X-ray Imaging System Power and Voltage Ripple

Identify the main differences among single-phase, three-phase, and high-frequency power.

• Single-phase has one waveform, three-phase has three waveforms, and high-frequency power operates at higher frequencies than standard power systems.

• Single-phase and three-phase both have three waveforms, but high-frequency power has only one.

• Single-phase and high-frequency power are the same, while three-phase is different.

• Three-phase power operates at lower frequencies than single-phase and high-frequency power.

The importance of voltage ripple to x-ray quantity and quality is:

• It affects both the amount and the energy consistency of x-rays produced.

• It only affects the color of the x-rays.

• It has no impact on x-ray production.

• It only affects the size of the x-ray machine.

The power rating of an x-ray imaging system is defined as:

• the product of tube voltage and tube current

• the amount of radiation produced per second

• the maximum exposure time allowed

• the efficiency of image processing

What is the frequency of AC current?

• 50 cycles/sec

• 60 cycles/sec

• 100 cycles/sec

• 120 cycles/sec

One complete cycle of AC current takes ________ seconds.

• 1/60th second

• 1/100th second

• 1/50th second

• 1/10th second

In one second, AC goes through how many cycles?

• 30 cycles

• 60 cycles

• 90 cycles

• 120 cycles

In one second, AC changes direction how many times?

• 120 times

• 60 times

• 100 times

• 240 times

How long does one complete cycle of the sine wave take?

• 1/60th second

• 1/100th second

• 1/120th second

• 1/30th second

What do diodes allow electricity (current) to do?

• Flow in both directions

• Flow in only one direction

• Block electricity completely

• Convert DC to AC

What is the process called when a diode converts AC to DC?

• Amplification

• Rectification

• Filtration

• Modulation