Question 1

What occurs when the pulse repetition frequency is less than twice the Doppler shift frequency?

Options :

A : Spectral broadening

B : Range ambiguity

C : Aliasing

D : Propagation speed artifact

Answer: C

Question 2

What is the primary interaction that occurs when sound waves encounter a smooth, flat surface?

Options :

A : Attenuation

B : Reflection

C : Diffraction

D : Interference

Answer: B

Question 3

Which change can be made in order to avoid exceeding the Nyquist limit?

Options :

A : Increase output power

B : Decrease output power

C : Increase pulse repetition frequency

D : Decrease pulse repetition frequency

Answer: C

Question 4

What is the relationship between overall gain and image brightness?

Options :

A : The higher the overall gain, the brighter the image

B : The lower the overall gain, the brighter the image

C : The higher the overall gain, the darker the image

D : There is no relationship between overall gain and image brightness

Answer: A

Question 5

What happens to the amount of attenuation if the path length is doubled?

Options :

A : Quadrupled

B : Doubled

C : Halved

D : Quartered

Answer: B

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