ARDMS ULTRASOUND PHYSICS & INSTRUMENTATION PRACTICE EXAM
PART 3 2026| WITH VERIFIED QUESTIONS AND ANSWERS
(GUARANTEED GRADE +)
1. Which of the following is defined as only the active time?
Pulse duration
2. Which of the following is defined as the number of ultrasound pulses
emitted in 1 second?
Pulse repetition frequency (PRF)
3. Which of the following is described as the ability of an object to resist
compression and relates to the hardness of a medium?
Stiffness
4. Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain
a. transmit
5. The inertia of the medium describes its:
Density
6. Areas of high pressure and density are referred to as:
Compressions
7. The average speed of sound in soft tissue is:
1540m/s; 1.54km/s; 1.54mm/us
8. The best way to increase the near field length of an ultrasound beam is
to:
increase transducer diameter
9. A strongly focused transducer implies a:
a. short focal length; decreased beam divergence
b. medium focal length; increased beam divergence
c. long focal length; no beam divergence
d. short focal length; increased beam divergence
d. short focal length; increased beam divergence
10.The most common type of transducer used in echo is:
sector phased array
11.What are the four acoustic variables:
temperature, density, particle motion, pressure
, 12.The range of frequencies produced by a damped PZT element is called:
a. fundamental frequencies
b. Q Factor
c. near field
d. bandwidth
d. bandwidth
13.Which of the following is determined by the sound source and medium?
Wavelength
14.All of the following are true of stiffness except:
Stiffness and propagation speed are indirectly associated
15.Which of the following describes the amount of refraction that occurs at
an interface?
Snell's law
16.If pulse repetition frequency increases, then the duty factor:
Increases
17.An increase in overall gain will result in all of the following except:
a. increase in image brightness
b. increase in output power
c. increase in amplification of the returning signal
d. decrease risk in bioeffects
b. increase in power
18.The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz
b. 20,000 Hz
19.Density and propagation speed are:
Inversely related
20.Spatial pulse length can be calculated by:
Multiplying the number of cycles times the wavelength
21.Reject eliminates:
low amplitude signals
22.The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
PART 3 2026| WITH VERIFIED QUESTIONS AND ANSWERS
(GUARANTEED GRADE +)
1. Which of the following is defined as only the active time?
Pulse duration
2. Which of the following is defined as the number of ultrasound pulses
emitted in 1 second?
Pulse repetition frequency (PRF)
3. Which of the following is described as the ability of an object to resist
compression and relates to the hardness of a medium?
Stiffness
4. Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain
a. transmit
5. The inertia of the medium describes its:
Density
6. Areas of high pressure and density are referred to as:
Compressions
7. The average speed of sound in soft tissue is:
1540m/s; 1.54km/s; 1.54mm/us
8. The best way to increase the near field length of an ultrasound beam is
to:
increase transducer diameter
9. A strongly focused transducer implies a:
a. short focal length; decreased beam divergence
b. medium focal length; increased beam divergence
c. long focal length; no beam divergence
d. short focal length; increased beam divergence
d. short focal length; increased beam divergence
10.The most common type of transducer used in echo is:
sector phased array
11.What are the four acoustic variables:
temperature, density, particle motion, pressure
, 12.The range of frequencies produced by a damped PZT element is called:
a. fundamental frequencies
b. Q Factor
c. near field
d. bandwidth
d. bandwidth
13.Which of the following is determined by the sound source and medium?
Wavelength
14.All of the following are true of stiffness except:
Stiffness and propagation speed are indirectly associated
15.Which of the following describes the amount of refraction that occurs at
an interface?
Snell's law
16.If pulse repetition frequency increases, then the duty factor:
Increases
17.An increase in overall gain will result in all of the following except:
a. increase in image brightness
b. increase in output power
c. increase in amplification of the returning signal
d. decrease risk in bioeffects
b. increase in power
18.The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz
b. 20,000 Hz
19.Density and propagation speed are:
Inversely related
20.Spatial pulse length can be calculated by:
Multiplying the number of cycles times the wavelength
21.Reject eliminates:
low amplitude signals
22.The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
