16.
The size of the actual focal spot affects:
a. Line focus.
b. Picture size.
c.
Heat loading capacity.
d. Rotation of the anode.
17.
A device for shortening exposure times by cutting out part of the sine wave is a:
a. Photon activator.
b. Tungsten target.
c.
Copper anode.
d. Grid-controlled tube.
18.
The maximum single-exposure factors for an x-ray tube are obtained from
a. A universal tube chart.
b. A tube rating chart pertaining to that tube.
c.
A housing cooling chart.
d. A heat unit chart.
19.
How many HU (heat units) would be generated by one exposure using 95 kVp,
100 mA, and 1/2 second on a single phase, full-wave machine?
a. 950 HU.
b. 1,500 HU.
c.
3,000 HU.
d. 4,750 HU.
MD0950
3-30