Dental film has a polyester base for the purpose of:
a. increasing the contrast and image quality.
b. providing support for the emulsion.
c. producing the latent (invisible) image.
d. preventing scatter radiation from exposing the film.
b. The purpose of the film base is to provide support for the fragile emulsion and to provide strength for handling.
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Your brother-in-law tells you that he and a group of friends are going to be doing some backcountry skiing. You ask him if they know what to do in case of an avalanche. Which of the following responses would indicate to you that your brother-in-law has thought about this possibility?
a. "Everyone in the group has a cell phone and an avalanche transceiver." b. "There are a lot of us in the group, so we should be able to rescue someone ourselves." c. "Because it is late spring, I don't think we would have much to worry about." d. "We are not going to a very remote area, so we should be able to have searchers there in a couple of hours."
A patient has had a ventilation-perfusion scan. What would be identified from the ventilation scan?
a. Location of a lung abscess b. Alveolar consolidation c. Location of a pulmonary embolism d. Location of an airway obstruction
All of the following agents may interact with growth hormones, except:
A) estrogens B) anabolic steroids C) thyroxine D) insulin
Where is the power supply control for an escalator usually located?
a. under an sidewall access plate b. under the top landing plate c. in the escalator mechanical room d. at the top & bottom of the handrail