The concentration is calculated on the volume of water that is in the well. The concentration must be at least 200 milligrams of chlorine per litre of water present in the well and must be left in the well for at least 12 hours to ensure any bacteria present are.
idles; idled; idling. Learner's definition of IDLE. 1. of an engine or vehicle: to run without being connected for doing useful work. [no object]. She left the engine idling for a few seconds before she turned it off. The cars idled in traffic.
The phrase, âan engine brake,â does not âclearly referâ to a kind of brake (noun), and not a kind of braking. I can just as easily refer to the well-known kind of engine braking that all engines do, as using an engine brake to slow my car.