MCQ
A tachometer is a device to measure
  • A
    Speed of rotation
  • Gravitational pull
  • C
    Surface tension
  • D
    Tension in a spring

Answer

Correct option: B.
Gravitational pull
b
A tachometer is an instrument designed to measure the rotation speed of a shaft or disk. Tachometers generally measure rotations per minute $(RPM)$ though some models also serve as rate meters and/or totalizers.

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