Deck 8: Film Processing: the Darkroom

Question 1

Identify the best way to check for light leaks in the darkroom:

A)stand inside the darkroom in complete darkness
B)paint the walls black
C)check the tightness of the lids for the processing tanks
D)process several films and check for film fog

Answer 1

stand inside the darkroom in complete darkness

Question 2

The concentrated solution that is added to the processing solutions to compensate for oxidation and loss of solution volume is called:

A)acidifier
B)replenisher
C)hardener
D)oxidizer

Answer 2

replenisher

Question 3

Under typical working conditions, the developer and fixer solutions should be changed:

A)at least every other day
B)once each week
C)every 2 to 3 weeks
D)every 2 to 3 months

Answer 3

every 2 to 3 weeks

Question 4

Cell phones should not be used in the darkroom because:

A)the illumination from the phone could cause film fog or expose the film
B)talking on the phone while processing radiographs is confusing
C)the phone could be dropped into the processing solutions
D)the operator may inadvertently open the darkroom door while processing

Question 5

All of the following affect the life of processing solutions EXCEPT:

A)the number of films processed
B)the size of the films processed
C)the age of the solutions
D)the type of safelight

Question 6

The protective coating on the emulsion is softened by the _______ and hardened by the _________.

Question 7

A well-designed darkroom has ____ different light sources.

A)3
B)4
C)5
D)10

Question 8

Light leaks in the darkroom will cause:

A)overdevelopment of film
B)underexposure of film
C)fogging of film
D)all of the above

Question 9

Defective film hangers should be disposed of because they can cause ___________.

Question 10

Panoramic films are __________ sensitive to darkroom light than intraoral film.

Question 11

The minimum size for a darkroom should be:

A)2 × 2 feet
B)4 × 4 feet
C)6 × 6 feet
D)none of the above

Question 12

All of the following components are important for a darkroom EXCEPT:

A)it should be light-tight
B)it should have safe-light and overhead white light sources
C)it should be connected to a dental laboratory space
D)it should have room for processing tanks

Question 13

Identify the optimum time and temperature for films to remain in the developer solution:

A)80° F for 2 minutes
B)75° F for 3 minutes
C)70° F for 4 minutes
D)68° F for 4 minutes

Question 14

Torn emulsion is usually the result of:

A)excessive drying
B)improper fixing
C)drying films in contact
D)inadequate rinsing

Question 15

In manual processing, the thermometer should be kept in which solution?

A)developer
B)fixer
C)water bath
D)any of the above

Question 16

The coin test is an easy and reliable way to check the:

A)strength of the developer solution
B)safelight
C)density of the radiographic image
D)film speed

Question 17

A clear film can be caused by ______ or _______.

Question 18

If the developing time is 5 minutes, then the fixing time should be approximately ______________.

Question 19

The typical wattage of a bulb used in safelighting is 60 to 75 watts. The safelight should be placed 3 to 4 feet from the working area.

A)both statements are true
B)both statements are false
C)the first statement is true;the second statement is false
D)the first statement is false;the second statement is true

Question 20

If the silver halide crystals in the film emulsion are energized, more silver precipitates to give a _______ appearance on an image.

A)radiolucent
B)radiopaque
C)clear
D)light

Question 21

The final washing step in manual processing typically lasts:

A)about 1 minute
B)about 5 minutes
C)8 to 10 minutes
D)about 20 minutes

Question 22

The check for adequate safelighting is accomplished with:

A)the reference film
B)the pocket dosimeter
C)the step wedge
D)the coin test

Question 23

The washing step between the developer and fixer solution usually lasts approximately 20 seconds. It is safe to open the darkroom door during this time period.

A)both statements are true
B)both statements are false
C)the first statement is true;the second statement is false
D)the first statement is false;the second statement is true

Question 24

Reticulation causes the processed film to have a wrinkled appearance. Identify the cause for reticulation:

A)sudden temperature change between processing solutions and water bath
B)fluoride contacted the film before processing
C)air was trapped on the emulsion during processing
D)films were dried to each other

Question 25

Identify the amount of time to wait between loading individual films into the automatic processor to avoid film overlap:

A)5 seconds
B)10 seconds
C)15 seconds
D)30 seconds

Question 26

All of the following are advantages of automatic processing EXCEPT:

A)automated time-temperature processing
B)cost
C)time saved during processing procedures
D)increased volume of films that are processed