Understanding ultrasound physics Ch 1-
5 review exam questions with Complete
solutions
Directly related means - ANSWER-When one item increases or decreases, the second
item, responds the same direction
Two quantities are directly proportional if an increase in one quality leads to a/an
___________ in the other. - ANSWER-Increase
Proportionally related means - ANSWER-Two items are related but the relationship is
not specific
Inversely related means - ANSWER-Items are related so that the change in one creates
an opposite change in the other
A reciprocal relationship means that - ANSWER-the items are inversely related
when one item increases or decreases , the other item does the opposite
when the reciprocals are multiplied , the result is one a
What term is the reciprocal of mega? - ANSWER-micro
Which is not a measure of area ? - ANSWER-Cubic meters
A measurement of 40 mm can also be expressed as - ANSWER-4.0 cm
If you measure a cystic structure , what is an expected value for the volume ? -
ANSWER-6 cm³
What is the reciprocal of 5 ? - ANSWER-1/5
A sack contains 6 pounds of flour . The contents of the bag are increased by a factor of
5. How much flour is in the bag ? - ANSWER-30 pounds
A bouquet has 30 flowers . The size of the bouquet is decreased by a factor -
ANSWER-10
Sound waves are - ANSWER-Longitudinal mechanical
Which of the following frequencies is closest to the lower limit of ultrasound ? -
ANSWER-25,000 Hz
lower Waves transfer _____________ from one location to another - ANSWER-Energy
, Which BEST describes sound waves - ANSWER-Series of compressions and
rarefactions
If the direction of particle motion in a wave is perpendicular to the direction of
propagation of the wave, the wave is - ANSWER-Transverse
Sound can be described as - ANSWER-Cyclical oscillations within a set of variables ( A
wave is the rhythmical variation throughout time ) .
Which of the following terms does not belong with the others ? - ANSWER-a .
Compression
b Region of high density
c. Region of increased pressure
D Wider molecular spacing 👍
Which of the following waves is infrasonic ? - ANSWER-2 Hz
Which waves are audible ? - ANSWER-28 Hz ( audible range is 20 Hz to 20 kHz )
Wavelength is a measure of - ANSWER-Distance
In order to be identified as ultrasound , the frequency of a wave must be greater than -
ANSWER-20 kHz
Which of these waves is most useful in diagnostic sonography ? - ANSWER-4 MHz
The unit of measurement for wave frequency is a measurement of - ANSWER-number
The frequency of a transducer is 25,000,000 cycles per second . This can be written as
- ANSWER-25 MHz
Frequency is - ANSWER-a . inversely related to period
b . the reciprocal of period
c.the number of cycles per second
d all of the above 👍
Which is a definition of period ? - ANSWER-The time for one complete cycle to occur
Lower frequency waves create higher image quality and better detail . - ANSWER-false
Which is not an acoustic variable ? - ANSWER-Intensity
What units are used to report the pressure of a sound beam ? - ANSWER-a . Pounds /
sq in
b . Pascals ( Pa )
5 review exam questions with Complete
solutions
Directly related means - ANSWER-When one item increases or decreases, the second
item, responds the same direction
Two quantities are directly proportional if an increase in one quality leads to a/an
___________ in the other. - ANSWER-Increase
Proportionally related means - ANSWER-Two items are related but the relationship is
not specific
Inversely related means - ANSWER-Items are related so that the change in one creates
an opposite change in the other
A reciprocal relationship means that - ANSWER-the items are inversely related
when one item increases or decreases , the other item does the opposite
when the reciprocals are multiplied , the result is one a
What term is the reciprocal of mega? - ANSWER-micro
Which is not a measure of area ? - ANSWER-Cubic meters
A measurement of 40 mm can also be expressed as - ANSWER-4.0 cm
If you measure a cystic structure , what is an expected value for the volume ? -
ANSWER-6 cm³
What is the reciprocal of 5 ? - ANSWER-1/5
A sack contains 6 pounds of flour . The contents of the bag are increased by a factor of
5. How much flour is in the bag ? - ANSWER-30 pounds
A bouquet has 30 flowers . The size of the bouquet is decreased by a factor -
ANSWER-10
Sound waves are - ANSWER-Longitudinal mechanical
Which of the following frequencies is closest to the lower limit of ultrasound ? -
ANSWER-25,000 Hz
lower Waves transfer _____________ from one location to another - ANSWER-Energy
, Which BEST describes sound waves - ANSWER-Series of compressions and
rarefactions
If the direction of particle motion in a wave is perpendicular to the direction of
propagation of the wave, the wave is - ANSWER-Transverse
Sound can be described as - ANSWER-Cyclical oscillations within a set of variables ( A
wave is the rhythmical variation throughout time ) .
Which of the following terms does not belong with the others ? - ANSWER-a .
Compression
b Region of high density
c. Region of increased pressure
D Wider molecular spacing 👍
Which of the following waves is infrasonic ? - ANSWER-2 Hz
Which waves are audible ? - ANSWER-28 Hz ( audible range is 20 Hz to 20 kHz )
Wavelength is a measure of - ANSWER-Distance
In order to be identified as ultrasound , the frequency of a wave must be greater than -
ANSWER-20 kHz
Which of these waves is most useful in diagnostic sonography ? - ANSWER-4 MHz
The unit of measurement for wave frequency is a measurement of - ANSWER-number
The frequency of a transducer is 25,000,000 cycles per second . This can be written as
- ANSWER-25 MHz
Frequency is - ANSWER-a . inversely related to period
b . the reciprocal of period
c.the number of cycles per second
d all of the above 👍
Which is a definition of period ? - ANSWER-The time for one complete cycle to occur
Lower frequency waves create higher image quality and better detail . - ANSWER-false
Which is not an acoustic variable ? - ANSWER-Intensity
What units are used to report the pressure of a sound beam ? - ANSWER-a . Pounds /
sq in
b . Pascals ( Pa )
