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Edelman 1-6
Test
| Question | Answer |
|---|---|
| How are the size of a tree and it's age related | Directly |
| How are the height of a person and the color of his automobile related | unrelated |
| how is the age of a loaf of bread related to it's freshness | inversely |
| Which of the following is an appropriate unit for area | square yards |
| Which of the following is not an appropriate unit for volume | cm |
| List the metric terms in increasing order | Micro,milli,deci,deca,hecto,mega |
| List these metric terms in decreasing order | giga,kilo,hecto,centi,micro,nano |
| How many millimeters are in 8 liters | 8000 (mili means thousands) |
| How many centimeters are in 3 meters | 300 (centi means hundredth and there are 100 centimeters in 1 meter |
| How many kilometers are in 3000 meters | 3 kilo means thousand |
| What is the reciprocal of 100 | 1/100 or 0.01 |
| what is the reciprocal of 1/8 | 8 |
| How many Hertz is 3 MHz | 3,000,000 |
| How many millimeters are contained in a jar filled with 5 liters of fluid | 5000 |
| how many liters are contained in 80 ml of fluid | 0.080 |
| how much bigger is 1000 then 10 | 100 times |
| how much bigger is a billon than a million | 1000 times |
| how much smaller is a hundred than a thousand | 1/10 (one tenth) |
| what do waves transfer from one location to another | waves carry energy from place to place |
| Which of the following best describes sound waves | sound waves are a series of compressions and rarefractions |
| Which of the following terms does not belong with the other | wide molecular spacing |
| Variations in all of the following identify specific waves as acoustic except | parameters |
| what identifies specific waves as acoustic | pressure, density, acoustic variables |
| All of the following are true of sound waves except | they are not transverse (they are longitudinal) |
| All of the following are acoustic parameters except | Pressure |
| Considered acoustic parameters | period, propagation,frequency |
| Best Describes sound waves | longitudinal, pressure waves |
| Two waves are traveling in a medium and arrive at a location at the same time. What event takes place | interference |
| Units that are used to report the pressure of a sound beam | Pascals (Pa) |
| Which waves will exhibit both constructive and destructive | waves of different frequency |
| What are the units of wavelength | millimeters |
| What are the units of frequency | Hertz |
| What are the units of intnesity | watts/cm2 |
| What are the units of propagation speed | meters/second |
| What are the units of period | second |
| What are the units for power | watts |
| Does the medium or the sound source determine these parameters?Wavelength | both |
| Does the medium or the sound source determine these parameters? frequency | sound source |
| Does the medium or the sound source determine these parameters? intensity (initial) | sound source |
| Does the medium or the sound source determine these parameters?Propogation speed | medium source |
| Does the medium or the sound source determine these parameters? period (initial) | sound source |
| Does the medium or the sound source determine these parameters? amplitude (initial) | Sound source |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator. Wavelength | cannot |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator. frequency | cannot |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator. intensity | can |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator.propagation speed | cannot |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator. period | cannot |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator.power | can |
| Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator.amplitude (initial) | can |
| True or False A wave with a frequency of 15,000 MHz is ultrasonic | True |
| True or False If the amplitude of a wave is increased to 3 times it's original value the intensity is increased by 6 times | False |
| (true false)If the power of a wave is halved the intensidy is reduced to one fourth its original value | False |
| (T/F) Propagation speed increases as frequency increases | false |
| Medium 1 has density of 9 and stiffness of 6 Medium 2 has density of 8 and stiffness of 6, In which medium will sound travel slower? | Medium 1 since both media have same stiffness (don't think my mind in not in the gutter while typing this-roflmao)but the medium with greater density has lower propagation speed. |
| which of the following characteristics will create the fastest speed of sound | low density, high stiffness |
| which of the following characteristics will create the slowest speed of sound | high density, low stiffness |
| If the power in a beam is 1 watt, and the area is 5cm2 what is the beams intensity | 0.2 W/cm2 |
| If intensity remains the same while the power is doubled, what has happened to the beam area? | doubled |
| A sound beam travles a total of 10 cm in 2 seconds. What is the speed of the sound | 5 cm/sec (10 cm/2 sec=5cm) |
| (t/f)Propagation speed increases as the frequency increases | False |
| (t/f)Propagation speed increases as frequency decreases | False |
| t/f Propagation speed does not change as frequency increases | True Propagation speed and frequency are unrelated. |
| What is the wavelength of a 3 Mhz sound in soft tissue? | 0.51 mm |
| What is the wavelength of a wave with an unknown frequency traveling in soft tissue | 0.51mm |
| The effects of sound waves on tissue in the body are called | bioeffects |
| These are all acoustic bariables | density,particle motion,pressure |
| Which are considered acoustic parameters. | frequency, period |
| The effects of a medium on an ultrasound wave is called | Acoustic propagation properties |
| Pulse repetition frequency is the reciprocal of? | Pulse repetition period |
| By changing the imageing depth, which of the following does the operator also change | Pulse repetition frequency, duty factor, pulse repetition period |
| The speed of a 5 MHz continuous wave is 1.8 km/sec. The wave is then pulsed with a duty factor of 0.5. Calculate the new propagation speed | propagatin speed for pulsed and continuous wave sound is the same 1/8. It depends only on the medium through which the sound travels |
| what is the duty factor if the pulse duration is 1 microsecond, and the pulse repetition period is 1 ms | duty factor is 0.001 or 10/3 10/6 divided by 10/3= 10/3 or 0.001 |
| what is the duty factor if the pulse duration is 1 millisecond, and the pulse repetition period is 1 second | the duty factor is 0.001 or 0.1% 0.001 divided by 1.0=0.001 |
| a reduction in the intensity of a sound beam to one-half of it's original value is ____dB | -3dB |
| A reduction in the intensity of a sound beam to one-quarter of it's original value is ___ | -6 dB |
| -10dB means that the intensity is reduced to ____ of it's original value. | one-tenth |
| dB is a mathematical representation with a _____ scale | logarithmic and relative |
| A wave's intensity is 2 mW/cm2 There is a change of +9dB. What is the final intensity | 16 mW/cm2 |
| Every 3dB change means that the intensity will ________ | double |
| Every 10 dB change means that the intensity will | increase ten times |
| if the final intensity of a sound beam is more than the initial intensity, then the gain in dB is _ | Positive |
| If the initial intensity of a sound beam is less than the final intensity, then the gain in dB is | Positive |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same. Period | remains the same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.frequency | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same. wavelength | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.speed | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.amplitude (initial) | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.pulse duration | remains same. |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.spatial pulse length | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.pulse repetition period | increases |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.PRF | decreases |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.duty factor | decreases |
| A sonographer is using a 3MHz transducer and changes to a 6 MHz transducer. The imaging depth remains unchanged. Would each of the following parameters increase, decrease, remain the same. Period | decreases |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.frequency | increases |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.wavelength | decreases |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same. speed | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.intensity | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.PRF | remains same |
| A sonographer adjusts the depth of view of an ultrasound scan from 8cm to 16 cm Would each of the following parameters increase, decrease or remain the same.pulse repetition period | remains same. |
Created by:
sold1234