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dwatch

dwatch
13問 • 2年前
  • Hope Nueva España
    • 通報

    問題一覧

  • 1

    generate the sound vibrations and also receive the reflected sound vibration.

    transducer

  • 2

    produce electrical oscillations for the transmitting transducer

    pulse generator

  • 3

    to amplify the weak electrical oscillations that has been generated by the receiving transducer on reception of the reflected sound vibration.

    amplifier

  • 4

    for measuring and indicating depth.

    recorder

  • 5

    The acoustic pulses of very short duration are transmitted vertically at the rate of

    5 to 600 pulses per minute having a beam width of 12 to 25°.

  • 6

    changes with temperature salinity & pressure

    Velocity of propagation in water

  • 7

    This error is found when two transducers are used, one for transmission and the other one for reception.

    Pythagoras error

  • 8

    The echo may be reflected no. of times from the bottom of the sea bed, hence providing the multiple depth marks on paper.

    multiple echoes

  • 9

    the water varies with temperature and salinity, which all tends to form different layers

    The thermal and density layers

  • 10

    If the zero is not adjusted properly, it will give error in reading

    Zero line adjustment error

  • 11

    When the sound wave is reflected from the reflected from the air bubbles, it will appear as dots.

    Aeration

  • 12

    If sensitivity of the amplifier is high, just after zero marking a narrow line along with the several irregular dots and dashes appear

    cross noise

  • 13

    Depth indicated in fresh water can be about 30% higher than the actual depth. What error of the echo sounder is this?

    velocity error

    • nav

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    Hope Nueva España · 58問 · 2年前

    nav

    nav

    58問 • 2年前
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    90問 • 2年前
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    60問 • 2年前
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    Hope Nueva España · 50問 · 2年前

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    Hope Nueva España · 25問 · 2年前

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    25問 • 2年前
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    37問 • 2年前
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    Hope Nueva España · 50問 · 1年前

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    seammidterms

    50問 • 1年前
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    navmidterms

    Hope Nueva España · 40問 · 1年前

    navmidterms

    navmidterms

    40問 • 1年前
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    navmidterms2

    navmidterms2

    Hope Nueva España · 18問 · 1年前

    navmidterms2

    navmidterms2

    18問 • 1年前
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    Hope Nueva España · 55問 · 1年前

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    entrepmid

    55問 • 1年前
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    Hope Nueva España · 35問 · 1年前

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    Hope Nueva España · 36問 · 1年前

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    mtexfinal

    36問 • 1年前
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    問題一覧

  • 1

    generate the sound vibrations and also receive the reflected sound vibration.

    transducer

  • 2

    produce electrical oscillations for the transmitting transducer

    pulse generator

  • 3

    to amplify the weak electrical oscillations that has been generated by the receiving transducer on reception of the reflected sound vibration.

    amplifier

  • 4

    for measuring and indicating depth.

    recorder

  • 5

    The acoustic pulses of very short duration are transmitted vertically at the rate of

    5 to 600 pulses per minute having a beam width of 12 to 25°.

  • 6

    changes with temperature salinity & pressure

    Velocity of propagation in water

  • 7

    This error is found when two transducers are used, one for transmission and the other one for reception.

    Pythagoras error

  • 8

    The echo may be reflected no. of times from the bottom of the sea bed, hence providing the multiple depth marks on paper.

    multiple echoes

  • 9

    the water varies with temperature and salinity, which all tends to form different layers

    The thermal and density layers

  • 10

    If the zero is not adjusted properly, it will give error in reading

    Zero line adjustment error

  • 11

    When the sound wave is reflected from the reflected from the air bubbles, it will appear as dots.

    Aeration

  • 12

    If sensitivity of the amplifier is high, just after zero marking a narrow line along with the several irregular dots and dashes appear

    cross noise

  • 13

    Depth indicated in fresh water can be about 30% higher than the actual depth. What error of the echo sounder is this?

    velocity error