# Comprehensive SPI Practice Test

180 Questions | Total Attempts: 1944  Settings  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

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