Question:
Which of the following device is used to measure the speed of Internal Combustion Engine?
Which of the following device is used to measure the speed of Internal Combustion Engine?
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To remember this, think of "Tacho" which comes from the Greek word for "speed." Just as a speedometer measures linear speed, a Tachometer measures rotational speed.
Updated On: Jul 1, 2026
- Odometer
- Dynamometer
- Tachometer
- Rotameter
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The Correct Option is C
Solution and Explanation
In the operation and testing of internal combustion engines, measuring the rotational speed of the crankshaft is a fundamental requirement for determining performance characteristics.
1. Defining the Tachometer:
A
Tachometer is an instrument designed to measure the rotation speed of a shaft or disk, such as in a motor or other machine. In the context of an IC engine, it measures the revolutions per minute (RPM) of the crankshaft.
2. Types of Tachometers:
• Contact Type: Requires physical contact with the rotating shaft to measure speed.
• Non-Contact (Optical) Type: Uses a laser or light beam and a reflective tape on the shaft to measure speed without physical contact.
3. Functions of Other Devices:
• Odometer: Measures the total distance traveled by a vehicle.
• Dynamometer: Measures the torque and brake power (BP) of an engine, not just its speed.
• Rotameter: A device used to measure the flow rate of a liquid or gas in a closed tube.
Knowing the RPM via a tachometer is essential for calculating power and ensuring the engine operates within its designed safety limits.
Tachometer is an instrument designed to measure the rotation speed of a shaft or disk, such as in a motor or other machine. In the context of an IC engine, it measures the revolutions per minute (RPM) of the crankshaft.
2. Types of Tachometers:
• Contact Type: Requires physical contact with the rotating shaft to measure speed.
• Non-Contact (Optical) Type: Uses a laser or light beam and a reflective tape on the shaft to measure speed without physical contact.
3. Functions of Other Devices:
• Odometer: Measures the total distance traveled by a vehicle.
• Dynamometer: Measures the torque and brake power (BP) of an engine, not just its speed.
• Rotameter: A device used to measure the flow rate of a liquid or gas in a closed tube.
Knowing the RPM via a tachometer is essential for calculating power and ensuring the engine operates within its designed safety limits.
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