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What is the RPM in Car? What is the use of RPM in a car?

What is the RPM in Car? What is the use of RPM in a car?

The full form of RPM is revolution per minute. And its measure, how fast a machine is working within the given time. And in-car RPM gives us details about it.



- How many times an engine crankshaft rotates in one minute.

- How many time times piston goes up and down in one minute.

Crankshaft and piston are connected.


Car RPM will increase if we will press the accelerator. More speed more RPM. In the car, the tachometer shows the RPM. And it shows thousands of times per minute. In the tachometer, you will see numbers from 0 to 9 or 10.

So when you will start the car and press the accelerator the Tachometer will show you the RPM. If it is in 2 it means the car engine crankshaft rotates 2000 times per minute.

In the last number, there is a red line in the tachometer. That shows if you will speed up your car to this line it can damage your engine.

Use of the RPM -

1. By knowing RPM you should change gear as per RPM level. If your RPM is more you should also put Higher gear.

You can also know if your engine is working ok by RPM. If your RPM showing abnormal that means there is some problem in the engine. 

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