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Important Scientific Instruments & their usage Test 168
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Important Scientific Instruments & their usage Test 168
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  • Question 1/10
    1 / -0.25
    A device used for measuring the depth of the sea is called_______.
    Solutions
    • Fathometer also called echo sounder, is a device used on ships to determine the depth of water by measuring the time it takes a sound (sonic pulse) produced just below the water surface to return, or echo, from the bottom of the body of water.
  • Question 2/10
    1 / -0.25
    Atmoshperic pressure is measured with a_______.
    Solutions
    Barometer is used to measure atmospheric pressure, which in turn assist in predicting the weather. Thus a "rising" barometer indicates increasing air pressure; and a "falling" barometer indicates decreasing air pressure.
  • Question 3/10
    1 / -0.25
    Which instrument is used to measure altitudes in aircraft?
    Solutions
    An altimeter is an instrument used to measure the altitude of an object above a fixed level. The measurement of altitude is called altimetry. A pressure altimeter is found in most aircraft.
  • Question 4/10
    1 / -0.25
    Which measuring device is used to measure the power of electromagnetic radiations?
    Solutions
    • Bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance.
    • It was invented in 1878 by the American astronomer Samuel Pierpont Langley.
    • It uses the temperature sensitive resistive element whose resistance changes with the temperature.
  • Question 5/10
    1 / -0.25
    Which instrument is used to measure very high temperatures?
    Solutions
    A pyrometer is a device for measuring very high temperatures and uses the principle that all substances emit radiant energy when hot, the rate of emission depending on their temperature. There are two main types of pyrometer, namely the total radiation pyrometer and the optical pyrometer.
  • Question 6/10
    1 / -0.25
    Which instrument is used to measure the distance travelled by a vehicle?
    Solutions
    An odometer is an instrument used for measuring the distance travelled by a vehicle, such as a bicycle or car, by measuring the number of rotations of a wheel or fan whose rate of rotation depends on the speed of the vehicle.
  • Question 7/10
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    Which instrument is used for measuring the relative humidity of the atmosphere?
    Solutions

    • Hygrometer - Measuring the relative humidity of the atmosphere

    • Hydrophone - For measuring sound under water

    • Pyrheliometer - Measuring solar radiation received at the earth

    • Hydrometer - Measuring the relative density or specific gravity of the liquid.

  • Question 8/10
    1 / -0.25
    The density of milk is measured by
    Solutions
    The density of milk is measured by lactometer.
    The thermometer is to measure the temperature of an object, environment and atmosphere.
    A hydrometer is an instrument used for measuring the relative density of liquids.
    A barometer is a scientific instrument that is used to measure air pressure.
    A hygrometer is an instrument used to measure the amount of humidity and water vapour.
  • Question 9/10
    1 / -0.25
    ‘Udometer’ instrument is used for?
    Solutions
    A rain gauge (also known as an Udometer, pluviometer or an ombrometer) is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over a set period of time.
  • Question 10/10
    1 / -0.25
    A tachometer is a device used to measure____.
    Solutions
    A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.
    Hence, option is B correct.
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