11.According to federal standards, a 90-kVp beam requires which of the following measurements to be the equivalent of aluminum of total filtration to minimize soft radiation exposure to patients?
12.Which type of generator will produce the greatest effective tube current when identical exposure factors are used?
a.Single-phase, half-wave rectified
b.Single-phase, full-wave rectified
e.100 KHz high frequency
13.What is the function of the high voltage circuit within the x-ray tube?
a.To drive electrons from cathode to anode
b.To select filament size
c.To create a space charge for x-ray production
d.To rectify filament current
e.To activate the rotor
14.Why is rectification of AC to DC important to the operation of the x-ray tube?
a.To reduce the heel effect
b.To help maintain a small effective focal spot
c.To save on electricity
d.To protect the cathode side of the tube from electron bombardment
e.To reduce the electrical load on the anode
15.The penetration of the x-ray beam is increased under which condition?
a.As kVp is decreased
b.As kVp is increased
c.As mA is decreased
d.As mA is increased
e.As time is increased
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