Which of the following is used to measure the speed of a rotating shaft?
A. Thermocouple
B. Pressure gauge
C. Flow meter
D. Tachometer
Answer:D
Which of the following is used to measure the speed of a rotating shaft?
A. Thermocouple B. Pressure gauge C. Flow meter D. Tachometer
Explanation: A tachometer is a device that measures the rotational speed of a shaft.