Which of the following is required to produce an x-ray?
A source of electrons
B. A large potential difference
C. A vacuum
D. All the above
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Most of the energy of the electrons from the cathode is converted to _____.
A. X-rays
B. Scatter
C. Heat
D. primary beam
Upon completing an X-ray exposure and turning the equipment off, _____.
A. personnel should wait for a few minutes before entering the exposure area.
B. personnel should wear a lead-lined apron before entering-the exposure area.
C. personnel should enter the exposure area without fear of radiation exposure.
D. personnel should take a reading with a survey meter before entering the exposure area.
Characteristic X-ray radiation provides the spectrums as followings except
A. Characteristic X-ray radiation is a discrete emission spectrum.
B. Characteristic X-ray radiation changes its energy when tube voltage varies.
C. Given the same amount of electron flow, a high tube voltage grants higher X-ray intensity.
D. In mammography over 80% radiation is caused by characteristic radiation.
The ratio of heat produced to x-rays produced in a typical diagnostic target is about
A. 1:99
B. 10:90
C. 50:50
D. 99:1
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