True or False: The amount of silver recovered from the fixer is based on the volume of films that are processed.

• True

• False

Which dark room entrance was not time efficient and could be a safety hazard?

• Single door

• Double door

• Labyrinth

• Rotating door

True or False: The safelight should be placed 3 feet from where the technologist is working with x-ray film.

• True

• False

True or False: The darkroom should have floors that are dark in color.

• True

• False

How many air exchanges per hour must a darkroom have for adequate ventilation?

• 5

• 10

• 15

• 20

True or False: Another name for a viewbox is illuminator.

• True

• False

How long should you be able to work with your film under a safelight?

• 20-30 seconds

• 30-60 seconds

• 60-90 seconds

• 90- 120 seconds

True or False: Viewboxes must give off yellow light to view x-ray films properly.

• True

• False

Which method of silver recovery produces hazardous gas?

• metal replacement

• electrolytic

• chemical precipitation

• resin

What factors determine the efficiency of silver recovery?

• surface area, agitation and dwell time

• surface area, temperature and agitation

• surface area, temperature and dwell time

• surface area and dwell time only