20.
How many exposures per minute can be made with safety when the cooling rate is
27,000 heat units per minute, the tube is at maximum heat, and the following
technique is used: 90 kVp; 150 mA; 3/10 second, on a single phase full-wave
machine?
a. 4.
b. 5.
c.
6.
d. 66.
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MD0950
3-31