EXERCISES, LESSON 2
INSTRUCTIONS: Answer the following exercises by marking the lettered response that
BEST answers the question or BEST completes the incomplete statement.
After you have answered all of the exercises, turn to "Solutions to Exercises" at
the end of the lesson and check your answers. For each exercise answered incorrectly,
reread the lesson material referenced after the solution.
What voltage extremes are tolerable for safe and normal operation of the
a. 190 to 270vdc.
b. 15 to 24vdc.
100 to 120vac.
d. 190 to 270vac.
What prevents "ringing" in the high-tension waveform?
a. Zenering of the high-voltage diode.
b. A 0.375Ω resistor upon selection of low ma stations.
The contact resistance of Re-20 which is the line contactor.
d. Thyrites for over-voltage protection.
What allows a single high-tension transformer to accommodate two X-ray tubes?
a. The control is connected to the high-tension transformer by two
b. The changeover switch.
The overload circuit.
variable resistor load.