WITH QUESTIONS AND CORRECT DETAILED
VERSION A
1. An image is bright in the near field but darker in the far field. Which
process is responsible for this effect?
A) Propagation speed variations
B) Digital scan conversion
C) Acoustic attenuation
D) Refraction - ANSWER-C) Acoustic attenuation
2. If a calcification is present but there is not much shadowing, what can
you adjust to demonstrate more of the shadow?
A) Decrease line density
B) Adjust focal position to low
C) Increase frequency
D) Increase gain - ANSWER-C) Increase frequency
3. Which statement refers to the process of phasing?
,A) Electronic beam steering
B) Acoustic lens
C) Electronic focusing
D) Mechanical movement of the probe - ANSWER-A) Electronic beam
steering
4. Which of the following is used to control elevational resolution in a 2D
transducer?
A) Bandwidth
B) Axial resolution
C) Lens
D) Beam former - ANSWER-D) Beam former
5. The conversion of an incident pressure wave into an electrical signal is
called:
A) Snell's law.
B) piezoelectric effect.
C) Huygen's principle.
D) Curie effect. - ANSWER-B) piezoelectric effect.
,6. Electronic focusing in transmit mode uses:
A) changeable lens.
B) curved element.
C) time delays to excite transducer elements.
D) high pulse repetition frequency. - ANSWER-C) time delays to excite
transducer elements.
7. Which transducer would you select for maximum penetration?
A) 3 MHz curvilinear
B) 4 MHz phased array
C) 8 MHz linear phased array
D) 10 MHz tightly curved array - ANSWER-A) 3 MHz curvilinear
8. The transducer component responsible for the timing and order of the
sequence is:
A) impedance matching layer.
B) beam former.
C) elevational resolution.
, D) PZT. - ANSWER-B) beam former.
9. What demonstrates how much magnification will occur in the receiver?
A) Rectification
B) Gain
C) Output power
D) PRF - ANSWER-B) Gain
10. When adjusting the output power, which of the following system
controls is affected?
A) Pulser
B) Beam former
C) Signal processor
D) Reciever - ANSWER-A) Pulser
11. What commonly caused localized non-uniformity along the vertical
axis in a B-mode image?
A) Poor lateral resolution
B) Improper TGC setting