Exam Questions And Answers
1. wavelength - ANSWER is the distance covered by one cycle.
2. period - ANSWER is the time to complete one cycle.
3. scattering - ANSWER is a redirection of an ultrasound beam in many directions as boundary
between two media.
4. A single element transducer is focused by
A. By the manufacturer
B. Cannot be focused
C. By increasing power
D. By the sonographer - ANSWER A.
5. *In the analog converter, what component stores the image data?
a) computer memory
b) video tape recorder
c) diaeletric matrix
d) none of the above - ANSWER C
6. Which of the following will result in the highest mechanical index?
A. High frequency, low power
B. High intensity and high frequency
C. Low frequency and high signal amplitude
D. Low intensity and low frequency - ANSWER C. Low frequency and high signal amplitude
7. Which of these factors has the greatest influence on pulse repetition.?
A. display depth
B. thickness of the PZT crystal
, C. attenuation of the sound beam
8. D. impedance of the medium E displayed dynamic range. - ANSWER A. Display depth
9. As the impedance of two media become vastly different , the:
A. Reflection increases
B. Transmission increases
C. refractions increase
D. Absorption increases - ANSWER A
E.
10. An ultrasound system is set to 0db and is transmitting at full intensity. What is the output power
when the system is transmitting at 10% of full intensity?
A. -3dB
B. -50 dB
C. 40 dB
D. 3 dB
E. -10 dB - ANSWER -10Db
F.
11. A single element transducer is focused by
A. By the manufacturer
B. Cannot be focused
C. By increasing power
D. By the sonographer - ANSWER A.
12. With normal incidents, what factors affect refraction of ultrasound?
A. propagation speeds
B.
13. frequencies
c. attenuation coefficient
D. none of the above - ANSWER D
14. An ultrasound system is set to 0db and is transmitting at full intensity. What is the output power
when the system is transmitting at 10% of full intensity?
A. -3dB
B. -50 dB
C. 40 dB
D. 3 dB
E. -10 dB - ANSWER -10dB