ARDMS SPI Exam Review TEST 16

October 28, 2017 By Rana Waqar Leave a Comment

1. What provides the potential energy in the cardiovascular system?
- a. Distal arterioles
- b. Blood flowing through the vessels
- c. Beating heart
- d. Venous system
2. What is another term for gravitational potential energy?
- a. Kinetic energy
- b. Viscous energy
- c. Inertial energy
- d. Hydrostatic pressure
3. What is the name of the flat flow profile that is seen at the entrance of vessels?
- a. Plug flow
- b. Laminar flow
- c. Turbulent flow
- d. Chaotic flow
4. What does increasing the PRF/scale setting on a spectral Doppler do?
- a. Increases the potential of aliasing
- b. Decreases the potential of aliasing
- c. Makes the spectral waveform appear larger
- d. Optimizes the system to detect slow flow
5. Which of the following is seen with continuous-wave instrumentation?
- a. Transducer frequency matches that of the oscillator
- b. Sample depth can be determined by a range gate
- c. Very short pulses are used
- d. Aliasing limits velocity measurements
6. When is the Doppler shift highest?
- a. Doppler shift is unrelated to beam angle
- b. When the beam is perpendicular to the direction of flow
- c. When the beam is parallel to the direction of flow
- d. When the beam is at a 45_ angle to flow
7. Which of the following will not eliminate aliasing?
- a. Increasing the PRF
- b. Increasing the Nyquist limit above the frequency shift
- c. Decreasing the sample depth
- d. Increasing the frequency shift above the Nyquist limit
8. When a reflector moves toward the transducer, what will happen to the reflected frequency?
- a. Increase
- b. Decrease
- c. Stay the same
- d. It is not possible to predict
9. Which of the following has to be increased in order to see an increase in flow volume?
- a. Pressure difference
- b. Resistance
- c. Vessel length
- d. Viscosity
10. Adjusting which of the following will have no effect on the measured frequency shift?
- a. Flow velocity
- b. Operating frequency
- c. Amplitude
- d. Propagation speed

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