A) Anemometer-Wind speed
B) Ammeter-Electric Current
C) Tachometer-Pressure Difference
D) Pyrometer "High Temperature
Correct Answer: C
Solution :
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 cornmori.
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