GK
UNITS DEVICES DIMENSIONS AND MEASUREMENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Machmeter
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Manometer
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Micrometer
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Magnetometer
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Detailed explanation-1: -A machmeter is an instrument which provides an indication of the Mach Number, (M), which is the ratio between the aircraft true air speed (TAS) and the local speed of sound (LSS). This ratio, which equals one when the TAS is equal to the local speed of sound, is very important in aircraft operating at high speed.
Detailed explanation-2: -Once the speed of sound is known, the Mach number can be easily computed by dividing the airspeed of the vehicle by the speed of sound. Or conversely, the airspeed of the vehicle can be found by multiplying the speed of sound by the Mach number.
Detailed explanation-3: -A machmeter is an instrument that measures the ratio of an aircraft’s true air speed (TAS) in relation to the speed of sound. When the TAS is equal to the local sound speed, the ratio becomes one. This ratio is denoted as Mach number, a dimensionless quantity.