19.
What kind of rectification is achieved when using a single-phase, self-rectifying
x-ray machine system?
a. Full-wave.
b. Half-wave.
c.
Mechanical.
d. Automatic.
20.
If a spinning top is used to check a half-wave rectified, single-phase x-ray
machine (60 cycles per second) and a 1/20-second exposure is used, how many
dots should show on the film?
a. 3.
b. 6.
c.
8.
d. 12.
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MD0950
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