Which instrument can be used to tell you when to shift gears?

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Multiple Choice

Which instrument can be used to tell you when to shift gears?

Explanation:
Engine speed, shown on the tachometer, tells you when to shift gears. Shifting is guided by revolutions per minute to keep the engine in its efficient operating range and avoid redline, so watching the RPM helps you choose the right gear. The speedometer measures how fast you’re going, not how hard the engine is working. The fuel gauge shows fuel level, and the odometer tracks miles traveled.

Engine speed, shown on the tachometer, tells you when to shift gears. Shifting is guided by revolutions per minute to keep the engine in its efficient operating range and avoid redline, so watching the RPM helps you choose the right gear. The speedometer measures how fast you’re going, not how hard the engine is working. The fuel gauge shows fuel level, and the odometer tracks miles traveled.

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