backpressure

American  

[bak-presh-er] / ˈbækˌprɛʃ ər /

Or back pressure

noun

1. a resistant pressure exerted by liquid or gas against the forward motion or flow of an exhaust or pipe system.

   Careful control of backpressure ensures an even supply of oil from the well.

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Etymology

Origin of backpressure

First recorded in 1860–65; back ¹ ( def. ) + pressure ( def. )

Example Sentences

That resistance creates a backpressure in the airways, dilating the muscles that would otherwise collapse in the middle of the night.

From New York Times • Apr. 9, 2012

Depending on the positioning of the engine, power loss due to exhaust backpressure may be less than what can be achieved in a conventional installation.

From Time Magazine Archive

Another possible cause is built-up backpressure from a plugged exhaust system.

From Time Magazine Archive

Worn fuel injectors or under-loaded gensets can cause a buildup of carbon in the exhaust that�s sufficient enough to increase backpressure.

From Time Magazine Archive

First, the engine was mounted on flexible rubber isolation mounts, as are the custom oversized pot-style mufflers that help reduce backpressure and also pass exhaust underwater.

From Time Magazine Archive