tach

Thân thiện

A mechanic uses a tach to check the engine's RPM.

Definition

1. Noun:
   • A device for measuring speed of rotation: A "tach" is an instrument that indicates the rotational speed of an engine or other rotating object, typically measured in revolutions per minute (RPM). It is a short form of "tachometer."

Usage

• The word "tach" is an informal, clipped form of "tachometer." It is primarily used in technical, automotive, or mechanical contexts. It functions as a countable noun.

Examples

• Noun:
  • Keep an eye on the tach to avoid over-revving the engine.
  • The mechanic connected a digital tach to diagnose the motor's performance.

Advanced Usage

• "To redline the tach": To operate an engine at or near its maximum safe RPM, as indicated on the tachometer's red zone.
  • He redlined the tach during the race, risking engine damage.

Variants and Related Words

• Tachometer (n): The full, formal term for the measuring instrument.
  • The car's dashboard includes a speedometer and a tachometer.

Synonyms

• Rev counter (n): Another common term for a tachometer, especially in British English.
• RPM gauge (n): A descriptive synonym emphasizing the unit of measurement.

Related Phrases

• Tach reading: The specific RPM value shown by the instrument at a given moment.
  • The tach reading was steady at 3000 RPM while cruising.

Học thuật

Noun

1. measuring instrument for indicating speed of rotation

Từ đồng nghĩa

• tachometer