔same lingual, opposite buccal
✔✔rotation centers used in panoramic radiography - ✔✔Double-center
Triple-center
Moving-center
✔✔the focal trough is - ✔✔narrow in anterior region and wide in posterior
✔✔clients head tilts upwards - ✔✔spine is super imposed
✔✔horizontal plane - ✔✔frankfort
✔✔vertical plane - ✔✔mid sagittal
ANSWERS SURE A+
✔✔light leaks in a dark room will cause - ✔✔fogged films
✔✔safelight - ✔✔red, placed 4 feet away from working area
✔✔automatic processor developer temperature - ✔✔80-95 degrees
✔✔time it takes for automatic processing - ✔✔4-6 minutes
✔✔underdeveloped film - ✔✔light, cold or weak developer was used
✔✔overdeveloped film - ✔✔dark, high developer temperatures or too much developing
time
✔✔reticulation - ✔✔film appears cracked, sudden change in temperature
✔✔developer spots - ✔✔Dark spots. Developer contacts film before processing.
✔✔fixer spots - ✔✔White spots. fixer solution contacts film before processing
✔✔yellow-brown stain - ✔✔exhausted processing solutions, insufficient fixing or rinsing
✔✔fixer cut off - ✔✔low level of fixer solution or improper placement on film racks
✔✔developer cut off - ✔✔low level of developer solution or improper placement on film
racks
✔✔air bubbles - ✔✔white spots. air is trapped on a film surface after being placed in the
processing solution
✔✔fingerprint artifact - ✔✔black fingerprint
✔✔static electricity - ✔✔thin black lines
✔✔scratched film - ✔✔white lines
✔✔light leaks - ✔✔black
✔✔expired film appears - ✔✔fogged
, ✔✔proper screen film contact - ✔✔wire mesh image on the film exhibits a uniform
density
✔✔check the darkroom for light-tightness and safe lighting - ✔✔every 6 months
✔✔Replenish processing solutions - ✔✔daily
✔✔chnage processing solutions - ✔✔weekly
✔✔fixer solution should be changed - ✔✔if it does not clear in 3 to 4 minutes
✔✔full strength fixer clears - ✔✔in two minutes
✔✔normalizing device - ✔✔Monitors the strength of the developer and film density
✔✔safety code 30 - ✔✔Recommended Safety Procedures for the Use of Dental X-Ray
Equipment
✔✔at 68 F the optimal time for manual processing - ✔✔5 minutes
✔✔Annual xray machines tests can be performed by - ✔✔dentist, hygienist or assistant
✔✔coin test - ✔✔safelighting
✔✔clearing test monitors - ✔✔fixer strenght
✔✔malpractice - ✔✔negligent in the delivery of care
✔✔disinfection - ✔✔destroys all pathogens except spores
✔✔SLOB - ✔✔same lingual, opposite buccal
✔✔rotation centers used in panoramic radiography - ✔✔Double-center
Triple-center
Moving-center
✔✔the focal trough is - ✔✔narrow in anterior region and wide in posterior
✔✔clients head tilts upwards - ✔✔spine is super imposed
✔✔horizontal plane - ✔✔frankfort
✔✔vertical plane - ✔✔mid sagittal
