Fundamentals MRO #4 Quizzes || ANSWERED
1.What increases voltage to kilovoltage in the x-ray circuit?
Step-up transformer
Incoming voltage regulator
mA - Correct Answer step-up transformer
2.All photons produced in an x-ray beam will have the same ability to penetrate.
true or false - Correct Answer false
3.Which set of technical factors will produce the greatest density?
50 kVp @ 10 mAs
60 kVp @ 10 mAs
70 kVp @ 10 mAs
80 kVp @ 10 mAs - Correct Answer 80 kVp @ 10 mAs
Generally, we look at the mAs value to determine which will produce the greatest density (the
greater the mAs, the greater the density), but kVp strongly influences density through its control
of photon energy (the greater the penetration, the greater the resultant density). In this case,
we look to the highest kVp to determine the greatest density.
4.All of the following will render a diagnostic image. Which set of factors will provide the lowest
contrast?
60 kVp @ 40 mAs
70 kVp @ 20 mAs
80 kVp @ 10 mAs
, 90 kVp @ 5 mAs - Correct Answer 90 kVp @ 5 mAs
Of the factors listed, we look to kVp for the answer. The higher the kVp, the lower the scale of
contrast
5. In the filament circuit, voltage is stepped down before passing to the filament.
true or false - Correct Answer true
In the filament circuit, a step-down transformer is used to decrease voltage and increase current
before the power passes to the filament in the x-ray tube.
6. mAs controls density by controlling which of the following?
Number of electrons boiled off of the filament
Energy of the filament electrons
The heat produced in the anode
The amount of scatter radiation generated - Correct Answer Number of electrons boiled off of
the filament
7. All other factors remaining constant, which mAs value will result in the highest patient dose?
20
30
40
50 - Correct Answer 50
1.What increases voltage to kilovoltage in the x-ray circuit?
Step-up transformer
Incoming voltage regulator
mA - Correct Answer step-up transformer
2.All photons produced in an x-ray beam will have the same ability to penetrate.
true or false - Correct Answer false
3.Which set of technical factors will produce the greatest density?
50 kVp @ 10 mAs
60 kVp @ 10 mAs
70 kVp @ 10 mAs
80 kVp @ 10 mAs - Correct Answer 80 kVp @ 10 mAs
Generally, we look at the mAs value to determine which will produce the greatest density (the
greater the mAs, the greater the density), but kVp strongly influences density through its control
of photon energy (the greater the penetration, the greater the resultant density). In this case,
we look to the highest kVp to determine the greatest density.
4.All of the following will render a diagnostic image. Which set of factors will provide the lowest
contrast?
60 kVp @ 40 mAs
70 kVp @ 20 mAs
80 kVp @ 10 mAs
, 90 kVp @ 5 mAs - Correct Answer 90 kVp @ 5 mAs
Of the factors listed, we look to kVp for the answer. The higher the kVp, the lower the scale of
contrast
5. In the filament circuit, voltage is stepped down before passing to the filament.
true or false - Correct Answer true
In the filament circuit, a step-down transformer is used to decrease voltage and increase current
before the power passes to the filament in the x-ray tube.
6. mAs controls density by controlling which of the following?
Number of electrons boiled off of the filament
Energy of the filament electrons
The heat produced in the anode
The amount of scatter radiation generated - Correct Answer Number of electrons boiled off of
the filament
7. All other factors remaining constant, which mAs value will result in the highest patient dose?
20
30
40
50 - Correct Answer 50
