
chpt 4 " describing pulsed waves"
Quiz
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Physics
•
University
•
Easy
Stephanie Castillo
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47 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these four values for pulse repetition frequency would have the longest pulse repetition period?
2 kHz
4,000 HZ
6 Hz
1 kHz
Answer explanation
6 Hz. Pulse repetition period is the reciprocal of pulse repetition frequency. This choice has the lowest pulse repetition frequency and, thus, the longest pulse repetition period.
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
pulse duration is directly proportional to _______
(could be more than one)
# cycles in the pulse
frequency
period
all of these
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
- actual time from the start of a pulse to the end of that pulse
- talking, or "on" time
- units of time, such as microseconds (us).
- typical value : 0.3-2.0(us)
- determined by sound source only , NOT adjustable
pulse duration
spatial pulse length
pulse repetition period
pulse repetition frequency
duty factor
4.
CLASSIFICATION QUESTION
3 mins • 1 pt
A sonographer is using a 3 MHz transducer and changes to a 6 MHz transducer. The imaging depth remains unchanged. Would each of the following parameters increase, decrease, or remain the same?
Groups:
(a) remains the same
,
(b) increase
,
(c) decrease
PRP
PRF
period
intensity
speed
wavelength
frequency
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following describes line E?
frequency
pulse rep. period
period
pulse duration
none of the above
Answer explanation
Line E represents only the listening time.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of pulse is more desirable in diagnostic imaging ?
Shorter duration pulses are desirable for imaging because they create images of greater accuracy.
longer duration pulses are desirable for imaging because they create images of greater accuracy.
thinner duration pulses are desirable for imaging because they create images of greater accuracy.
thicker duration pulses are desirable for imaging because they create images of greater accuracy.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following describes line A?
frequency
pulse repetition period
pulse duration
period
duty factor
Answer explanation
If the units for line A are time, line A is a pulse duration.
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