EDELMENS SPI EXAM COMPLETE 350

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EDELMEN'S SPI EXAM COMPLETE 350

QUESTIONS AND CORRECT DETAILED

ANSWERS (VERIFIED ANSWERS) |ALREADY

GRADED A+

Question: Sound waves are:

• electric
• mechanical, transverse
• spectral
• longitudinal, mechanical

ANSWER: D

Question: The speed of sound of ultrasound in soft tissue is

closest to:

• 1,540 km/sec
• 1.54 km/sec
• 1,500 m/s
• 1,540 mm/sec

ANSWER: C

Question: Which is not an acoustic variable?

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• density
• pressure
• distance
• intensity

ANSWER: D

Question: The effects of soft tissue on ultrasound are called:

• acoustic proliferation properties
• dynamic effects
• acoustic propagation properties
• biological effects

ANSWER: C

Question: All of the following are true EXCEPT:

• two waves with identical frequencies must interfere

constructively.

• constructive interference is associated with waves that are in-

phase.

• out-of-phase waves interfere destructively.
• waves of different frequencies may exhibit both constructive

and destructive interference at different times.

ANSWER: A

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Question: Put in decreasing order:

• deca
• deci
• micro
• centi

ANSWER: abdc (corrected order: a, d, b, c - deca, centi, deci, micro)

Question: ______ is the time to complete one cycle

• pulse duration
• pulse period
• period
• duration period

ANSWER: C

Question: Which of the following sound waves is ultrasonic and

least useful in diagnostic imaging?

• 30 KHz
• 8 Mhz
• 8,000 Hz
• 3,000 Hz

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• 15 Hz

ANSWER: A

Question: ______ is the distance covered by one cycle.

• pulse length
• wavelength
• cycle distance
• cycle duration

ANSWER: B

Question: Which of the following is determined by the source

and the medium?

• frequency
• period
• propagation speed
• range resolution

ANSWER: C (corrected from D based on ultrasound physics

principles)

Question: Propagation speed = _______ x wavelength

• pulse duration
• period