What does rpm on tachometers stand for?

Answer RPM on tachometers stands for "revolutions per minute." According to the Columbia Encyclopedia, a tachometer is used to indicate the speed at which the shaft of an engine is rotating, as measured i... Read More »

Top Q&A For: What does rpm on tachometers stand for

How do tachometers work?

A tachometer, or rev counter, is a device that counts the revolutions of a mechanical object over a set time period. For example, a car's dashboard tachometer counts the number of revolutions per m... Read More »

How to Mount Tachometers Without Drilling?

A tachometer measures the revolutions per minute, or RPM, of a working engine. Many cars today have tachometers built into its system of gauges. This has not always been the case. Vehicles without ... Read More »

What does CCTV stand for and how does it work?

Closed Circuit Television (CCTV) is the use of video cameras to transmit signal to a specific, limited set of monitors. It differs from broadcast television in that the signal is not openly transmi... Read More »

What does PD stand for?

P.D. usually stands for "Police Department", but in the legal context it stands for "Public Defender."