Answer / bibhutibhusan0

It is the ratio between maximum to minimum.For ex.the turn down ratio of flow meter is the ratio between the maximum flow and the minimum flow to be measure .

Answer / sachin padole

Turn down ratio is related to furnace so,
It's ratio of at a constant flame stability, maximum flow of fuel to minimum flow of fuel through burner.

Answer / sappy

Step down transformer turn ratio. Secondary turn/primary turn

Answer / sanjeev kumar

no of turn in primary divided nby no of turns in secondary windig is called tarn ratio
Tr=N1/N2

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