The shell and corresponding electron binding energies of a Tungsten atom are listed below.  Projectile electrons must have an energy of at least ____ keV to produce K-characteristic x-rays from tungsten. Shell:               K                L                M                N Energy:          69.5           12.1            2.8              0.6

Refer to the following radiographic tube rating chart.  What is the maximum mA station that can be employed for a .01 second exposure at 125 kVp? Tube rating chart.jpg

What are the heat units if an exposure is made with a high-frequency circuit with technical factors of 110 kVp, 200 mA, and 0.05 seconds?

Which of the following are located on the secondary, high-voltage side of the x-ray circuit? Ground Secondary side of the step up transformer Kilovolt meter Filament ammeter Rectifiers Rheostat

Which of the following voltage waveforms accurately demonstrates a high frequency circuit? figure_4.14 labeled(2).jpg

Which of the following statements is/are true? The lower set of collimator shutters aid in reducing stem radiation. Focal spot blooming refers to an increase in focal spot size that may occur with very high mA settings. The anode serves to conduct high voltage from the cathode back into the x-ray circuitry. The space charge effect limits x-ray tubes to maximum mA ranges of 500 to 800 mA.

What type of radiation is composed of x-ray photons not produced at the focal spot?

When a meter is connected in parallel, it measures ____ and is referred to as a ____.

The physical area of the focal track affected by the electron beam is the ____.

Refer to the following emission spectrum.  Number 1 indicates the original technique employed for an exposure and Number 2 indicates the corresponding technique change.  What technique change is signified in this illustration? figure_6.6 labeled #1.jpg