Comprehensive SPI Practice Test
Sonographic Principles & Instrumentation
- 1.Sound waves are
- A.
Electric
- B.
Mechanical transverse
- C.
Spectral
- D.
Longitudinal mechanical
- 2.The speed of US in soft tissue is closest to
- A.
1.540 km/sec
- B.
1.54 km/msec
- C.
1.500 m/s
- D.
1.540 mm/sec
- 3.The frequency closest to the lower limit of US is
- A.
19.000 kHz
- B.
10.000 MHz
- C.
20.000 msec
- D.
15.000 Hz
- 4.Which is not an acoustic variable?
- A.
Density
- B.
Pressure
- C.
Distance
- D.
Intensity
- 5.The effects of soft tissue on US are called:
- A.
Acoustic proliferation properties
- B.
Dynamic effects
- C.
Acoustic propagation properties
- D.
Biologic effects
- 6.All of the following are true EXCEPT:
- A.
Two waves with identical frequencies must interfere constructively
- B.
Constructive inferference is associated with waves that are in-phase
- C.
Out-of-phase waves inferfere destructively
- D.
Waves of different frequencies may exhibit both constructive and destructive interference at different times
- 7.Put in decreasing order
- A.
Deca
- B.
Deci
- C.
Micro
- D.
Centi
- 8.______ is the time to complete on cycle
- A.
Pulse duration
- B.
Pulse period
- C.
Period
- D.
Duration period
- 9.Which of the following sound waves is ultrasonic and least useful in diagnostic imaging?
- A.
30 KHz
- B.
8 MHz
- C.
8.00 Hz
- D.
3.00 kHz
- E.
15 Hz
- 10.What is the frequency of a wave with 1 msec period?
- A.
10.00 Hz
- B.
1.00 kHz
- C.
1 kHz
- D.
1 MHz
- 11._____ is the distance covered by one cycle.
- A.
Pulse length
- B.
Wavelength
- C.
Cycle distance
- D.
Cycle duration
- 12.Which of the following is determined by the source and the medium?
- A.
Frequency
- B.
Period
- C.
Propagation speed
- D.
Range resolution
- 13.Propagation speed = _______ x wavelength
- A.
Pulse duration
- B.
Period
- C.
Number of cycles in the pulse
- D.
Frequency
- 14.As a result of _____ the propagation speed increases.
- A.
Increasing stiffness and increasing density
- B.
Increasing stiffness and increasing elasticity
- C.
Decreasing compressibility and decreasing density
- D.
Decreasing stiffness and decreasing density
- 15.Sound waves carry energy
- A.
True
- B.
False
- 16.Sound waves are longitudinal waves sound travels in a straight line
- A.
True
- B.
False
- 17.What are the acousitic variables?
- A.
Pressure, density, distance
- B.
Period, frequency, amplitude, power, intensity, wavelength, propagation speed
- 18.What are the acoustic parameters?
- A.
Pressure density distance
- B.
Period frequency amplitude power intensity wavelength propagation speed
- 19.A pair of waves are considered out of phase when their peaks occur at the same time and location
- A.
True
- B.
False
- 20.Infrasound is?
- A.
- B.
Between 20 Hz & 20 kHz
- C.
>20 kHz
- 21.Period and frequency are determined by?
- A.
Sound source
- B.
Sound source and medium
- C.
Medium
- 22.Period and frequency are
- A.
Inversely
- B.
Directly
- C.
Proportional
- D.
Reciprocal
- 23.Amplitude has which units?
- A.
Acoustic variables
- B.
Watts
- C.
Energy
- 24.Amplitude , power, intensity are determined by the
- A.
Medium
- B.
Sound source
- C.
Both sound source and medium
- 25.Amplitude, power, intensity are not adjustable
- A.
True
- B.
False
Questions: 150 | Attempts: 31298 | Last updated: Mar 22, 2022
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