Which of the following instruments is used to measure the speed of rotation of a shaft?
A. Tachometer
B. Multimeter
C. Oscilloscope
D. Voltmeter
Answer:A
Which of the following instruments is used to measure the speed of rotation of a shaft?
A. Tachometer B. Multimeter C. Oscilloscope D. Voltmeter
Explanation: A tachometer is an instrument used to measure the speed of rotation of a shaft, typically in units of revolutions per minute (RPM).