What is definition of backwash?

1 : a backward flow or movement (as of water or air) produced especially by a propelling force also : the fluid that is moving backward.

Is backwash a word?

backwash noun (WATER) the backward movement of waves, or the backward movement of water caused by something, such as a boat, passing through it: The waterskier was caught in the backwash from a motorboat.

What does backwash mean when drinking?

In colloquial use, chiefly in North America, the word backwash can refer to the unappetizing mixture of saliva and beverage that flows back into a glass or bottle after a person takes a drink.

What is meant by the term slipstream?

1 : a stream of fluid (such as air or water) driven aft by a propeller. 2 : an area of reduced air pressure and forward suction immediately behind a rapidly moving vehicle. slipstream. verb. slipstreamed; slipstreaming; slipstreams.

What is backwash in language testing?

The backwash effect (also known as the washback effect) is the influence that a test has on the way students are taught (e.g. the teaching mirrors the test because teachers want their students to pass). The washback effect is the outcome of a test or an examination which results either in positive or in a negative way.

What does backwash mean in geography?

When a wave breaks, water is washed up the beach. This is called the swash . Then the water runs back down the beach, which is called the backwash . This means that the beach increases in size. If the swash is weaker than the backwash (destructive wave), very little sediment is carried up the beach.

Why is it called backwash?

The term “backwash,” referring to the mix of beverage and saliva that sloshes back into a shared drink, has been in use only since the mid-1980s. There’s also evidence that backwash contains bacteria, and that sharing drinks can spread disease.

What’s another word for slipstream?

Slipstream Synonyms – WordHippo Thesaurus….What is another word for slipstream?

What is backwash effect in education?

Assessment or academic performance enables students either to achieve higher grades of studies or seek employment. The term ”backwash” denotes either negative or positive effects of assessment on learning and teaching activities (Buck, G. 1988).

What is backwash or backwashing?

Backwash, or backwashing, is a method to thoroughly clean a swimming pool ‘s filter and avoid having to clean it manually. It usually takes just a few minutes. You’ll know it’s time to perform the backwashing routine when the pressure gauge indicates a pressure rise of 8 to 10 pounds above the clean or “startup” pressure.

What is backwash in water treatment?

In terms of water treatment, including water purification and sewage treatment, backwashing refers to pumping water backwards through the filters media, sometimes including intermittent use of compressed air during the process. Backwashing is a form of preventive maintenance so that the filter media can be reused.

What is back washing?

Backwash or backwashing is the process of thoroughly cleaning a swimming pool ‘s filter by a method of reversing the flow of water to flush out contaminants. This way, you don’t have to clean the filter manually, and it usually takes just a few minutes. Continue the process until the water runs clear through…