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mechanical frawing instrument
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Types of mechanical instruments
Types of mechanical instruments 1)Active and passive instrument. The instrument which require external power for manipulation and measurement is generally known as a active instrument. eg.potentiometer. The instrument which does not require external power for manipulation and measurement is generally known as a Passive instrument. eg. Liquid level measurement using fload and gear arrangement 2)Analog and digital instrument: The analog instrument in which the output can have an infinite number of values within the range that the instrument is designed to measure.eg.voltmeter The analog instrument in which the output can have an finite number of values within the range that the instrument is designed to measure. eg .electronic speedmeter 3)Null type and deflection type instruments: In the deflection type instrument quantity being measure displayed in terms of the amount of Pointers deflection Eg.pressure gauge. In null type instrument measurement is done...
Pitot tube
A pitot tube is used to determine the velocit y of a fluid flowing through a pipe Principle:pitot tube uses the principle based on bernoullies equation to measure the flow. Most pitot tube consist of two tubes.one measure the static pressure and the other higher pressure.low pressure tube measure static pressure and Higher pressure tube measuresure the the static pressure plus pressure required to stop flow. volumetric FlowFlow rate can be obtained using equation Q=KAV K=flowflow coefgicient A=c/s area V=velocity of flowing fluid.