Which North American railroad tank car markings indicate the standards to which a tank car was built?

Which of these statements regarding classification of objects used in radiographic procedures is FALSE?

a. Critical objects must be sterilized after each use. b. Most quality-made image receptor holders are sterilizable or disposable. c. Semicritical objects are those used to penetrate soft tissue or bone. d. No critical instruments are used in dental radiography.

After aseptically removing the barriers, film packets that were packaged inside barrier envelopes may be processed with clean, dry hands because the film packets are not contaminated

a. The first part of the statement is true. The second part of the statement is false. b. The first part of the statement is false. The second part of the statement is true. c. Both parts of the statement are true. d. Both parts of the statement are false.