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What is the temperature dropping in the radiator of a tractor when the flow rate of water is 0.16 litre per second per KW?

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What is the temperature dropping in the radiator of a tractor when the flow rate of water is 0.16 litre per second per KW?

(a) 8.5°C to 5.5 °C

(b) 11°C to 10 °C

(c) 20°C to 15 °C

(d) 12.75 °C to 9.79°C

The question was asked in examination.

This intriguing question originated from Cooling System in chapter Fuel Supply and Cooling System of Farm Machinery

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Best answer
The correct option is (a) 8.5°C to 5.5 °C

The best explanation: In tractors, the required flow rate of water is 0.16 litre per sec per KW to drop radiator temperature 8.5°C to 5.5°C. At 2000 rpm the diesel engine and petrol engine rejects 0.58 and 0.75 KW for each kilo watt output respectively.

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