Which device is used to monitor the rotational speed of a motor shaft?

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Multiple Choice

Which device is used to monitor the rotational speed of a motor shaft?

Explanation:
Measuring rotational speed (RPM) of a motor shaft is what a tachometer is designed to do. A tachometer converts how fast the shaft rotates into a readable signal, typically RPM, using a sensor that counts revolutions per minute. This is essential for motor control and maintenance because knowing the shaft speed lets you monitor performance, keep the motor within safe operating limits, and provide speed feedback for control systems. The other devices measure different quantities: a speedometer tracks vehicle speed, an altimeter measures altitude, and an anemometer measures wind speed. So the tachometer is the device that best fits monitoring shaft rotation.

Measuring rotational speed (RPM) of a motor shaft is what a tachometer is designed to do. A tachometer converts how fast the shaft rotates into a readable signal, typically RPM, using a sensor that counts revolutions per minute. This is essential for motor control and maintenance because knowing the shaft speed lets you monitor performance, keep the motor within safe operating limits, and provide speed feedback for control systems. The other devices measure different quantities: a speedometer tracks vehicle speed, an altimeter measures altitude, and an anemometer measures wind speed. So the tachometer is the device that best fits monitoring shaft rotation.

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